From e7372d18a1a661d8c3dba9f51e1f17b5f94171a7 Mon Sep 17 00:00:00 2001
From: Daniel Lange <DLange@git.local>
Date: Wed, 10 Jan 2024 11:17:08 +0100
Subject: New upstream version 3.3.0

---
 linux/CGroupUtils.c        |  255 ++++-
 linux/CGroupUtils.h        |    6 +-
 linux/HugePageMeter.c      |   14 +-
 linux/IOPriorityPanel.c    |    2 +
 linux/LibSensors.c         |   41 +-
 linux/LibSensors.h         |    8 +-
 linux/LinuxMachine.c       |  695 ++++++++++++++
 linux/LinuxMachine.h       |  109 +++
 linux/LinuxProcess.c       |  204 ++--
 linux/LinuxProcess.h       |   19 +-
 linux/LinuxProcessList.c   | 2249 --------------------------------------------
 linux/LinuxProcessList.h   |  126 ---
 linux/LinuxProcessTable.c  | 1668 ++++++++++++++++++++++++++++++++
 linux/LinuxProcessTable.h  |   35 +
 linux/Platform.c           |  321 ++++---
 linux/Platform.h           |   39 +-
 linux/PressureStallMeter.c |   21 +
 linux/PressureStallMeter.h |    2 +
 linux/ProcessField.h       |    2 +
 linux/SELinuxMeter.c       |    2 +
 linux/SystemdMeter.c       |  189 ++--
 linux/SystemdMeter.h       |    2 +
 linux/ZramMeter.c          |   31 +-
 linux/ZramMeter.h          |   12 +
 linux/ZramStats.h          |    8 +
 linux/ZswapStats.h         |   19 +
 26 files changed, 3317 insertions(+), 2762 deletions(-)
 create mode 100644 linux/LinuxMachine.c
 create mode 100644 linux/LinuxMachine.h
 delete mode 100644 linux/LinuxProcessList.c
 delete mode 100644 linux/LinuxProcessList.h
 create mode 100644 linux/LinuxProcessTable.c
 create mode 100644 linux/LinuxProcessTable.h
 create mode 100644 linux/ZswapStats.h

(limited to 'linux')

diff --git a/linux/CGroupUtils.c b/linux/CGroupUtils.c
index 22cce91..f352b8e 100644
--- a/linux/CGroupUtils.c
+++ b/linux/CGroupUtils.c
@@ -1,17 +1,48 @@
 /*
-htop - CGroupUtils.h
+htop - CGroupUtils.c
 (C) 2021 htop dev team
 Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "linux/CGroupUtils.h"
 
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "Macros.h"
 #include "XUtils.h"
 
 
+static const char* str_slice_suffix = ".slice";
+static const char* str_system_slice = "system.slice";
+static const char* str_user_slice = "user.slice";
+static const char* str_machine_slice = "machine.slice";
+static const char* str_user_slice_prefix = "/user-";
+static const char* str_system_slice_prefix = "/system-";
+
+static const char* str_lxc_monitor_legacy = "lxc.monitor";
+static const char* str_lxc_payload_legacy = "lxc.payload";
+static const char* str_lxc_monitor_prefix = "lxc.monitor.";
+static const char* str_lxc_payload_prefix = "lxc.payload.";
+
+static const char* str_nspawn_scope_prefix = "machine-";
+static const char* str_nspawn_monitor_label = "/supervisor";
+static const char* str_nspawn_payload_label = "/payload";
+
+static const char* str_snap_scope_prefix = "snap.";
+static const char* str_pod_scope_prefix = "libpod-";
+static const char* str_docker_scope_prefix = "docker-";
+
+static const char* str_service_suffix = ".service";
+static const char* str_scope_suffix = ".scope";
+
 typedef struct StrBuf_state {
-   char *buf;
+   char* buf;
    size_t size;
    size_t pos;
 } StrBuf_state;
@@ -60,28 +91,7 @@ static bool Label_checkSuffix(const char* labelStart, size_t labelLen, const cha
    return labelLen > strlen(expected) && String_startsWith(labelStart + labelLen - strlen(expected), expected);
 }
 
-static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrBuf_putc_t w) {
-   const char* str_slice_suffix = ".slice";
-   const char* str_system_slice = "system.slice";
-   const char* str_user_slice = "user.slice";
-   const char* str_machine_slice = "machine.slice";
-   const char* str_user_slice_prefix = "/user-";
-   const char* str_system_slice_prefix = "/system-";
-
-   const char* str_lxc_monitor_legacy = "lxc.monitor";
-   const char* str_lxc_payload_legacy = "lxc.payload";
-   const char* str_lxc_monitor_prefix = "lxc.monitor.";
-   const char* str_lxc_payload_prefix = "lxc.payload.";
-
-   const char* str_nspawn_scope_prefix = "machine-";
-   const char* str_nspawn_monitor_label = "/supervisor";
-   const char* str_nspawn_payload_label = "/payload";
-
-   const char* str_snap_scope_prefix = "snap.";
-
-   const char* str_service_suffix = ".service";
-   const char* str_scope_suffix = ".scope";
-
+static bool CGroup_filterName_internal(const char* cgroup, StrBuf_state* s, StrBuf_putc_t w) {
    while (*cgroup) {
       if ('/' == *cgroup) {
          while ('/' == *cgroup)
@@ -94,7 +104,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
       }
 
       const char* labelStart = cgroup;
-      const char* nextSlash = strchrnul(labelStart, '/');
+      const char* nextSlash = String_strchrnul(labelStart, '/');
       const size_t labelLen = nextSlash - labelStart;
 
       if (Label_checkEqual(labelStart, labelLen, str_system_slice)) {
@@ -104,7 +114,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
             return false;
 
          if (String_startsWith(cgroup, str_system_slice_prefix)) {
-            cgroup = strchrnul(cgroup + 1, '/');
+            cgroup = String_strchrnul(cgroup + 1, '/');
             continue;
          }
 
@@ -129,7 +139,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
          if (!String_startsWith(cgroup, str_user_slice_prefix))
             continue;
 
-         const char* userSliceSlash = strchrnul(cgroup + strlen(str_user_slice_prefix), '/');
+         const char* userSliceSlash = String_strchrnul(cgroup + strlen(str_user_slice_prefix), '/');
          const char* sliceSpec = userSliceSlash - strlen(str_slice_suffix);
 
          if (!String_startsWith(sliceSpec, str_slice_suffix))
@@ -212,7 +222,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
          while (*labelStart == '/')
             labelStart++;
 
-         nextSlash = strchrnul(labelStart, '/');
+         nextSlash = String_strchrnul(labelStart, '/');
          if (nextSlash - labelStart > 0) {
             if (!StrBuf_putsz(s, w, isMonitor ? "[LXC:" : "[lxc:"))
                return false;
@@ -237,7 +247,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
          if (String_startsWith(cgroup, "user@")) {
             cgroup = nextSlash;
 
-            while(*cgroup == '/')
+            while (*cgroup == '/')
                cgroup++;
 
             continue;
@@ -275,8 +285,8 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
                cgroup += strlen(str_nspawn_payload_label);
 
             continue;
-         } else if(Label_checkPrefix(labelStart, scopeNameLen, str_snap_scope_prefix)) {
-            const char* nextDot = strchrnul(labelStart + strlen(str_snap_scope_prefix), '.');
+         } else if (Label_checkPrefix(labelStart, scopeNameLen, str_snap_scope_prefix)) {
+            const char* nextDot = String_strchrnul(labelStart + strlen(str_snap_scope_prefix), '.');
 
             if (!StrBuf_putsz(s, w, "!snap:"))
                return false;
@@ -290,6 +300,40 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
 
             cgroup = nextSlash;
 
+            continue;
+         } else if (Label_checkPrefix(labelStart, scopeNameLen, str_pod_scope_prefix)) {
+            const char* nextDot = String_strchrnul(labelStart + strlen(str_pod_scope_prefix), '.');
+
+            if (!StrBuf_putsz(s, w, "!pod:"))
+               return false;
+
+            if (nextDot >= labelStart + scopeNameLen) {
+               nextDot = labelStart + scopeNameLen;
+            }
+
+            if (!StrBuf_putsn(s, w, labelStart + strlen(str_pod_scope_prefix),
+               MINIMUM( nextDot - (labelStart + strlen(str_pod_scope_prefix)), 12)))
+               return false;
+
+            cgroup = nextSlash;
+
+            continue;
+         } else if (Label_checkPrefix(labelStart, scopeNameLen, str_docker_scope_prefix)) {
+            const char* nextDot = String_strchrnul(labelStart + strlen(str_docker_scope_prefix), '.');
+
+            if (!StrBuf_putsz(s, w, "!docker:"))
+               return false;
+
+            if (nextDot >= labelStart + scopeNameLen) {
+               nextDot = labelStart + scopeNameLen;
+            }
+
+            if (!StrBuf_putsn(s, w, labelStart + strlen(str_docker_scope_prefix),
+               MINIMUM( nextDot - (labelStart + strlen(str_docker_scope_prefix)), 12)))
+               return false;
+
+            cgroup = nextSlash;
+
             continue;
          }
 
@@ -316,7 +360,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
    return true;
 }
 
-char* CGroup_filterName(const char *cgroup) {
+char* CGroup_filterName(const char* cgroup) {
    StrBuf_state s = {
       .buf = NULL,
       .size = 0,
@@ -339,3 +383,150 @@ char* CGroup_filterName(const char *cgroup) {
    s.buf[s.size] = '\0';
    return s.buf;
 }
+
+static bool CGroup_filterContainer_internal(const char* cgroup, StrBuf_state* s, StrBuf_putc_t w) {
+   while (*cgroup) {
+      if ('/' == *cgroup) {
+         while ('/' == *cgroup)
+            cgroup++;
+
+         continue;
+      }
+
+      const char* labelStart = cgroup;
+      const char* nextSlash = String_strchrnul(labelStart, '/');
+      const size_t labelLen = nextSlash - labelStart;
+
+      if (Label_checkPrefix(labelStart, labelLen, str_lxc_payload_prefix)) {
+         const size_t cgroupNameLen = labelLen - strlen(str_lxc_payload_prefix);
+
+         if (!StrBuf_putsz(s, w, "/lxc:"))
+            return false;
+
+         if (!StrBuf_putsn(s, w, cgroup + strlen(str_lxc_payload_prefix), cgroupNameLen))
+            return false;
+
+         cgroup = nextSlash;
+
+         continue;
+      }
+
+      // LXC legacy cgroup naming
+      if (Label_checkEqual(labelStart, labelLen, str_lxc_payload_legacy)) {
+         labelStart = nextSlash;
+         while (*labelStart == '/')
+            labelStart++;
+
+         nextSlash = String_strchrnul(labelStart, '/');
+         if (nextSlash - labelStart > 0) {
+            if (!StrBuf_putsz(s, w, "/lxc:"))
+               return false;
+
+            if (!StrBuf_putsn(s, w, labelStart, nextSlash - labelStart))
+               return false;
+
+            cgroup = nextSlash;
+            continue;
+         }
+
+         labelStart = cgroup;
+         nextSlash = labelStart + labelLen;
+      }
+
+      if (Label_checkSuffix(labelStart, labelLen, str_scope_suffix)) {
+         const size_t scopeNameLen = labelLen - strlen(str_scope_suffix);
+
+         if (Label_checkPrefix(labelStart, scopeNameLen, str_nspawn_scope_prefix)) {
+            const size_t machineScopeNameLen = scopeNameLen - strlen(str_nspawn_scope_prefix);
+
+            const bool is_monitor = String_startsWith(nextSlash, str_nspawn_monitor_label);
+
+            if (!is_monitor) {
+               if (!StrBuf_putsz(s, w, "/snc:"))
+                  return false;
+
+               if (!StrBuf_putsn(s, w, cgroup + strlen(str_nspawn_scope_prefix), machineScopeNameLen))
+                  return false;
+            }
+
+            cgroup = nextSlash;
+            if (String_startsWith(nextSlash, str_nspawn_monitor_label))
+               cgroup += strlen(str_nspawn_monitor_label);
+            else if (String_startsWith(nextSlash, str_nspawn_payload_label))
+               cgroup += strlen(str_nspawn_payload_label);
+
+            continue;
+         } else if (Label_checkPrefix(labelStart, scopeNameLen, str_pod_scope_prefix)) {
+            const char* nextDot = String_strchrnul(labelStart + strlen(str_pod_scope_prefix), '.');
+
+            if (!StrBuf_putsz(s, w, "/pod:"))
+               return false;
+
+            if (nextDot >= labelStart + scopeNameLen) {
+               nextDot = labelStart + scopeNameLen;
+            }
+
+            if (!StrBuf_putsn(s, w, labelStart + strlen(str_pod_scope_prefix),
+               MINIMUM( nextDot - (labelStart + strlen(str_pod_scope_prefix)), 12)))
+               return false;
+
+            cgroup = nextSlash;
+
+            continue;
+         } else if (Label_checkPrefix(labelStart, scopeNameLen, str_docker_scope_prefix)) {
+            const char* nextDot = String_strchrnul(labelStart + strlen(str_docker_scope_prefix), '.');
+
+            if (!StrBuf_putsz(s, w, "!docker:"))
+               return false;
+
+            if (nextDot >= labelStart + scopeNameLen) {
+               nextDot = labelStart + scopeNameLen;
+            }
+
+            if (!StrBuf_putsn(s, w, labelStart + strlen(str_docker_scope_prefix),
+               MINIMUM( nextDot - (labelStart + strlen(str_docker_scope_prefix)), 12)))
+               return false;
+
+            cgroup = nextSlash;
+
+            continue;
+         }
+
+         cgroup = nextSlash;
+
+         continue;
+      }
+
+      cgroup = nextSlash;
+   }
+
+   return true;
+}
+
+char* CGroup_filterContainer(const char* cgroup) {
+   StrBuf_state s = {
+      .buf = NULL,
+      .size = 0,
+      .pos = 0,
+   };
+
+   if (!CGroup_filterContainer_internal(cgroup, &s, StrBuf_putc_count)) {
+      return NULL;
+   }
+
+   if (!s.pos) {
+      return xStrdup("/");
+   }
+
+   s.buf = xCalloc(s.pos + 1, sizeof(char));
+   s.size = s.pos;
+   s.pos = 0;
+
+   if (!CGroup_filterContainer_internal(cgroup, &s, StrBuf_putc_write)) {
+      free(s.buf);
+      return NULL;
+   }
+
+   s.buf[s.size] = '\0';
+   return s.buf;
+}
diff --git a/linux/CGroupUtils.h b/linux/CGroupUtils.h
index db2df7f..972a15b 100644
--- a/linux/CGroupUtils.h
+++ b/linux/CGroupUtils.h
@@ -7,10 +7,8 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include <stdbool.h>
-#include <stddef.h>
 
-
-char* CGroup_filterName(const char *cgroup);
+char* CGroup_filterName(const char* cgroup);
+char* CGroup_filterContainer(const char* cgroup);
 
 #endif /* HEADER_CGroupUtils */
diff --git a/linux/HugePageMeter.c b/linux/HugePageMeter.c
index 1efde2f..058ab4b 100644
--- a/linux/HugePageMeter.c
+++ b/linux/HugePageMeter.c
@@ -5,6 +5,8 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "linux/HugePageMeter.h"
 
 #include <assert.h>
@@ -12,11 +14,11 @@ in the source distribution for its full text.
 #include <stddef.h>
 
 #include "CRT.h"
+#include "Machine.h"
 #include "Macros.h"
 #include "Object.h"
-#include "ProcessList.h"
 #include "RichString.h"
-#include "linux/LinuxProcessList.h"
+#include "linux/LinuxMachine.h"
 
 
 static const char* HugePageMeter_active_labels[4] = { NULL, NULL, NULL, NULL };
@@ -43,8 +45,8 @@ static void HugePageMeter_updateValues(Meter* this) {
    memory_t usedTotal = 0;
    unsigned nextUsed = 0;
 
-   const LinuxProcessList* lpl = (const LinuxProcessList*) this->pl;
-   this->total = lpl->totalHugePageMem;
+   const LinuxMachine* host = (const LinuxMachine*) this->host;
+   this->total = host->totalHugePageMem;
    this->values[0] = 0;
    HugePageMeter_active_labels[0] = " used:";
    for (unsigned i = 1; i < ARRAYSIZE(HugePageMeter_active_labels); i++) {
@@ -52,7 +54,7 @@ static void HugePageMeter_updateValues(Meter* this) {
       HugePageMeter_active_labels[i] = NULL;
    }
    for (unsigned i = 0; i < HTOP_HUGEPAGE_COUNT; i++) {
-      memory_t value = lpl->usedHugePageMem[i];
+      memory_t value = host->usedHugePageMem[i];
       if (value != MEMORY_MAX) {
          this->values[nextUsed] = value;
          usedTotal += value;
@@ -80,7 +82,7 @@ static void HugePageMeter_display(const Object* cast, RichString* out) {
    RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
 
    for (unsigned i = 0; i < ARRAYSIZE(HugePageMeter_active_labels); i++) {
-      if (isnan(this->values[i])) {
+      if (!HugePageMeter_active_labels[i]) {
          break;
       }
       RichString_appendAscii(out, CRT_colors[METER_TEXT], HugePageMeter_active_labels[i]);
diff --git a/linux/IOPriorityPanel.c b/linux/IOPriorityPanel.c
index 3e91bc4..8d0ef7b 100644
--- a/linux/IOPriorityPanel.c
+++ b/linux/IOPriorityPanel.c
@@ -5,6 +5,8 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "linux/IOPriorityPanel.h"
 
 #include <stdbool.h>
diff --git a/linux/LibSensors.c b/linux/LibSensors.c
index 9a27fe5..5373416 100644
--- a/linux/LibSensors.c
+++ b/linux/LibSensors.c
@@ -1,6 +1,13 @@
-#include "linux/LibSensors.h"
+/*
+htop - linux/LibSensors.c
+(C) 2020-2023 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
 
-#include "config.h"
+#include "linux/LibSensors.h"
 
 #ifdef HAVE_SENSORS_SENSORS_H
 
@@ -9,14 +16,15 @@
 #include <errno.h>
 #include <limits.h>
 #include <math.h>
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+
 #include <sensors/sensors.h>
 
 #include "Macros.h"
 #include "XUtils.h"
-#include "linux/LinuxProcessList.h"
+#include "linux/LinuxMachine.h"
 
 
 #ifdef BUILD_STATIC
@@ -143,7 +151,8 @@ static int tempDriverPriority(const sensors_chip_name* chip) {
 
 void LibSensors_getCPUTemperatures(CPUData* cpus, unsigned int existingCPUs, unsigned int activeCPUs) {
    assert(existingCPUs > 0 && existingCPUs < 16384);
-   double data[existingCPUs + 1];
+
+   double* data = xMallocArray(existingCPUs + 1, sizeof(double));
    for (size_t i = 0; i < existingCPUs + 1; i++)
       data[i] = NAN;
 
@@ -200,7 +209,7 @@ void LibSensors_getCPUTemperatures(CPUData* cpus, unsigned int existingCPUs, uns
             continue;
 
          /* If already set, e.g. Ryzen reporting platform temperature for each die, use the bigger one */
-         if (isnan(data[tempID])) {
+         if (isNaN(data[tempID])) {
             data[tempID] = temp;
             if (tempID > 0)
                coreTempCount++;
@@ -220,7 +229,7 @@ void LibSensors_getCPUTemperatures(CPUData* cpus, unsigned int existingCPUs, uns
    }
 
    /* Only package temperature - copy to all cores */
-   if (coreTempCount == 0 && !isnan(data[0])) {
+   if (coreTempCount == 0 && !isNaN(data[0])) {
       for (unsigned int i = 1; i <= existingCPUs; i++)
          data[i] = data[0];
 
@@ -229,22 +238,20 @@ void LibSensors_getCPUTemperatures(CPUData* cpus, unsigned int existingCPUs, uns
    }
 
    /* No package temperature - set to max core temperature */
-   if (isnan(data[0]) && coreTempCount != 0) {
-      double maxTemp = NAN;
+   if (coreTempCount > 0 && isNaN(data[0])) {
+      double maxTemp = -HUGE_VAL;
       for (unsigned int i = 1; i <= existingCPUs; i++) {
-         if (isnan(data[i]))
-            continue;
-
-         maxTemp = MAXIMUM(maxTemp, data[i]);
+         if (isgreater(data[i], maxTemp)) {
+            maxTemp = data[i];
+            data[0] = data[i];
+         }
       }
 
-      data[0] = maxTemp;
-
       /* Check for further adjustments */
    }
 
    /* Only temperature for core 0, maybe Ryzen - copy to all other cores */
-   if (coreTempCount == 1 && !isnan(data[1])) {
+   if (coreTempCount == 1 && !isNaN(data[1])) {
       for (unsigned int i = 2; i <= existingCPUs; i++)
          data[i] = data[1];
 
@@ -264,6 +271,8 @@ void LibSensors_getCPUTemperatures(CPUData* cpus, unsigned int existingCPUs, uns
 out:
    for (unsigned int i = 0; i <= existingCPUs; i++)
       cpus[i].temperature = data[i];
+
+   free(data);
 }
 
 #endif /* HAVE_SENSORS_SENSORS_H */
diff --git a/linux/LibSensors.h b/linux/LibSensors.h
index aa89979..6f05448 100644
--- a/linux/LibSensors.h
+++ b/linux/LibSensors.h
@@ -1,7 +1,13 @@
 #ifndef HEADER_LibSensors
 #define HEADER_LibSensors
+/*
+htop - linux/LibSensors.h
+(C) 2020-2023 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
 
-#include "linux/LinuxProcessList.h"
+#include "linux/LinuxMachine.h"
 
 
 int LibSensors_init(void);
diff --git a/linux/LinuxMachine.c b/linux/LinuxMachine.c
new file mode 100644
index 0000000..ae2930d
--- /dev/null
+++ b/linux/LinuxMachine.c
@@ -0,0 +1,695 @@
+/*
+htop - LinuxMachine.c
+(C) 2014 Hisham H. Muhammad
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include "linux/LinuxMachine.h"
+
+#include <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <math.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <time.h>
+
+#include "Compat.h"
+#include "CRT.h"
+#include "Macros.h"
+#include "ProcessTable.h"
+#include "Row.h"
+#include "Settings.h"
+#include "UsersTable.h"
+#include "XUtils.h"
+
+#include "linux/Platform.h" // needed for GNU/hurd to get PATH_MAX  // IWYU pragma: keep
+
+#ifdef HAVE_SENSORS_SENSORS_H
+#include "LibSensors.h"
+#endif
+
+#ifndef O_PATH
+#define O_PATH         010000000 // declare for ancient glibc versions
+#endif
+
+/* Similar to get_nprocs_conf(3) / _SC_NPROCESSORS_CONF
+ * https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/getsysstats.c;hb=HEAD
+ */
+static void LinuxMachine_updateCPUcount(LinuxMachine* this) {
+   unsigned int existing = 0, active = 0;
+   Machine* super = &this->super;
+
+   // Initialize the cpuData array before anything else.
+   if (!this->cpuData) {
+      this->cpuData = xCalloc(2, sizeof(CPUData));
+      this->cpuData[0].online = true; /* average is always "online" */
+      this->cpuData[1].online = true;
+      super->activeCPUs = 1;
+      super->existingCPUs = 1;
+   }
+
+   DIR* dir = opendir("/sys/devices/system/cpu");
+   if (!dir)
+      return;
+
+   unsigned int currExisting = super->existingCPUs;
+
+   const struct dirent* entry;
+   while ((entry = readdir(dir)) != NULL) {
+      if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN)
+         continue;
+
+      if (!String_startsWith(entry->d_name, "cpu"))
+         continue;
+
+      char* endp;
+      unsigned long int id = strtoul(entry->d_name + 3, &endp, 10);
+      if (id == ULONG_MAX || endp == entry->d_name + 3 || *endp != '\0')
+         continue;
+
+#ifdef HAVE_OPENAT
+      int cpuDirFd = openat(dirfd(dir), entry->d_name, O_DIRECTORY | O_PATH | O_NOFOLLOW);
+      if (cpuDirFd < 0)
+         continue;
+#else
+      char cpuDirFd[4096];
+      xSnprintf(cpuDirFd, sizeof(cpuDirFd), "/sys/devices/system/cpu/%s", entry->d_name);
+#endif
+
+      existing++;
+
+      /* readdir() iterates with no specific order */
+      unsigned int max = MAXIMUM(existing, id + 1);
+      if (max > currExisting) {
+         this->cpuData = xReallocArrayZero(this->cpuData, currExisting ? (currExisting + 1) : 0, max + /* aggregate */ 1, sizeof(CPUData));
+         this->cpuData[0].online = true; /* average is always "online" */
+         currExisting = max;
+      }
+
+      char buffer[8];
+      ssize_t res = xReadfileat(cpuDirFd, "online", buffer, sizeof(buffer));
+      /* If the file "online" does not exist or on failure count as active */
+      if (res < 1 || buffer[0] != '0') {
+         active++;
+         this->cpuData[id + 1].online = true;
+      } else {
+         this->cpuData[id + 1].online = false;
+      }
+
+      Compat_openatArgClose(cpuDirFd);
+   }
+
+   closedir(dir);
+
+   // return if no CPU is found
+   if (existing < 1)
+      return;
+
+#ifdef HAVE_SENSORS_SENSORS_H
+   /* When started with offline CPUs, libsensors does not monitor those,
+    * even when they become online. */
+   if (super->existingCPUs != 0 && (active > super->activeCPUs || currExisting > super->existingCPUs))
+      LibSensors_reload();
+#endif
+
+   super->activeCPUs = active;
+   assert(existing == currExisting);
+   super->existingCPUs = currExisting;
+}
+
+static void LinuxMachine_scanMemoryInfo(LinuxMachine* this) {
+   Machine* host = &this->super;
+   memory_t availableMem = 0;
+   memory_t freeMem = 0;
+   memory_t totalMem = 0;
+   memory_t buffersMem = 0;
+   memory_t cachedMem = 0;
+   memory_t sharedMem = 0;
+   memory_t swapTotalMem = 0;
+   memory_t swapCacheMem = 0;
+   memory_t swapFreeMem = 0;
+   memory_t sreclaimableMem = 0;
+   memory_t zswapCompMem = 0;
+   memory_t zswapOrigMem = 0;
+
+   FILE* file = fopen(PROCMEMINFOFILE, "r");
+   if (!file)
+      CRT_fatalError("Cannot open " PROCMEMINFOFILE);
+
+   char buffer[128];
+   while (fgets(buffer, sizeof(buffer), file)) {
+
+      #define tryRead(label, variable)                                       \
+         if (String_startsWith(buffer, label)) {                             \
+            memory_t parsed_;                                                \
+            if (sscanf(buffer + strlen(label), "%llu kB", &parsed_) == 1) {  \
+               (variable) = parsed_;                                         \
+            }                                                                \
+            break;                                                           \
+         } else (void) 0 /* Require a ";" after the macro use. */
+
+      switch (buffer[0]) {
+         case 'M':
+            tryRead("MemAvailable:", availableMem);
+            tryRead("MemFree:", freeMem);
+            tryRead("MemTotal:", totalMem);
+            break;
+         case 'B':
+            tryRead("Buffers:", buffersMem);
+            break;
+         case 'C':
+            tryRead("Cached:", cachedMem);
+            break;
+         case 'S':
+            switch (buffer[1]) {
+               case 'h':
+                  tryRead("Shmem:", sharedMem);
+                  break;
+               case 'w':
+                  tryRead("SwapTotal:", swapTotalMem);
+                  tryRead("SwapCached:", swapCacheMem);
+                  tryRead("SwapFree:", swapFreeMem);
+                  break;
+               case 'R':
+                  tryRead("SReclaimable:", sreclaimableMem);
+                  break;
+            }
+            break;
+         case 'Z':
+            tryRead("Zswap:", zswapCompMem);
+            tryRead("Zswapped:", zswapOrigMem);
+            break;
+      }
+
+      #undef tryRead
+   }
+
+   fclose(file);
+
+   /*
+    * Compute memory partition like procps(free)
+    *  https://gitlab.com/procps-ng/procps/-/blob/master/proc/sysinfo.c
+    *
+    * Adjustments:
+    *  - Shmem in part of Cached (see https://lore.kernel.org/patchwork/patch/648763/),
+    *    do not show twice by subtracting from Cached and do not subtract twice from used.
+    */
+   host->totalMem = totalMem;
+   host->cachedMem = cachedMem + sreclaimableMem - sharedMem;
+   host->sharedMem = sharedMem;
+   const memory_t usedDiff = freeMem + cachedMem + sreclaimableMem + buffersMem;
+   host->usedMem = (totalMem >= usedDiff) ? totalMem - usedDiff : totalMem - freeMem;
+   host->buffersMem = buffersMem;
+   host->availableMem = availableMem != 0 ? MINIMUM(availableMem, totalMem) : freeMem;
+   host->totalSwap = swapTotalMem;
+   host->usedSwap = swapTotalMem - swapFreeMem - swapCacheMem;
+   host->cachedSwap = swapCacheMem;
+   this->zswap.usedZswapComp = zswapCompMem;
+   this->zswap.usedZswapOrig = zswapOrigMem;
+}
+
+static void LinuxMachine_scanHugePages(LinuxMachine* this) {
+   this->totalHugePageMem = 0;
+   for (unsigned i = 0; i < HTOP_HUGEPAGE_COUNT; i++) {
+      this->usedHugePageMem[i] = MEMORY_MAX;
+   }
+
+   DIR* dir = opendir("/sys/kernel/mm/hugepages");
+   if (!dir)
+      return;
+
+   const struct dirent* entry;
+   while ((entry = readdir(dir)) != NULL) {
+      const char* name = entry->d_name;
+
+      /* Ignore all non-directories */
+      if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN)
+         continue;
+
+      if (!String_startsWith(name, "hugepages-"))
+         continue;
+
+      char* endptr;
+      unsigned long int hugePageSize = strtoul(name + strlen("hugepages-"), &endptr, 10);
+      if (!endptr || *endptr != 'k')
+         continue;
+
+      char content[64];
+      char hugePagePath[128];
+      ssize_t r;
+
+      xSnprintf(hugePagePath, sizeof(hugePagePath), "/sys/kernel/mm/hugepages/%s/nr_hugepages", name);
+      r = xReadfile(hugePagePath, content, sizeof(content));
+      if (r <= 0)
+         continue;
+
+      memory_t total = strtoull(content, NULL, 10);
+      if (total == 0)
+         continue;
+
+      xSnprintf(hugePagePath, sizeof(hugePagePath), "/sys/kernel/mm/hugepages/%s/free_hugepages", name);
+      r = xReadfile(hugePagePath, content, sizeof(content));
+      if (r <= 0)
+         continue;
+
+      memory_t free = strtoull(content, NULL, 10);
+
+      int shift = ffsl(hugePageSize) - 1 - (HTOP_HUGEPAGE_BASE_SHIFT - 10);
+      assert(shift >= 0 && shift < HTOP_HUGEPAGE_COUNT);
+
+      this->totalHugePageMem += total * hugePageSize;
+      this->usedHugePageMem[shift] = (total - free) * hugePageSize;
+   }
+
+   closedir(dir);
+}
+
+static void LinuxMachine_scanZramInfo(LinuxMachine* this) {
+   memory_t totalZram = 0;
+   memory_t usedZramComp = 0;
+   memory_t usedZramOrig = 0;
+
+   char mm_stat[34];
+   char disksize[34];
+
+   unsigned int i = 0;
+   for (;;) {
+      xSnprintf(mm_stat, sizeof(mm_stat), "/sys/block/zram%u/mm_stat", i);
+      xSnprintf(disksize, sizeof(disksize), "/sys/block/zram%u/disksize", i);
+      i++;
+      FILE* disksize_file = fopen(disksize, "r");
+      FILE* mm_stat_file = fopen(mm_stat, "r");
+      if (disksize_file == NULL || mm_stat_file == NULL) {
+         if (disksize_file) {
+            fclose(disksize_file);
+         }
+         if (mm_stat_file) {
+            fclose(mm_stat_file);
+         }
+         break;
+      }
+      memory_t size = 0;
+      memory_t orig_data_size = 0;
+      memory_t compr_data_size = 0;
+
+      if (!fscanf(disksize_file, "%llu\n", &size) ||
+          !fscanf(mm_stat_file, "    %llu       %llu", &orig_data_size, &compr_data_size)) {
+         fclose(disksize_file);
+         fclose(mm_stat_file);
+         break;
+      }
+
+      totalZram += size;
+      usedZramComp += compr_data_size;
+      usedZramOrig += orig_data_size;
+
+      fclose(disksize_file);
+      fclose(mm_stat_file);
+   }
+
+   this->zram.totalZram = totalZram / 1024;
+   this->zram.usedZramComp = usedZramComp / 1024;
+   this->zram.usedZramOrig = usedZramOrig / 1024;
+   if (this->zram.usedZramComp > this->zram.usedZramOrig) {
+      this->zram.usedZramComp = this->zram.usedZramOrig;
+   }
+}
+
+static void LinuxMachine_scanZfsArcstats(LinuxMachine* this) {
+   memory_t dbufSize = 0;
+   memory_t dnodeSize = 0;
+   memory_t bonusSize = 0;
+
+   FILE* file = fopen(PROCARCSTATSFILE, "r");
+   if (file == NULL) {
+      this->zfs.enabled = 0;
+      return;
+   }
+   char buffer[128];
+   while (fgets(buffer, 128, file)) {
+      #define tryRead(label, variable)                                         \
+         if (String_startsWith(buffer, label)) {                               \
+            sscanf(buffer + strlen(label), " %*2u %32llu", variable);          \
+            break;                                                             \
+         } else (void) 0 /* Require a ";" after the macro use. */
+      #define tryReadFlag(label, variable, flag)                               \
+         if (String_startsWith(buffer, label)) {                               \
+            (flag) = sscanf(buffer + strlen(label), " %*2u %32llu", variable); \
+            break;                                                             \
+         } else (void) 0 /* Require a ";" after the macro use. */
+
+      switch (buffer[0]) {
+         case 'c':
+            tryRead("c_min", &this->zfs.min);
+            tryRead("c_max", &this->zfs.max);
+            tryReadFlag("compressed_size", &this->zfs.compressed, this->zfs.isCompressed);
+            break;
+         case 'u':
+            tryRead("uncompressed_size", &this->zfs.uncompressed);
+            break;
+         case 's':
+            tryRead("size", &this->zfs.size);
+            break;
+         case 'h':
+            tryRead("hdr_size", &this->zfs.header);
+            break;
+         case 'd':
+            tryRead("dbuf_size", &dbufSize);
+            tryRead("dnode_size", &dnodeSize);
+            break;
+         case 'b':
+            tryRead("bonus_size", &bonusSize);
+            break;
+         case 'a':
+            tryRead("anon_size", &this->zfs.anon);
+            break;
+         case 'm':
+            tryRead("mfu_size", &this->zfs.MFU);
+            tryRead("mru_size", &this->zfs.MRU);
+            break;
+      }
+
+      #undef tryRead
+      #undef tryReadFlag
+   }
+   fclose(file);
+
+   this->zfs.enabled = (this->zfs.size > 0 ? 1 : 0);
+   this->zfs.size   /= 1024;
+   this->zfs.min    /= 1024;
+   this->zfs.max    /= 1024;
+   this->zfs.MFU    /= 1024;
+   this->zfs.MRU    /= 1024;
+   this->zfs.anon   /= 1024;
+   this->zfs.header /= 1024;
+   this->zfs.other   = (dbufSize + dnodeSize + bonusSize) / 1024;
+   if ( this->zfs.isCompressed ) {
+      this->zfs.compressed /= 1024;
+      this->zfs.uncompressed /= 1024;
+   }
+}
+
+static void LinuxMachine_scanCPUTime(LinuxMachine* this) {
+   const Machine* super = &this->super;
+
+   LinuxMachine_updateCPUcount(this);
+
+   FILE* file = fopen(PROCSTATFILE, "r");
+   if (!file)
+      CRT_fatalError("Cannot open " PROCSTATFILE);
+
+   unsigned int lastAdjCpuId = 0;
+
+   for (unsigned int i = 0; i <= super->existingCPUs; i++) {
+      char buffer[PROC_LINE_LENGTH + 1];
+      unsigned long long int usertime, nicetime, systemtime, idletime;
+      unsigned long long int ioWait = 0, irq = 0, softIrq = 0, steal = 0, guest = 0, guestnice = 0;
+
+      const char* ok = fgets(buffer, sizeof(buffer), file);
+      if (!ok)
+         break;
+
+      // cpu fields are sorted first
+      if (!String_startsWith(buffer, "cpu"))
+         break;
+
+      // Depending on your kernel version,
+      // 5, 7, 8 or 9 of these fields will be set.
+      // The rest will remain at zero.
+      unsigned int adjCpuId;
+      if (i == 0) {
+         (void) sscanf(buffer, "cpu  %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice);
+         adjCpuId = 0;
+      } else {
+         unsigned int cpuid;
+         (void) sscanf(buffer, "cpu%4u %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &cpuid, &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice);
+         adjCpuId = cpuid + 1;
+      }
+
+      if (adjCpuId > super->existingCPUs)
+         break;
+
+      for (unsigned int j = lastAdjCpuId + 1; j < adjCpuId; j++) {
+         // Skipped an ID, but /proc/stat is ordered => got offline CPU
+         memset(&(this->cpuData[j]), '\0', sizeof(CPUData));
+      }
+      lastAdjCpuId = adjCpuId;
+
+      // Guest time is already accounted in usertime
+      usertime -= guest;
+      nicetime -= guestnice;
+      // Fields existing on kernels >= 2.6
+      // (and RHEL's patched kernel 2.4...)
+      unsigned long long int idlealltime = idletime + ioWait;
+      unsigned long long int systemalltime = systemtime + irq + softIrq;
+      unsigned long long int virtalltime = guest + guestnice;
+      unsigned long long int totaltime = usertime + nicetime + systemalltime + idlealltime + steal + virtalltime;
+      CPUData* cpuData = &(this->cpuData[adjCpuId]);
+      // Since we do a subtraction (usertime - guest) and cputime64_to_clock_t()
+      // used in /proc/stat rounds down numbers, it can lead to a case where the
+      // integer overflow.
+      cpuData->userPeriod = saturatingSub(usertime, cpuData->userTime);
+      cpuData->nicePeriod = saturatingSub(nicetime, cpuData->niceTime);
+      cpuData->systemPeriod = saturatingSub(systemtime, cpuData->systemTime);
+      cpuData->systemAllPeriod = saturatingSub(systemalltime, cpuData->systemAllTime);
+      cpuData->idleAllPeriod = saturatingSub(idlealltime, cpuData->idleAllTime);
+      cpuData->idlePeriod = saturatingSub(idletime, cpuData->idleTime);
+      cpuData->ioWaitPeriod = saturatingSub(ioWait, cpuData->ioWaitTime);
+      cpuData->irqPeriod = saturatingSub(irq, cpuData->irqTime);
+      cpuData->softIrqPeriod = saturatingSub(softIrq, cpuData->softIrqTime);
+      cpuData->stealPeriod = saturatingSub(steal, cpuData->stealTime);
+      cpuData->guestPeriod = saturatingSub(virtalltime, cpuData->guestTime);
+      cpuData->totalPeriod = saturatingSub(totaltime, cpuData->totalTime);
+      cpuData->userTime = usertime;
+      cpuData->niceTime = nicetime;
+      cpuData->systemTime = systemtime;
+      cpuData->systemAllTime = systemalltime;
+      cpuData->idleAllTime = idlealltime;
+      cpuData->idleTime = idletime;
+      cpuData->ioWaitTime = ioWait;
+      cpuData->irqTime = irq;
+      cpuData->softIrqTime = softIrq;
+      cpuData->stealTime = steal;
+      cpuData->guestTime = virtalltime;
+      cpuData->totalTime = totaltime;
+   }
+
+   this->period = (double)this->cpuData[0].totalPeriod / super->activeCPUs;
+
+   char buffer[PROC_LINE_LENGTH + 1];
+   while (fgets(buffer, sizeof(buffer), file)) {
+      if (String_startsWith(buffer, "procs_running")) {
+         ProcessTable* pt = (ProcessTable*) super->processTable;
+         pt->runningTasks = strtoul(buffer + strlen("procs_running"), NULL, 10);
+         break;
+      }
+   }
+
+   fclose(file);
+}
+
+static int scanCPUFrequencyFromSysCPUFreq(LinuxMachine* this) {
+   const Machine* super = &this->super;
+   int numCPUsWithFrequency = 0;
+   unsigned long totalFrequency = 0;
+
+   /*
+    * On some AMD and Intel CPUs read()ing scaling_cur_freq is quite slow (> 1ms). This delay
+    * accumulates for every core. For details see issue#471.
+    * If the read on CPU 0 takes longer than 500us bail out and fall back to reading the
+    * frequencies from /proc/cpuinfo.
+    * Once the condition has been met, bail out early for the next couple of scans.
+    */
+   static int timeout = 0;
+
+   if (timeout > 0) {
+      timeout--;
+      return -1;
+   }
+
+   for (unsigned int i = 0; i < super->existingCPUs; ++i) {
+      if (!Machine_isCPUonline(super, i))
+         continue;
+
+      char pathBuffer[64];
+      xSnprintf(pathBuffer, sizeof(pathBuffer), "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_cur_freq", i);
+
+      struct timespec start;
+      if (i == 0)
+         clock_gettime(CLOCK_MONOTONIC, &start);
+
+      FILE* file = fopen(pathBuffer, "r");
+      if (!file)
+         return -errno;
+
+      unsigned long frequency;
+      if (fscanf(file, "%lu", &frequency) == 1) {
+         /* convert kHz to MHz */
+         frequency = frequency / 1000;
+         this->cpuData[i + 1].frequency = frequency;
+         numCPUsWithFrequency++;
+         totalFrequency += frequency;
+      }
+
+      fclose(file);
+
+      if (i == 0) {
+         struct timespec end;
+         clock_gettime(CLOCK_MONOTONIC, &end);
+         const time_t timeTakenUs = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_nsec - start.tv_nsec) / 1000;
+         if (timeTakenUs > 500) {
+            timeout = 30;
+            return -1;
+         }
+      }
+   }
+
+   if (numCPUsWithFrequency > 0)
+      this->cpuData[0].frequency = (double)totalFrequency / numCPUsWithFrequency;
+
+   return 0;
+}
+
+static void scanCPUFrequencyFromCPUinfo(LinuxMachine* this) {
+   const Machine* super = &this->super;
+
+   FILE* file = fopen(PROCCPUINFOFILE, "r");
+   if (file == NULL)
+      return;
+
+   int numCPUsWithFrequency = 0;
+   double totalFrequency = 0;
+   int cpuid = -1;
+
+   while (!feof(file)) {
+      double frequency;
+      char buffer[PROC_LINE_LENGTH];
+
+      if (fgets(buffer, PROC_LINE_LENGTH, file) == NULL)
+         break;
+
+      if (sscanf(buffer, "processor : %d", &cpuid) == 1) {
+         continue;
+      } else if (
+         (sscanf(buffer, "cpu MHz : %lf", &frequency) == 1) ||
+         (sscanf(buffer, "clock : %lfMHz", &frequency) == 1)
+      ) {
+         if (cpuid < 0 || (unsigned int)cpuid > (super->existingCPUs - 1)) {
+            continue;
+         }
+
+         CPUData* cpuData = &(this->cpuData[cpuid + 1]);
+         /* do not override sysfs data */
+         if (!isNonnegative(cpuData->frequency)) {
+            cpuData->frequency = frequency;
+         }
+         numCPUsWithFrequency++;
+         totalFrequency += frequency;
+      } else if (buffer[0] == '\n') {
+         cpuid = -1;
+      }
+   }
+   fclose(file);
+
+   if (numCPUsWithFrequency > 0) {
+      this->cpuData[0].frequency = totalFrequency / numCPUsWithFrequency;
+   }
+}
+
+static void LinuxMachine_scanCPUFrequency(LinuxMachine* this) {
+   const Machine* super = &this->super;
+
+   for (unsigned int i = 0; i <= super->existingCPUs; i++)
+      this->cpuData[i].frequency = NAN;
+
+   if (scanCPUFrequencyFromSysCPUFreq(this) == 0)
+      return;
+
+   scanCPUFrequencyFromCPUinfo(this);
+}
+
+void Machine_scan(Machine* super) {
+   LinuxMachine* this = (LinuxMachine*) super;
+
+   LinuxMachine_scanMemoryInfo(this);
+   LinuxMachine_scanHugePages(this);
+   LinuxMachine_scanZfsArcstats(this);
+   LinuxMachine_scanZramInfo(this);
+   LinuxMachine_scanCPUTime(this);
+
+   const Settings* settings = super->settings;
+   if (settings->showCPUFrequency)
+      LinuxMachine_scanCPUFrequency(this);
+
+   #ifdef HAVE_SENSORS_SENSORS_H
+   if (settings->showCPUTemperature)
+      LibSensors_getCPUTemperatures(this->cpuData, super->existingCPUs, super->activeCPUs);
+   #endif
+}
+
+Machine* Machine_new(UsersTable* usersTable, uid_t userId) {
+   LinuxMachine* this = xCalloc(1, sizeof(LinuxMachine));
+   Machine* super = &this->super;
+
+   Machine_init(super, usersTable, userId);
+
+   // Initialize page size
+   if ((this->pageSize = sysconf(_SC_PAGESIZE)) == -1)
+      CRT_fatalError("Cannot get pagesize by sysconf(_SC_PAGESIZE)");
+   this->pageSizeKB = this->pageSize / ONE_K;
+
+   // Initialize clock ticks
+   if ((this->jiffies = sysconf(_SC_CLK_TCK)) == -1)
+      CRT_fatalError("Cannot get clock ticks by sysconf(_SC_CLK_TCK)");
+
+   // Read btime (the kernel boot time, as number of seconds since the epoch)
+   FILE* statfile = fopen(PROCSTATFILE, "r");
+   if (statfile == NULL)
+      CRT_fatalError("Cannot open " PROCSTATFILE);
+
+   this->boottime = -1;
+
+   while (true) {
+      char buffer[PROC_LINE_LENGTH + 1];
+      if (fgets(buffer, sizeof(buffer), statfile) == NULL)
+         break;
+      if (String_startsWith(buffer, "btime ") == false)
+         continue;
+      if (sscanf(buffer, "btime %lld\n", &this->boottime) == 1)
+         break;
+      CRT_fatalError("Failed to parse btime from " PROCSTATFILE);
+   }
+   fclose(statfile);
+
+   if (this->boottime == -1)
+      CRT_fatalError("No btime in " PROCSTATFILE);
+
+   // Initialize CPU count
+   LinuxMachine_updateCPUcount(this);
+
+   return super;
+}
+
+void Machine_delete(Machine* super) {
+   LinuxMachine* this = (LinuxMachine*) super;
+   Machine_done(super);
+   free(this->cpuData);
+   free(this);
+}
+
+bool Machine_isCPUonline(const Machine* super, unsigned int id) {
+   const LinuxMachine* this = (const LinuxMachine*) super;
+
+   assert(id < super->existingCPUs);
+   return this->cpuData[id + 1].online;
+}
diff --git a/linux/LinuxMachine.h b/linux/LinuxMachine.h
new file mode 100644
index 0000000..309b485
--- /dev/null
+++ b/linux/LinuxMachine.h
@@ -0,0 +1,109 @@
+#ifndef HEADER_LinuxMachine
+#define HEADER_LinuxMachine
+/*
+htop - LinuxMachine.h
+(C) 2014 Hisham H. Muhammad
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include <stdbool.h>
+
+#include "Machine.h"
+#include "linux/ZramStats.h"
+#include "linux/ZswapStats.h"
+#include "zfs/ZfsArcStats.h"
+
+#define HTOP_HUGEPAGE_BASE_SHIFT 16
+#define HTOP_HUGEPAGE_COUNT 24
+
+typedef struct CPUData_ {
+   unsigned long long int totalTime;
+   unsigned long long int userTime;
+   unsigned long long int systemTime;
+   unsigned long long int systemAllTime;
+   unsigned long long int idleAllTime;
+   unsigned long long int idleTime;
+   unsigned long long int niceTime;
+   unsigned long long int ioWaitTime;
+   unsigned long long int irqTime;
+   unsigned long long int softIrqTime;
+   unsigned long long int stealTime;
+   unsigned long long int guestTime;
+
+   unsigned long long int totalPeriod;
+   unsigned long long int userPeriod;
+   unsigned long long int systemPeriod;
+   unsigned long long int systemAllPeriod;
+   unsigned long long int idleAllPeriod;
+   unsigned long long int idlePeriod;
+   unsigned long long int nicePeriod;
+   unsigned long long int ioWaitPeriod;
+   unsigned long long int irqPeriod;
+   unsigned long long int softIrqPeriod;
+   unsigned long long int stealPeriod;
+   unsigned long long int guestPeriod;
+
+   double frequency;
+
+   #ifdef HAVE_SENSORS_SENSORS_H
+   double temperature;
+   #endif
+
+   bool online;
+} CPUData;
+
+typedef struct LinuxMachine_ {
+   Machine super;
+
+   long jiffies;
+   int pageSize;
+   int pageSizeKB;
+
+   /* see Linux kernel source for further detail, fs/proc/stat.c */
+   unsigned int runningTasks;   /* procs_running from /proc/stat */
+   long long boottime;   /* btime field from /proc/stat */
+
+   double period;
+
+   CPUData* cpuData;
+
+   memory_t totalHugePageMem;
+   memory_t usedHugePageMem[HTOP_HUGEPAGE_COUNT];
+
+   memory_t availableMem;
+
+   ZfsArcStats zfs;
+   ZramStats zram;
+   ZswapStats zswap;
+} LinuxMachine;
+
+#ifndef PROCDIR
+#define PROCDIR "/proc"
+#endif
+
+#ifndef PROCCPUINFOFILE
+#define PROCCPUINFOFILE PROCDIR "/cpuinfo"
+#endif
+
+#ifndef PROCSTATFILE
+#define PROCSTATFILE PROCDIR "/stat"
+#endif
+
+#ifndef PROCMEMINFOFILE
+#define PROCMEMINFOFILE PROCDIR "/meminfo"
+#endif
+
+#ifndef PROCARCSTATSFILE
+#define PROCARCSTATSFILE PROCDIR "/spl/kstat/zfs/arcstats"
+#endif
+
+#ifndef PROCTTYDRIVERSFILE
+#define PROCTTYDRIVERSFILE PROCDIR "/tty/drivers"
+#endif
+
+#ifndef PROC_LINE_LENGTH
+#define PROC_LINE_LENGTH 4096
+#endif
+
+#endif
diff --git a/linux/LinuxProcess.c b/linux/LinuxProcess.c
index 92be326..dc4f259 100644
--- a/linux/LinuxProcess.c
+++ b/linux/LinuxProcess.c
@@ -6,9 +6,13 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "linux/LinuxProcess.h"
 
+#include <assert.h>
 #include <math.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <syscall.h>
@@ -19,14 +23,14 @@ in the source distribution for its full text.
 #include "Process.h"
 #include "ProvideCurses.h"
 #include "RichString.h"
+#include "RowField.h"
+#include "Scheduling.h"
+#include "Settings.h"
 #include "XUtils.h"
 #include "linux/IOPriority.h"
+#include "linux/LinuxMachine.h"
 
 
-/* semi-global */
-int pageSize;
-int pageSizeKB;
-
 const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [0] = { .name = "", .title = NULL, .description = NULL, .flags = 0, },
    [PID] = { .name = "PID", .title = "PID", .description = "Process/thread ID", .flags = 0, .pidColumn = true, },
@@ -53,8 +57,9 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, .defaultSortDesc = true, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, .defaultSortDesc = true, },
    [M_SHARE] = { .name = "M_SHARE", .title = "  SHR ", .description = "Size of the process's shared pages", .flags = 0, .defaultSortDesc = true, },
-   [M_TRS] = { .name = "M_TRS", .title = " CODE ", .description = "Size of the text segment of the process", .flags = 0, .defaultSortDesc = true, },
-   [M_DRS] = { .name = "M_DRS", .title = " DATA ", .description = "Size of the data segment plus stack usage of the process", .flags = 0, .defaultSortDesc = true, },
+   [M_PRIV] = { .name = "M_PRIV", .title = " PRIV ", .description = "The private memory size of the process - resident set size minus shared memory", .flags = 0, .defaultSortDesc = true, },
+   [M_TRS] = { .name = "M_TRS", .title = " CODE ", .description = "Size of the .text segment of the process (CODE)", .flags = 0, .defaultSortDesc = true, },
+   [M_DRS] = { .name = "M_DRS", .title = " DATA ", .description = "Size of the .data segment plus stack usage of the process (DATA)", .flags = 0, .defaultSortDesc = true, },
    [M_LRS] = { .name = "M_LRS", .title = "  LIB ", .description = "The library size of the process (calculated from memory maps)", .flags = PROCESS_FLAG_LINUX_LRS_FIX, .defaultSortDesc = true, },
    [ST_UID] = { .name = "ST_UID", .title = "UID", .description = "User ID of the process owner", .flags = 0, },
    [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = " CPU%", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, .defaultSortDesc = true, .autoWidth = true, },
@@ -78,11 +83,12 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [RBYTES] = { .name = "RBYTES", .title = " IO_R ", .description = "Bytes of read(2) I/O for the process", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
    [WBYTES] = { .name = "WBYTES", .title = " IO_W ", .description = "Bytes of write(2) I/O for the process", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
    [CNCLWB] = { .name = "CNCLWB", .title = " IO_C ", .description = "Bytes of cancelled write(2) I/O", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
-   [IO_READ_RATE] = { .name = "IO_READ_RATE", .title = " DISK READ  ", .description = "The I/O rate of read(2) in bytes per second for the process", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
+   [IO_READ_RATE] = { .name = "IO_READ_RATE", .title = "  DISK READ ", .description = "The I/O rate of read(2) in bytes per second for the process", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
    [IO_WRITE_RATE] = { .name = "IO_WRITE_RATE", .title = " DISK WRITE ", .description = "The I/O rate of write(2) in bytes per second for the process", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
    [IO_RATE] = { .name = "IO_RATE", .title = "   DISK R/W ", .description = "Total I/O rate in bytes per second", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
    [CGROUP] = { .name = "CGROUP", .title = "CGROUP (raw)", .description = "Which cgroup the process is in", .flags = PROCESS_FLAG_LINUX_CGROUP, .autoWidth = true, },
    [CCGROUP] = { .name = "CCGROUP", .title = "CGROUP (compressed)", .description = "Which cgroup the process is in (condensed to essentials)", .flags = PROCESS_FLAG_LINUX_CGROUP, .autoWidth = true, },
+   [CONTAINER] = { .name = "CONTAINER", .title = "CONTAINER", .description = "Name of the container the process is in (guessed by heuristics)", .flags = PROCESS_FLAG_LINUX_CGROUP, .autoWidth = true, },
    [OOM] = { .name = "OOM", .title = " OOM ", .description = "OOM (Out-of-Memory) killer score", .flags = PROCESS_FLAG_LINUX_OOM, .defaultSortDesc = true, },
    [IO_PRIORITY] = { .name = "IO_PRIORITY", .title = "IO ", .description = "I/O priority", .flags = PROCESS_FLAG_LINUX_IOPRIO, },
 #ifdef HAVE_DELAYACCT
@@ -100,18 +106,22 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [CWD] = { .name = "CWD", .title = "CWD                       ", .description = "The current working directory of the process", .flags = PROCESS_FLAG_CWD, },
    [AUTOGROUP_ID] = { .name = "AUTOGROUP_ID", .title = "AGRP", .description = "The autogroup identifier of the process", .flags = PROCESS_FLAG_LINUX_AUTOGROUP, },
    [AUTOGROUP_NICE] = { .name = "AUTOGROUP_NICE", .title = " ANI", .description = "Nice value (the higher the value, the more other processes take priority) associated with the process autogroup", .flags = PROCESS_FLAG_LINUX_AUTOGROUP, },
+#ifdef SCHEDULER_SUPPORT
+   [SCHEDULERPOLICY] = { .name = "SCHEDULERPOLICY", .title = "SCHED ", .description = "Current scheduling policy of the process", .flags = PROCESS_FLAG_SCHEDPOL, },
+#endif
 };
 
-Process* LinuxProcess_new(const Settings* settings) {
+Process* LinuxProcess_new(const Machine* host) {
    LinuxProcess* this = xCalloc(1, sizeof(LinuxProcess));
    Object_setClass(this, Class(LinuxProcess));
-   Process_init(&this->super, settings);
+   Process_init(&this->super, host);
    return &this->super;
 }
 
 void Process_delete(Object* cast) {
    LinuxProcess* this = (LinuxProcess*) cast;
    Process_done((Process*)cast);
+   free(this->container_short);
    free(this->cgroup_short);
    free(this->cgroup);
 #ifdef HAVE_OPENVZ
@@ -142,22 +152,29 @@ static int LinuxProcess_effectiveIOPriority(const LinuxProcess* this) {
 #define SYS_ioprio_set __NR_ioprio_set
 #endif
 
-IOPriority LinuxProcess_updateIOPriority(LinuxProcess* this) {
+IOPriority LinuxProcess_updateIOPriority(Process* p) {
    IOPriority ioprio = 0;
 // Other OSes masquerading as Linux (NetBSD?) don't have this syscall
 #ifdef SYS_ioprio_get
-   ioprio = syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, this->super.pid);
+   ioprio = syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, Process_getPid(p));
 #endif
+   LinuxProcess* this = (LinuxProcess*) p;
    this->ioPriority = ioprio;
    return ioprio;
 }
 
-bool LinuxProcess_setIOPriority(Process* this, Arg ioprio) {
+static bool LinuxProcess_setIOPriority(Process* p, Arg ioprio) {
 // Other OSes masquerading as Linux (NetBSD?) don't have this syscall
 #ifdef SYS_ioprio_set
-   syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, this->pid, ioprio.i);
+   syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, Process_getPid(p), ioprio.i);
 #endif
-   return (LinuxProcess_updateIOPriority((LinuxProcess*)this) == ioprio.i);
+   return LinuxProcess_updateIOPriority(p) == ioprio.i;
+}
+
+bool LinuxProcess_rowSetIOPriority(Row* super, Arg ioprio) {
+   Process* p = (Process*) super;
+   assert(Object_isA((const Object*) p, (const ObjectClass*) &Process_class));
+   return LinuxProcess_setIOPriority(p, ioprio);
 }
 
 bool LinuxProcess_isAutogroupEnabled(void) {
@@ -167,9 +184,10 @@ bool LinuxProcess_isAutogroupEnabled(void) {
    return buf[0] == '1';
 }
 
-bool LinuxProcess_changeAutogroupPriorityBy(Process* this, Arg delta) {
+static bool LinuxProcess_changeAutogroupPriorityBy(Process* p, Arg delta) {
    char buffer[256];
-   xSnprintf(buffer, sizeof(buffer), PROCDIR "/%d/autogroup", this->pid);
+   pid_t pid = Process_getPid(p);
+   xSnprintf(buffer, sizeof(buffer), PROCDIR "/%d/autogroup", pid);
 
    FILE* file = fopen(buffer, "r+");
    if (!file)
@@ -178,69 +196,79 @@ bool LinuxProcess_changeAutogroupPriorityBy(Process* this, Arg delta) {
    long int identity;
    int nice;
    int ok = fscanf(file, "/autogroup-%ld nice %d", &identity, &nice);
-   bool success;
-   if (ok == 2) {
-      rewind(file);
+   bool success = false;
+   if (ok == 2 && fseek(file, 0L, SEEK_SET) == 0) {
       xSnprintf(buffer, sizeof(buffer), "%d", nice + delta.i);
       success = fputs(buffer, file) > 0;
-   } else {
-      success = false;
    }
 
    fclose(file);
    return success;
 }
 
-static void LinuxProcess_writeField(const Process* this, RichString* str, ProcessField field) {
-   const LinuxProcess* lp = (const LinuxProcess*) this;
-   bool coloring = this->settings->highlightMegabytes;
+bool LinuxProcess_rowChangeAutogroupPriorityBy(Row* super, Arg delta) {
+   Process* p = (Process*) super;
+   assert(Object_isA((const Object*) p, (const ObjectClass*) &Process_class));
+   return LinuxProcess_changeAutogroupPriorityBy(p, delta);
+}
+
+static double LinuxProcess_totalIORate(const LinuxProcess* lp) {
+   double totalRate = NAN;
+   if (isNonnegative(lp->io_rate_read_bps)) {
+      totalRate = lp->io_rate_read_bps;
+      if (isNonnegative(lp->io_rate_write_bps)) {
+         totalRate += lp->io_rate_write_bps;
+      }
+   } else if (isNonnegative(lp->io_rate_write_bps)) {
+      totalRate = lp->io_rate_write_bps;
+   }
+   return totalRate;
+}
+
+static void LinuxProcess_rowWriteField(const Row* super, RichString* str, ProcessField field) {
+   const Process* this = (const Process*) super;
+   const LinuxProcess* lp = (const LinuxProcess*) super;
+   const Machine* host = (const Machine*) super->host;
+   const LinuxMachine* lhost = (const LinuxMachine*) super->host;
+
+   bool coloring = host->settings->highlightMegabytes;
    char buffer[256]; buffer[255] = '\0';
    int attr = CRT_colors[DEFAULT_COLOR];
    size_t n = sizeof(buffer) - 1;
+
    switch (field) {
-   case CMINFLT: Process_printCount(str, lp->cminflt, coloring); return;
-   case CMAJFLT: Process_printCount(str, lp->cmajflt, coloring); return;
-   case M_DRS: Process_printBytes(str, lp->m_drs * pageSize, coloring); return;
+   case CMINFLT: Row_printCount(str, lp->cminflt, coloring); return;
+   case CMAJFLT: Row_printCount(str, lp->cmajflt, coloring); return;
+   case M_DRS: Row_printBytes(str, lp->m_drs * lhost->pageSize, coloring); return;
    case M_LRS:
       if (lp->m_lrs) {
-         Process_printBytes(str, lp->m_lrs * pageSize, coloring);
+         Row_printBytes(str, lp->m_lrs * lhost->pageSize, coloring);
          return;
       }
 
       attr = CRT_colors[PROCESS_SHADOW];
       xSnprintf(buffer, n, "  N/A ");
       break;
-   case M_TRS: Process_printBytes(str, lp->m_trs * pageSize, coloring); return;
-   case M_SHARE: Process_printBytes(str, lp->m_share * pageSize, coloring); return;
-   case M_PSS: Process_printKBytes(str, lp->m_pss, coloring); return;
-   case M_SWAP: Process_printKBytes(str, lp->m_swap, coloring); return;
-   case M_PSSWP: Process_printKBytes(str, lp->m_psswp, coloring); return;
-   case UTIME: Process_printTime(str, lp->utime, coloring); return;
-   case STIME: Process_printTime(str, lp->stime, coloring); return;
-   case CUTIME: Process_printTime(str, lp->cutime, coloring); return;
-   case CSTIME: Process_printTime(str, lp->cstime, coloring); return;
-   case RCHAR:  Process_printBytes(str, lp->io_rchar, coloring); return;
-   case WCHAR:  Process_printBytes(str, lp->io_wchar, coloring); return;
-   case SYSCR:  Process_printCount(str, lp->io_syscr, coloring); return;
-   case SYSCW:  Process_printCount(str, lp->io_syscw, coloring); return;
-   case RBYTES: Process_printBytes(str, lp->io_read_bytes, coloring); return;
-   case WBYTES: Process_printBytes(str, lp->io_write_bytes, coloring); return;
-   case CNCLWB: Process_printBytes(str, lp->io_cancelled_write_bytes, coloring); return;
-   case IO_READ_RATE:  Process_printRate(str, lp->io_rate_read_bps, coloring); return;
-   case IO_WRITE_RATE: Process_printRate(str, lp->io_rate_write_bps, coloring); return;
-   case IO_RATE: {
-      double totalRate;
-      if (!isnan(lp->io_rate_read_bps) && !isnan(lp->io_rate_write_bps))
-         totalRate = lp->io_rate_read_bps + lp->io_rate_write_bps;
-      else if (!isnan(lp->io_rate_read_bps))
-         totalRate = lp->io_rate_read_bps;
-      else if (!isnan(lp->io_rate_write_bps))
-         totalRate = lp->io_rate_write_bps;
-      else
-         totalRate = NAN;
-      Process_printRate(str, totalRate, coloring);
-      return;
-   }
+   case M_TRS: Row_printBytes(str, lp->m_trs * lhost->pageSize, coloring); return;
+   case M_SHARE: Row_printBytes(str, lp->m_share * lhost->pageSize, coloring); return;
+   case M_PRIV: Row_printKBytes(str, lp->m_priv, coloring); return;
+   case M_PSS: Row_printKBytes(str, lp->m_pss, coloring); return;
+   case M_SWAP: Row_printKBytes(str, lp->m_swap, coloring); return;
+   case M_PSSWP: Row_printKBytes(str, lp->m_psswp, coloring); return;
+   case UTIME: Row_printTime(str, lp->utime, coloring); return;
+   case STIME: Row_printTime(str, lp->stime, coloring); return;
+   case CUTIME: Row_printTime(str, lp->cutime, coloring); return;
+   case CSTIME: Row_printTime(str, lp->cstime, coloring); return;
+   case RCHAR:  Row_printBytes(str, lp->io_rchar, coloring); return;
+   case WCHAR:  Row_printBytes(str, lp->io_wchar, coloring); return;
+   case SYSCR:  Row_printCount(str, lp->io_syscr, coloring); return;
+   case SYSCW:  Row_printCount(str, lp->io_syscw, coloring); return;
+   case RBYTES: Row_printBytes(str, lp->io_read_bytes, coloring); return;
+   case WBYTES: Row_printBytes(str, lp->io_write_bytes, coloring); return;
+   case CNCLWB: Row_printBytes(str, lp->io_cancelled_write_bytes, coloring); return;
+   case IO_READ_RATE:  Row_printRate(str, lp->io_rate_read_bps, coloring); return;
+   case IO_WRITE_RATE: Row_printRate(str, lp->io_rate_write_bps, coloring); return;
+   case IO_RATE: Row_printRate(str, LinuxProcess_totalIORate(lp), coloring); return;
    #ifdef HAVE_OPENVZ
    case CTID: xSnprintf(buffer, n, "%-8s ", lp->ctid ? lp->ctid : ""); break;
    case VPID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, lp->vpid); break;
@@ -248,8 +276,9 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
    #ifdef HAVE_VSERVER
    case VXID: xSnprintf(buffer, n, "%5u ", lp->vxid); break;
    #endif
-   case CGROUP: xSnprintf(buffer, n, "%-*.*s ", Process_fieldWidths[CGROUP], Process_fieldWidths[CGROUP], lp->cgroup ? lp->cgroup : "N/A"); break;
-   case CCGROUP: xSnprintf(buffer, n, "%-*.*s ", Process_fieldWidths[CCGROUP], Process_fieldWidths[CCGROUP], lp->cgroup_short ? lp->cgroup_short : (lp->cgroup ? lp->cgroup : "N/A")); break;
+   case CGROUP: xSnprintf(buffer, n, "%-*.*s ", Row_fieldWidths[CGROUP], Row_fieldWidths[CGROUP], lp->cgroup ? lp->cgroup : "N/A"); break;
+   case CCGROUP: xSnprintf(buffer, n, "%-*.*s ", Row_fieldWidths[CCGROUP], Row_fieldWidths[CCGROUP], lp->cgroup_short ? lp->cgroup_short : (lp->cgroup ? lp->cgroup : "N/A")); break;
+   case CONTAINER: xSnprintf(buffer, n, "%-*.*s ", Row_fieldWidths[CONTAINER], Row_fieldWidths[CONTAINER], lp->container_short ? lp->container_short : "N/A"); break;
    case OOM: xSnprintf(buffer, n, "%4u ", lp->oom); break;
    case IO_PRIORITY: {
       int klass = IOPriority_class(lp->ioPriority);
@@ -270,9 +299,9 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
       break;
    }
    #ifdef HAVE_DELAYACCT
-   case PERCENT_CPU_DELAY: Process_printPercentage(lp->cpu_delay_percent, buffer, n, 5, &attr); break;
-   case PERCENT_IO_DELAY: Process_printPercentage(lp->blkio_delay_percent, buffer, n, 5, &attr); break;
-   case PERCENT_SWAP_DELAY: Process_printPercentage(lp->swapin_delay_percent, buffer, n, 5, &attr); break;
+   case PERCENT_CPU_DELAY: Row_printPercentage(lp->cpu_delay_percent, buffer, n, 5, &attr); break;
+   case PERCENT_IO_DELAY: Row_printPercentage(lp->blkio_delay_percent, buffer, n, 5, &attr); break;
+   case PERCENT_SWAP_DELAY: Row_printPercentage(lp->swapin_delay_percent, buffer, n, 5, &attr); break;
    #endif
    case CTXT:
       if (lp->ctxt_diff > 1000) {
@@ -280,7 +309,7 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
       }
       xSnprintf(buffer, n, "%5lu ", lp->ctxt_diff);
       break;
-   case SECATTR: snprintf(buffer, n, "%-*.*s ", Process_fieldWidths[SECATTR], Process_fieldWidths[SECATTR], lp->secattr ? lp->secattr : "N/A"); break;
+   case SECATTR: snprintf(buffer, n, "%-*.*s ", Row_fieldWidths[SECATTR], Row_fieldWidths[SECATTR], lp->secattr ? lp->secattr : "N/A"); break;
    case AUTOGROUP_ID:
       if (lp->autogroup_id != -1) {
          xSnprintf(buffer, n, "%4ld ", lp->autogroup_id);
@@ -293,8 +322,8 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
       if (lp->autogroup_id != -1) {
          xSnprintf(buffer, n, "%3d ", lp->autogroup_nice);
          attr = lp->autogroup_nice < 0 ? CRT_colors[PROCESS_HIGH_PRIORITY]
-              : lp->autogroup_nice > 0 ? CRT_colors[PROCESS_LOW_PRIORITY]
-              : CRT_colors[PROCESS_SHADOW];
+            : lp->autogroup_nice > 0 ? CRT_colors[PROCESS_LOW_PRIORITY]
+            : CRT_colors[PROCESS_SHADOW];
       } else {
          attr = CRT_colors[PROCESS_SHADOW];
          xSnprintf(buffer, n, "N/A ");
@@ -304,14 +333,8 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
       Process_writeField(this, str, field);
       return;
    }
-   RichString_appendAscii(str, attr, buffer);
-}
 
-static double adjustNaN(double num) {
-   if (isnan(num))
-      return -0.0005;
-
-   return num;
+   RichString_appendAscii(str, attr, buffer);
 }
 
 static int LinuxProcess_compareByKey(const Process* v1, const Process* v2, ProcessField key) {
@@ -327,6 +350,8 @@ static int LinuxProcess_compareByKey(const Process* v1, const Process* v2, Proce
       return SPACESHIP_NUMBER(p1->m_trs, p2->m_trs);
    case M_SHARE:
       return SPACESHIP_NUMBER(p1->m_share, p2->m_share);
+   case M_PRIV:
+      return SPACESHIP_NUMBER(p1->m_priv, p2->m_priv);
    case M_PSS:
       return SPACESHIP_NUMBER(p1->m_pss, p2->m_pss);
    case M_SWAP:
@@ -356,11 +381,11 @@ static int LinuxProcess_compareByKey(const Process* v1, const Process* v2, Proce
    case CNCLWB:
       return SPACESHIP_NUMBER(p1->io_cancelled_write_bytes, p2->io_cancelled_write_bytes);
    case IO_READ_RATE:
-      return SPACESHIP_NUMBER(adjustNaN(p1->io_rate_read_bps), adjustNaN(p2->io_rate_read_bps));
+      return compareRealNumbers(p1->io_rate_read_bps, p2->io_rate_read_bps);
    case IO_WRITE_RATE:
-      return SPACESHIP_NUMBER(adjustNaN(p1->io_rate_write_bps), adjustNaN(p2->io_rate_write_bps));
+      return compareRealNumbers(p1->io_rate_write_bps, p2->io_rate_write_bps);
    case IO_RATE:
-      return SPACESHIP_NUMBER(adjustNaN(p1->io_rate_read_bps) + adjustNaN(p1->io_rate_write_bps), adjustNaN(p2->io_rate_read_bps) + adjustNaN(p2->io_rate_write_bps));
+      return compareRealNumbers(LinuxProcess_totalIORate(p1), LinuxProcess_totalIORate(p2));
    #ifdef HAVE_OPENVZ
    case CTID:
       return SPACESHIP_NULLSTR(p1->ctid, p2->ctid);
@@ -375,15 +400,17 @@ static int LinuxProcess_compareByKey(const Process* v1, const Process* v2, Proce
       return SPACESHIP_NULLSTR(p1->cgroup, p2->cgroup);
    case CCGROUP:
       return SPACESHIP_NULLSTR(p1->cgroup_short, p2->cgroup_short);
+   case CONTAINER:
+      return SPACESHIP_NULLSTR(p1->container_short, p2->container_short);
    case OOM:
       return SPACESHIP_NUMBER(p1->oom, p2->oom);
    #ifdef HAVE_DELAYACCT
    case PERCENT_CPU_DELAY:
-      return SPACESHIP_NUMBER(p1->cpu_delay_percent, p2->cpu_delay_percent);
+      return compareRealNumbers(p1->cpu_delay_percent, p2->cpu_delay_percent);
    case PERCENT_IO_DELAY:
-      return SPACESHIP_NUMBER(p1->blkio_delay_percent, p2->blkio_delay_percent);
+      return compareRealNumbers(p1->blkio_delay_percent, p2->blkio_delay_percent);
    case PERCENT_SWAP_DELAY:
-      return SPACESHIP_NUMBER(p1->swapin_delay_percent, p2->swapin_delay_percent);
+      return compareRealNumbers(p1->swapin_delay_percent, p2->swapin_delay_percent);
    #endif
    case IO_PRIORITY:
       return SPACESHIP_NUMBER(LinuxProcess_effectiveIOPriority(p1), LinuxProcess_effectiveIOPriority(p2));
@@ -402,11 +429,18 @@ static int LinuxProcess_compareByKey(const Process* v1, const Process* v2, Proce
 
 const ProcessClass LinuxProcess_class = {
    .super = {
-      .extends = Class(Process),
-      .display = Process_display,
-      .delete = Process_delete,
-      .compare = Process_compare
+      .super = {
+         .extends = Class(Process),
+         .display = Row_display,
+         .delete = Process_delete,
+         .compare = Process_compare
+      },
+      .isHighlighted = Process_rowIsHighlighted,
+      .isVisible = Process_rowIsVisible,
+      .matchesFilter = Process_rowMatchesFilter,
+      .compareByParent = Process_compareByParent,
+      .sortKeyString = Process_rowGetSortKey,
+      .writeField = LinuxProcess_rowWriteField
    },
-   .writeField = LinuxProcess_writeField,
    .compareByKey = LinuxProcess_compareByKey
 };
diff --git a/linux/LinuxProcess.h b/linux/LinuxProcess.h
index 3e5d380..388e50d 100644
--- a/linux/LinuxProcess.h
+++ b/linux/LinuxProcess.h
@@ -8,15 +8,14 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include "config.h" // IWYU pragma: keep
-
 #include <stdbool.h>
-#include <sys/types.h>
 
-#include "linux/IOPriority.h"
+#include "Machine.h"
 #include "Object.h"
 #include "Process.h"
-#include "Settings.h"
+#include "Row.h"
+
+#include "linux/IOPriority.h"
 
 
 #define PROCESS_FLAG_LINUX_IOPRIO    0x00000100
@@ -41,6 +40,7 @@ typedef struct LinuxProcess_ {
    unsigned long long int cutime;
    unsigned long long int cstime;
    long m_share;
+   long m_priv;
    long m_pss;
    long m_swap;
    long m_psswp;
@@ -90,6 +90,7 @@ typedef struct LinuxProcess_ {
    #endif
    char* cgroup;
    char* cgroup_short;
+   char* container_short;
    unsigned int oom;
    #ifdef HAVE_DELAYACCT
    unsigned long long int delay_read_time;
@@ -118,17 +119,17 @@ extern const ProcessFieldData Process_fields[LAST_PROCESSFIELD];
 
 extern const ProcessClass LinuxProcess_class;
 
-Process* LinuxProcess_new(const Settings* settings);
+Process* LinuxProcess_new(const Machine* host);
 
 void Process_delete(Object* cast);
 
-IOPriority LinuxProcess_updateIOPriority(LinuxProcess* this);
+IOPriority LinuxProcess_updateIOPriority(Process* proc);
 
-bool LinuxProcess_setIOPriority(Process* this, Arg ioprio);
+bool LinuxProcess_rowSetIOPriority(Row* super, Arg ioprio);
 
 bool LinuxProcess_isAutogroupEnabled(void);
 
-bool LinuxProcess_changeAutogroupPriorityBy(Process* this, Arg delta);
+bool LinuxProcess_rowChangeAutogroupPriorityBy(Row* super, Arg delta);
 
 bool Process_isThread(const Process* this);
 
diff --git a/linux/LinuxProcessList.c b/linux/LinuxProcessList.c
deleted file mode 100644
index 45b045c..0000000
--- a/linux/LinuxProcessList.c
+++ /dev/null
@@ -1,2249 +0,0 @@
-/*
-htop - LinuxProcessList.c
-(C) 2014 Hisham H. Muhammad
-Released under the GNU GPLv2+, see the COPYING file
-in the source distribution for its full text.
-*/
-
-#include "config.h" // IWYU pragma: keep
-
-#include "linux/LinuxProcessList.h"
-
-#include <assert.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <math.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <strings.h>
-#include <time.h>
-#include <unistd.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#ifdef HAVE_DELAYACCT
-#include <linux/netlink.h>
-#include <linux/taskstats.h>
-#include <netlink/attr.h>
-#include <netlink/handlers.h>
-#include <netlink/msg.h>
-#include <netlink/netlink.h>
-#include <netlink/socket.h>
-#include <netlink/genl/genl.h>
-#include <netlink/genl/ctrl.h>
-#endif
-
-#include "Compat.h"
-#include "CRT.h"
-#include "Macros.h"
-#include "Object.h"
-#include "Process.h"
-#include "Settings.h"
-#include "XUtils.h"
-#include "linux/CGroupUtils.h"
-#include "linux/LinuxProcess.h"
-#include "linux/Platform.h" // needed for GNU/hurd to get PATH_MAX  // IWYU pragma: keep
-
-#if defined(MAJOR_IN_MKDEV)
-#include <sys/mkdev.h>
-#elif defined(MAJOR_IN_SYSMACROS)
-#include <sys/sysmacros.h>
-#endif
-
-#ifdef HAVE_SENSORS_SENSORS_H
-#include "LibSensors.h"
-#endif
-
-#ifndef O_PATH
-#define O_PATH         010000000 // declare for ancient glibc versions
-#endif
-
-/* Not exposed yet. Defined at include/linux/sched.h */
-#ifndef PF_KTHREAD
-#define PF_KTHREAD 0x00200000
-#endif
-
-static long long btime = -1;
-
-static long jiffy;
-
-static FILE* fopenat(openat_arg_t openatArg, const char* pathname, const char* mode) {
-   assert(String_eq(mode, "r")); /* only currently supported mode */
-
-   int fd = Compat_openat(openatArg, pathname, O_RDONLY);
-   if (fd < 0)
-      return NULL;
-
-   FILE* stream = fdopen(fd, mode);
-   if (!stream)
-      close(fd);
-
-   return stream;
-}
-
-static int sortTtyDrivers(const void* va, const void* vb) {
-   const TtyDriver* a = (const TtyDriver*) va;
-   const TtyDriver* b = (const TtyDriver*) vb;
-
-   int r = SPACESHIP_NUMBER(a->major, b->major);
-   if (r)
-      return r;
-
-   return SPACESHIP_NUMBER(a->minorFrom, b->minorFrom);
-}
-
-static void LinuxProcessList_initTtyDrivers(LinuxProcessList* this) {
-   TtyDriver* ttyDrivers;
-
-   char buf[16384];
-   ssize_t r = xReadfile(PROCTTYDRIVERSFILE, buf, sizeof(buf));
-   if (r < 0)
-      return;
-
-   int numDrivers = 0;
-   int allocd = 10;
-   ttyDrivers = xMallocArray(allocd, sizeof(TtyDriver));
-   char* at = buf;
-   while (*at != '\0') {
-      at = strchr(at, ' ');    // skip first token
-      while (*at == ' ') at++; // skip spaces
-      const char* token = at;  // mark beginning of path
-      at = strchr(at, ' ');    // find end of path
-      *at = '\0'; at++;        // clear and skip
-      ttyDrivers[numDrivers].path = xStrdup(token); // save
-      while (*at == ' ') at++; // skip spaces
-      token = at;              // mark beginning of major
-      at = strchr(at, ' ');    // find end of major
-      *at = '\0'; at++;        // clear and skip
-      ttyDrivers[numDrivers].major = atoi(token); // save
-      while (*at == ' ') at++; // skip spaces
-      token = at;              // mark beginning of minorFrom
-      while (*at >= '0' && *at <= '9') at++; //find end of minorFrom
-      if (*at == '-') {        // if has range
-         *at = '\0'; at++;        // clear and skip
-         ttyDrivers[numDrivers].minorFrom = atoi(token); // save
-         token = at;              // mark beginning of minorTo
-         at = strchr(at, ' ');    // find end of minorTo
-         *at = '\0'; at++;        // clear and skip
-         ttyDrivers[numDrivers].minorTo = atoi(token); // save
-      } else {                 // no range
-         *at = '\0'; at++;        // clear and skip
-         ttyDrivers[numDrivers].minorFrom = atoi(token); // save
-         ttyDrivers[numDrivers].minorTo = atoi(token); // save
-      }
-      at = strchr(at, '\n');   // go to end of line
-      at++;                    // skip
-      numDrivers++;
-      if (numDrivers == allocd) {
-         allocd += 10;
-         ttyDrivers = xReallocArray(ttyDrivers, allocd, sizeof(TtyDriver));
-      }
-   }
-   numDrivers++;
-   ttyDrivers = xRealloc(ttyDrivers, sizeof(TtyDriver) * numDrivers);
-   ttyDrivers[numDrivers - 1].path = NULL;
-   qsort(ttyDrivers, numDrivers - 1, sizeof(TtyDriver), sortTtyDrivers);
-   this->ttyDrivers = ttyDrivers;
-}
-
-#ifdef HAVE_DELAYACCT
-
-static void LinuxProcessList_initNetlinkSocket(LinuxProcessList* this) {
-   this->netlink_socket = nl_socket_alloc();
-   if (this->netlink_socket == NULL) {
-      return;
-   }
-   if (nl_connect(this->netlink_socket, NETLINK_GENERIC) < 0) {
-      return;
-   }
-   this->netlink_family = genl_ctrl_resolve(this->netlink_socket, TASKSTATS_GENL_NAME);
-}
-
-#endif
-
-static unsigned int scanAvailableCPUsFromCPUinfo(LinuxProcessList* this) {
-   FILE* file = fopen(PROCCPUINFOFILE, "r");
-   if (file == NULL)
-      return this->super.existingCPUs;
-
-   unsigned int availableCPUs = 0;
-
-   while (!feof(file)) {
-      char buffer[PROC_LINE_LENGTH];
-
-      if (fgets(buffer, PROC_LINE_LENGTH, file) == NULL)
-         break;
-
-      if (String_startsWith(buffer, "processor"))
-         availableCPUs++;
-      }
-
-   fclose(file);
-
-   return availableCPUs ? availableCPUs : 1;
-}
-
-static void LinuxProcessList_updateCPUcount(ProcessList* super) {
-   /* Similar to get_nprocs_conf(3) / _SC_NPROCESSORS_CONF
-    * https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/getsysstats.c;hb=HEAD
-    */
-
-   LinuxProcessList* this = (LinuxProcessList*) super;
-   unsigned int existing = 0, active = 0;
-
-   // Initialize the cpuData array before anything else.
-   if (!this->cpuData) {
-      this->cpuData = xCalloc(2, sizeof(CPUData));
-      this->cpuData[0].online = true; /* average is always "online" */
-      this->cpuData[1].online = true;
-      super->activeCPUs = 1;
-      super->existingCPUs = 1;
-   }
-
-   DIR* dir = opendir("/sys/devices/system/cpu");
-   if (!dir)
-      return;
-
-   unsigned int currExisting = super->existingCPUs;
-
-   const struct dirent* entry;
-   while ((entry = readdir(dir)) != NULL) {
-      if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN)
-         continue;
-
-      if (!String_startsWith(entry->d_name, "cpu"))
-         continue;
-
-      char *endp;
-      unsigned long int id = strtoul(entry->d_name + 3, &endp, 10);
-      if (id == ULONG_MAX || endp == entry->d_name + 3 || *endp != '\0')
-         continue;
-
-#ifdef HAVE_OPENAT
-      int cpuDirFd = openat(dirfd(dir), entry->d_name, O_DIRECTORY | O_PATH | O_NOFOLLOW);
-      if (cpuDirFd < 0)
-         continue;
-#else
-      char cpuDirFd[4096];
-      xSnprintf(cpuDirFd, sizeof(cpuDirFd), "/sys/devices/system/cpu/%s", entry->d_name);
-#endif
-
-      existing++;
-
-      /* readdir() iterates with no specific order */
-      unsigned int max = MAXIMUM(existing, id + 1);
-      if (max > currExisting) {
-         this->cpuData = xReallocArrayZero(this->cpuData, currExisting ? (currExisting + 1) : 0, max + /* aggregate */ 1, sizeof(CPUData));
-         this->cpuData[0].online = true; /* average is always "online" */
-         currExisting = max;
-      }
-
-      char buffer[8];
-      ssize_t res = xReadfileat(cpuDirFd, "online", buffer, sizeof(buffer));
-      /* If the file "online" does not exist or on failure count as active */
-      if (res < 1 || buffer[0] != '0') {
-         active++;
-         this->cpuData[id + 1].online = true;
-      } else {
-         this->cpuData[id + 1].online = false;
-      }
-
-      Compat_openatArgClose(cpuDirFd);
-   }
-
-   closedir(dir);
-
-   // return if no CPU is found
-   if (existing < 1)
-      return;
-
-   if (Running_containerized) {
-	   /* LXC munges /proc/cpuinfo but not the /sys/devices/system/cpu/ files,
-	    * so limit the visible CPUs to what the guest has been configured to see: */
-	   currExisting = active = scanAvailableCPUsFromCPUinfo(this);
-   }
-
-#ifdef HAVE_SENSORS_SENSORS_H
-   /* When started with offline CPUs, libsensors does not monitor those,
-    * even when they become online. */
-   if (super->existingCPUs != 0 && (active > super->activeCPUs || currExisting > super->existingCPUs))
-      LibSensors_reload();
-#endif
-
-   super->activeCPUs = active;
-   assert(Running_containerized || (existing == currExisting));
-   super->existingCPUs = currExisting;
-}
-
-ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId) {
-   LinuxProcessList* this = xCalloc(1, sizeof(LinuxProcessList));
-   ProcessList* pl = &(this->super);
-
-   ProcessList_init(pl, Class(LinuxProcess), usersTable, dynamicMeters, dynamicColumns, pidMatchList, userId);
-   LinuxProcessList_initTtyDrivers(this);
-
-   // Initialize page size
-   pageSize = sysconf(_SC_PAGESIZE);
-   if (pageSize == -1)
-      CRT_fatalError("Cannot get pagesize by sysconf(_SC_PAGESIZE)");
-   pageSizeKB = pageSize / ONE_K;
-
-   // Initialize clock ticks
-   jiffy = sysconf(_SC_CLK_TCK);
-   if (jiffy == -1)
-      CRT_fatalError("Cannot get clock ticks by sysconf(_SC_CLK_TCK)");
-
-   // Test /proc/PID/smaps_rollup availability (faster to parse, Linux 4.14+)
-   this->haveSmapsRollup = (access(PROCDIR "/self/smaps_rollup", R_OK) == 0);
-
-   // Read btime (the kernel boot time, as number of seconds since the epoch)
-   FILE* statfile = fopen(PROCSTATFILE, "r");
-   if (statfile == NULL)
-      CRT_fatalError("Cannot open " PROCSTATFILE);
-   while (true) {
-      char buffer[PROC_LINE_LENGTH + 1];
-      if (fgets(buffer, sizeof(buffer), statfile) == NULL)
-         break;
-      if (String_startsWith(buffer, "btime ") == false)
-         continue;
-      if (sscanf(buffer, "btime %lld\n", &btime) == 1)
-         break;
-      CRT_fatalError("Failed to parse btime from " PROCSTATFILE);
-   }
-
-   fclose(statfile);
-
-   if (btime == -1)
-      CRT_fatalError("No btime in " PROCSTATFILE);
-
-   // Initialize CPU count
-   LinuxProcessList_updateCPUcount(pl);
-
-   return pl;
-}
-
-void ProcessList_delete(ProcessList* pl) {
-   LinuxProcessList* this = (LinuxProcessList*) pl;
-   ProcessList_done(pl);
-   free(this->cpuData);
-   if (this->ttyDrivers) {
-      for (int i = 0; this->ttyDrivers[i].path; i++) {
-         free(this->ttyDrivers[i].path);
-      }
-      free(this->ttyDrivers);
-   }
-   #ifdef HAVE_DELAYACCT
-   if (this->netlink_socket) {
-      nl_close(this->netlink_socket);
-      nl_socket_free(this->netlink_socket);
-   }
-   #endif
-   free(this);
-}
-
-static inline unsigned long long LinuxProcessList_adjustTime(unsigned long long t) {
-   return t * 100 / jiffy;
-}
-
-/* Taken from: https://github.com/torvalds/linux/blob/64570fbc14f8d7cb3fe3995f20e26bc25ce4b2cc/fs/proc/array.c#L120 */
-static inline ProcessState LinuxProcessList_getProcessState(char state) {
-   switch (state) {
-      case 'S': return SLEEPING;
-      case 'X': return DEFUNCT;
-      case 'Z': return ZOMBIE;
-      case 't': return TRACED;
-      case 'T': return STOPPED;
-      case 'D': return UNINTERRUPTIBLE_WAIT;
-      case 'R': return RUNNING;
-      case 'P': return BLOCKED;
-      case 'I': return IDLE;
-      default: return UNKNOWN;
-   }
-}
-
-static bool LinuxProcessList_readStatFile(Process* process, openat_arg_t procFd, char* command, size_t commLen) {
-   LinuxProcess* lp = (LinuxProcess*) process;
-
-   char buf[MAX_READ + 1];
-   ssize_t r = xReadfileat(procFd, "stat", buf, sizeof(buf));
-   if (r < 0)
-      return false;
-
-   /* (1) pid   -  %d */
-   assert(process->pid == atoi(buf));
-   char* location = strchr(buf, ' ');
-   if (!location)
-      return false;
-
-   /* (2) comm  -  (%s) */
-   location += 2;
-   char* end = strrchr(location, ')');
-   if (!end)
-      return false;
-
-   String_safeStrncpy(command, location, MINIMUM((size_t)(end - location + 1), commLen));
-
-   location = end + 2;
-
-   /* (3) state  -  %c */
-   process->state = LinuxProcessList_getProcessState(location[0]);
-   location += 2;
-
-   /* (4) ppid  -  %d */
-   process->ppid = strtol(location, &location, 10);
-   location += 1;
-
-   /* (5) pgrp  -  %d */
-   process->pgrp = strtol(location, &location, 10);
-   location += 1;
-
-   /* (6) session  -  %d */
-   process->session = strtol(location, &location, 10);
-   location += 1;
-
-   /* (7) tty_nr  -  %d */
-   process->tty_nr = strtoul(location, &location, 10);
-   location += 1;
-
-   /* (8) tpgid  -  %d */
-   process->tpgid = strtol(location, &location, 10);
-   location += 1;
-
-   /* (9) flags  -  %u */
-   lp->flags = strtoul(location, &location, 10);
-   location += 1;
-
-   /* (10) minflt  -  %lu */
-   process->minflt = strtoull(location, &location, 10);
-   location += 1;
-
-   /* (11) cminflt  -  %lu */
-   lp->cminflt = strtoull(location, &location, 10);
-   location += 1;
-
-   /* (12) majflt  -  %lu */
-   process->majflt = strtoull(location, &location, 10);
-   location += 1;
-
-   /* (13) cmajflt  -  %lu */
-   lp->cmajflt = strtoull(location, &location, 10);
-   location += 1;
-
-   /* (14) utime  -  %lu */
-   lp->utime = LinuxProcessList_adjustTime(strtoull(location, &location, 10));
-   location += 1;
-
-   /* (15) stime  -  %lu */
-   lp->stime = LinuxProcessList_adjustTime(strtoull(location, &location, 10));
-   location += 1;
-
-   /* (16) cutime  -  %ld */
-   lp->cutime = LinuxProcessList_adjustTime(strtoull(location, &location, 10));
-   location += 1;
-
-   /* (17) cstime  -  %ld */
-   lp->cstime = LinuxProcessList_adjustTime(strtoull(location, &location, 10));
-   location += 1;
-
-   /* (18) priority  -  %ld */
-   process->priority = strtol(location, &location, 10);
-   location += 1;
-
-   /* (19) nice  -  %ld */
-   process->nice = strtol(location, &location, 10);
-   location += 1;
-
-   /* (20) num_threads  -  %ld */
-   process->nlwp = strtol(location, &location, 10);
-   location += 1;
-
-   /* Skip (21) itrealvalue  -  %ld */
-   location = strchr(location, ' ') + 1;
-
-   /* (22) starttime  -  %llu */
-   if (process->starttime_ctime == 0) {
-      process->starttime_ctime = btime + LinuxProcessList_adjustTime(strtoll(location, &location, 10)) / 100;
-   } else {
-      location = strchr(location, ' ');
-   }
-   location += 1;
-
-   /* Skip (23) - (38) */
-   for (int i = 0; i < 16; i++) {
-      location = strchr(location, ' ') + 1;
-   }
-
-   assert(location != NULL);
-
-   /* (39) processor  -  %d */
-   process->processor = strtol(location, &location, 10);
-
-   /* Ignore further fields */
-
-   process->time = lp->utime + lp->stime;
-
-   return true;
-}
-
-
-static bool LinuxProcessList_updateUser(ProcessList* processList, Process* process, openat_arg_t procFd) {
-   struct stat sstat;
-#ifdef HAVE_OPENAT
-   int statok = fstat(procFd, &sstat);
-#else
-   int statok = stat(procFd, &sstat);
-#endif
-   if (statok == -1)
-      return false;
-
-   if (process->st_uid != sstat.st_uid) {
-      process->st_uid = sstat.st_uid;
-      process->user = UsersTable_getRef(processList->usersTable, sstat.st_uid);
-   }
-
-   return true;
-}
-
-static void LinuxProcessList_readIoFile(LinuxProcess* process, openat_arg_t procFd, unsigned long long realtimeMs) {
-   char buffer[1024];
-   ssize_t r = xReadfileat(procFd, "io", buffer, sizeof(buffer));
-   if (r < 0) {
-      process->io_rate_read_bps = NAN;
-      process->io_rate_write_bps = NAN;
-      process->io_rchar = ULLONG_MAX;
-      process->io_wchar = ULLONG_MAX;
-      process->io_syscr = ULLONG_MAX;
-      process->io_syscw = ULLONG_MAX;
-      process->io_read_bytes = ULLONG_MAX;
-      process->io_write_bytes = ULLONG_MAX;
-      process->io_cancelled_write_bytes = ULLONG_MAX;
-      process->io_last_scan_time_ms = realtimeMs;
-      return;
-   }
-
-   unsigned long long last_read = process->io_read_bytes;
-   unsigned long long last_write = process->io_write_bytes;
-   unsigned long long time_delta = realtimeMs > process->io_last_scan_time_ms ? realtimeMs - process->io_last_scan_time_ms : 0;
-
-   char* buf = buffer;
-   const char* line;
-   while ((line = strsep(&buf, "\n")) != NULL) {
-      switch (line[0]) {
-      case 'r':
-         if (line[1] == 'c' && String_startsWith(line + 2, "har: ")) {
-            process->io_rchar = strtoull(line + 7, NULL, 10);
-         } else if (String_startsWith(line + 1, "ead_bytes: ")) {
-            process->io_read_bytes = strtoull(line + 12, NULL, 10);
-            process->io_rate_read_bps = time_delta ? (process->io_read_bytes - last_read) * /*ms to s*/1000. / time_delta : NAN;
-         }
-         break;
-      case 'w':
-         if (line[1] == 'c' && String_startsWith(line + 2, "har: ")) {
-            process->io_wchar = strtoull(line + 7, NULL, 10);
-         } else if (String_startsWith(line + 1, "rite_bytes: ")) {
-            process->io_write_bytes = strtoull(line + 13, NULL, 10);
-            process->io_rate_write_bps = time_delta ? (process->io_write_bytes - last_write) * /*ms to s*/1000. / time_delta : NAN;
-         }
-         break;
-      case 's':
-         if (line[4] == 'r' && String_startsWith(line + 1, "yscr: ")) {
-            process->io_syscr = strtoull(line + 7, NULL, 10);
-         } else if (String_startsWith(line + 1, "yscw: ")) {
-            process->io_syscw = strtoull(line + 7, NULL, 10);
-         }
-         break;
-      case 'c':
-         if (String_startsWith(line + 1, "ancelled_write_bytes: ")) {
-            process->io_cancelled_write_bytes = strtoull(line + 23, NULL, 10);
-         }
-      }
-   }
-
-   process->io_last_scan_time_ms = realtimeMs;
-}
-
-typedef struct LibraryData_ {
-   uint64_t size;
-   bool exec;
-} LibraryData;
-
-static inline uint64_t fast_strtoull_dec(char** str, int maxlen) {
-   register uint64_t result = 0;
-
-   if (!maxlen)
-      --maxlen;
-
-   while (maxlen-- && **str >= '0' && **str <= '9') {
-      result *= 10;
-      result += **str - '0';
-      (*str)++;
-   }
-
-   return result;
-}
-
-static inline uint64_t fast_strtoull_hex(char** str, int maxlen) {
-   register uint64_t result = 0;
-   register int nibble, letter;
-   const long valid_mask = 0x03FF007E;
-
-   if (!maxlen)
-      --maxlen;
-
-   while (maxlen--) {
-      nibble = (unsigned char)**str;
-      if (!(valid_mask & (1 << (nibble & 0x1F))))
-         break;
-      if ((nibble < '0') || (nibble & ~0x20) > 'F')
-         break;
-      letter = (nibble & 0x40) ? 'A' - '9' - 1 : 0;
-      nibble &=~0x20; // to upper
-      nibble ^= 0x10; // switch letters and digits
-      nibble -= letter;
-      nibble &= 0x0f;
-      result <<= 4;
-      result += (uint64_t)nibble;
-      (*str)++;
-   }
-
-   return result;
-}
-
-static void LinuxProcessList_calcLibSize_helper(ATTR_UNUSED ht_key_t key, void* value, void* data) {
-   if (!data)
-      return;
-
-   if (!value)
-      return;
-
-   const LibraryData* v = (const LibraryData*)value;
-   uint64_t* d = (uint64_t*)data;
-   if (!v->exec)
-      return;
-
-   *d += v->size;
-}
-
-static void LinuxProcessList_readMaps(LinuxProcess* process, openat_arg_t procFd, bool calcSize, bool checkDeletedLib) {
-   Process* proc = (Process*)process;
-
-   proc->usesDeletedLib = false;
-
-   FILE* mapsfile = fopenat(procFd, "maps", "r");
-   if (!mapsfile)
-      return;
-
-   Hashtable* ht = NULL;
-   if (calcSize)
-      ht = Hashtable_new(64, true);
-
-   char buffer[1024];
-   while (fgets(buffer, sizeof(buffer), mapsfile)) {
-      uint64_t map_start;
-      uint64_t map_end;
-      bool map_execute;
-      unsigned int map_devmaj;
-      unsigned int map_devmin;
-      uint64_t map_inode;
-
-      // Short circuit test: Look for a slash
-      if (!strchr(buffer, '/'))
-         continue;
-
-      // Parse format: "%Lx-%Lx %4s %x %2x:%2x %Ld"
-      char* readptr = buffer;
-
-      map_start = fast_strtoull_hex(&readptr, 16);
-      if ('-' != *readptr++)
-         continue;
-
-      map_end = fast_strtoull_hex(&readptr, 16);
-      if (' ' != *readptr++)
-         continue;
-
-      map_execute = (readptr[2] == 'x');
-      readptr += 4;
-      if (' ' != *readptr++)
-         continue;
-
-      while(*readptr > ' ')
-         readptr++; // Skip parsing this hex value
-      if (' ' != *readptr++)
-         continue;
-
-      map_devmaj = fast_strtoull_hex(&readptr, 4);
-      if (':' != *readptr++)
-         continue;
-
-      map_devmin = fast_strtoull_hex(&readptr, 4);
-      if (' ' != *readptr++)
-         continue;
-
-      //Minor shortcut: Once we know there's no file for this region, we skip
-      if (!map_devmaj && !map_devmin)
-         continue;
-
-      map_inode = fast_strtoull_dec(&readptr, 20);
-      if (!map_inode)
-         continue;
-
-      if (calcSize) {
-         LibraryData* libdata = Hashtable_get(ht, map_inode);
-         if (!libdata) {
-            libdata = xCalloc(1, sizeof(LibraryData));
-            Hashtable_put(ht, map_inode, libdata);
-         }
-
-         libdata->size += map_end - map_start;
-         libdata->exec |= map_execute;
-      }
-
-      if (checkDeletedLib && map_execute && !proc->usesDeletedLib) {
-         while (*readptr == ' ')
-            readptr++;
-
-         if (*readptr != '/')
-            continue;
-
-         if (String_startsWith(readptr, "/memfd:"))
-            continue;
-
-         /* Virtualbox maps /dev/zero for memory allocation. That results in
-          * false positive, so ignore. */
-         if (String_eq(readptr, "/dev/zero (deleted)\n"))
-            continue;
-
-         if (strstr(readptr, " (deleted)\n")) {
-            proc->usesDeletedLib = true;
-            if (!calcSize)
-               break;
-         }
-      }
-   }
-
-   fclose(mapsfile);
-
-   if (calcSize) {
-      uint64_t total_size = 0;
-      Hashtable_foreach(ht, LinuxProcessList_calcLibSize_helper, &total_size);
-
-      Hashtable_delete(ht);
-
-      process->m_lrs = total_size / pageSize;
-   }
-}
-
-static bool LinuxProcessList_readStatmFile(LinuxProcess* process, openat_arg_t procFd) {
-   FILE* statmfile = fopenat(procFd, "statm", "r");
-   if (!statmfile)
-      return false;
-
-   long int dummy, dummy2;
-
-   int r = fscanf(statmfile, "%ld %ld %ld %ld %ld %ld %ld",
-                  &process->super.m_virt,
-                  &process->super.m_resident,
-                  &process->m_share,
-                  &process->m_trs,
-                  &dummy, /* unused since Linux 2.6; always 0 */
-                  &process->m_drs,
-                  &dummy2); /* unused since Linux 2.6; always 0 */
-   fclose(statmfile);
-
-   if (r == 7) {
-      process->super.m_virt *= pageSizeKB;
-      process->super.m_resident *= pageSizeKB;
-   }
-
-   return r == 7;
-}
-
-static bool LinuxProcessList_readSmapsFile(LinuxProcess* process, openat_arg_t procFd, bool haveSmapsRollup) {
-   //http://elixir.free-electrons.com/linux/v4.10/source/fs/proc/task_mmu.c#L719
-   //kernel will return data in chunks of size PAGE_SIZE or less.
-   FILE* f = fopenat(procFd, haveSmapsRollup ? "smaps_rollup" : "smaps", "r");
-   if (!f)
-      return false;
-
-   process->m_pss   = 0;
-   process->m_swap  = 0;
-   process->m_psswp = 0;
-
-   char buffer[256];
-   while (fgets(buffer, sizeof(buffer), f)) {
-      if (!strchr(buffer, '\n')) {
-         // Partial line, skip to end of this line
-         while (fgets(buffer, sizeof(buffer), f)) {
-            if (strchr(buffer, '\n')) {
-               break;
-            }
-         }
-         continue;
-      }
-
-      if (String_startsWith(buffer, "Pss:")) {
-         process->m_pss += strtol(buffer + 4, NULL, 10);
-      } else if (String_startsWith(buffer, "Swap:")) {
-         process->m_swap += strtol(buffer + 5, NULL, 10);
-      } else if (String_startsWith(buffer, "SwapPss:")) {
-         process->m_psswp += strtol(buffer + 8, NULL, 10);
-      }
-   }
-
-   fclose(f);
-   return true;
-}
-
-#ifdef HAVE_OPENVZ
-
-static void LinuxProcessList_readOpenVZData(LinuxProcess* process, openat_arg_t procFd) {
-   if (access(PROCDIR "/vz", R_OK) != 0) {
-      free(process->ctid);
-      process->ctid = NULL;
-      process->vpid = process->super.pid;
-      return;
-   }
-
-   FILE* file = fopenat(procFd, "status", "r");
-   if (!file) {
-      free(process->ctid);
-      process->ctid = NULL;
-      process->vpid = process->super.pid;
-      return;
-   }
-
-   bool foundEnvID = false;
-   bool foundVPid = false;
-   char linebuf[256];
-   while (fgets(linebuf, sizeof(linebuf), file) != NULL) {
-      if (strchr(linebuf, '\n') == NULL) {
-         // Partial line, skip to end of this line
-         while (fgets(linebuf, sizeof(linebuf), file) != NULL) {
-            if (strchr(linebuf, '\n') != NULL) {
-               break;
-            }
-         }
-         continue;
-      }
-
-      char* name_value_sep = strchr(linebuf, ':');
-      if (name_value_sep == NULL) {
-         continue;
-      }
-
-      int field;
-      if (0 == strncasecmp(linebuf, "envID", name_value_sep - linebuf)) {
-         field = 1;
-      } else if (0 == strncasecmp(linebuf, "VPid", name_value_sep - linebuf)) {
-         field = 2;
-      } else {
-         continue;
-      }
-
-      do {
-         name_value_sep++;
-      } while (*name_value_sep != '\0' && *name_value_sep <= 32);
-
-      char* value_end = name_value_sep;
-
-      while(*value_end > 32) {
-         value_end++;
-      }
-
-      if (name_value_sep == value_end) {
-         continue;
-      }
-
-      *value_end = '\0';
-
-      switch(field) {
-      case 1:
-         foundEnvID = true;
-         if (!String_eq(name_value_sep, process->ctid ? process->ctid : ""))
-            free_and_xStrdup(&process->ctid, name_value_sep);
-         break;
-      case 2:
-         foundVPid = true;
-         process->vpid = strtoul(name_value_sep, NULL, 0);
-         break;
-      default:
-         //Sanity Check: Should never reach here, or the implementation is missing something!
-         assert(false && "OpenVZ handling: Unimplemented case for field handling reached.");
-      }
-   }
-
-   fclose(file);
-
-   if (!foundEnvID) {
-      free(process->ctid);
-      process->ctid = NULL;
-   }
-
-   if (!foundVPid) {
-      process->vpid = process->super.pid;
-   }
-}
-
-#endif
-
-static void LinuxProcessList_readCGroupFile(LinuxProcess* process, openat_arg_t procFd) {
-   FILE* file = fopenat(procFd, "cgroup", "r");
-   if (!file) {
-      if (process->cgroup) {
-         free(process->cgroup);
-         process->cgroup = NULL;
-      }
-      if (process->cgroup_short) {
-         free(process->cgroup_short);
-         process->cgroup_short = NULL;
-      }
-      return;
-   }
-   char output[PROC_LINE_LENGTH + 1];
-   output[0] = '\0';
-   char* at = output;
-   int left = PROC_LINE_LENGTH;
-   while (!feof(file) && left > 0) {
-      char buffer[PROC_LINE_LENGTH + 1];
-      const char* ok = fgets(buffer, PROC_LINE_LENGTH, file);
-      if (!ok)
-         break;
-
-      char* group = buffer;
-      for (size_t i = 0; i < 2; i++) {
-         group = strchrnul(group, ':');
-         if (!*group)
-            break;
-         group++;
-      }
-
-      char* eol = strchrnul(group, '\n');
-      *eol = '\0';
-
-      if (at != output) {
-         *at = ';';
-         at++;
-         left--;
-      }
-      int wrote = snprintf(at, left, "%s", group);
-      left -= wrote;
-   }
-   fclose(file);
-
-   bool changed = !process->cgroup || !String_eq(process->cgroup, output);
-
-   Process_updateFieldWidth(CGROUP, strlen(output));
-   free_and_xStrdup(&process->cgroup, output);
-
-   if (!changed) {
-      if(process->cgroup_short) {
-         Process_updateFieldWidth(CCGROUP, strlen(process->cgroup_short));
-      } else {
-         //CCGROUP is alias to normal CGROUP if shortening fails
-         Process_updateFieldWidth(CCGROUP, strlen(process->cgroup));
-      }
-      return;
-   }
-
-   char* cgroup_short = CGroup_filterName(process->cgroup);
-   if (cgroup_short) {
-      Process_updateFieldWidth(CCGROUP, strlen(cgroup_short));
-      free_and_xStrdup(&process->cgroup_short, cgroup_short);
-      free(cgroup_short);
-   } else {
-      //CCGROUP is alias to normal CGROUP if shortening fails
-      Process_updateFieldWidth(CCGROUP, strlen(process->cgroup));
-      free(process->cgroup_short);
-      process->cgroup_short = NULL;
-   }
-}
-
-#ifdef HAVE_VSERVER
-
-static void LinuxProcessList_readVServerData(LinuxProcess* process, openat_arg_t procFd) {
-   FILE* file = fopenat(procFd, "status", "r");
-   if (!file)
-      return;
-
-   char buffer[PROC_LINE_LENGTH + 1];
-   process->vxid = 0;
-   while (fgets(buffer, PROC_LINE_LENGTH, file)) {
-      if (String_startsWith(buffer, "VxID:")) {
-         int vxid;
-         int ok = sscanf(buffer, "VxID:\t%32d", &vxid);
-         if (ok >= 1) {
-            process->vxid = vxid;
-         }
-      }
-      #if defined HAVE_ANCIENT_VSERVER
-      else if (String_startsWith(buffer, "s_context:")) {
-         int vxid;
-         int ok = sscanf(buffer, "s_context:\t%32d", &vxid);
-         if (ok >= 1) {
-            process->vxid = vxid;
-         }
-      }
-      #endif
-   }
-   fclose(file);
-}
-
-#endif
-
-static void LinuxProcessList_readOomData(LinuxProcess* process, openat_arg_t procFd) {
-   FILE* file = fopenat(procFd, "oom_score", "r");
-   if (!file)
-      return;
-
-   char buffer[PROC_LINE_LENGTH + 1];
-   if (fgets(buffer, PROC_LINE_LENGTH, file)) {
-      unsigned int oom;
-      int ok = sscanf(buffer, "%u", &oom);
-      if (ok >= 1) {
-         process->oom = oom;
-      }
-   }
-   fclose(file);
-}
-
-static void LinuxProcessList_readAutogroup(LinuxProcess* process, openat_arg_t procFd) {
-   process->autogroup_id = -1;
-
-   char autogroup[64]; // space for two numeric values and fixed length strings
-   ssize_t amtRead = xReadfileat(procFd, "autogroup", autogroup, sizeof(autogroup));
-   if (amtRead < 0)
-      return;
-
-   long int identity;
-   int nice;
-   int ok = sscanf(autogroup, "/autogroup-%ld nice %d", &identity, &nice);
-   if (ok == 2) {
-      process->autogroup_id = identity;
-      process->autogroup_nice = nice;
-   }
-}
-
-static void LinuxProcessList_readCtxtData(LinuxProcess* process, openat_arg_t procFd) {
-   FILE* file = fopenat(procFd, "status", "r");
-   if (!file)
-      return;
-
-   char buffer[PROC_LINE_LENGTH + 1];
-   unsigned long ctxt = 0;
-   while (fgets(buffer, PROC_LINE_LENGTH, file)) {
-      if (String_startsWith(buffer, "voluntary_ctxt_switches:")) {
-         unsigned long vctxt;
-         int ok = sscanf(buffer, "voluntary_ctxt_switches:\t%lu", &vctxt);
-         if (ok >= 1) {
-            ctxt += vctxt;
-         }
-      } else if (String_startsWith(buffer, "nonvoluntary_ctxt_switches:")) {
-         unsigned long nvctxt;
-         int ok = sscanf(buffer, "nonvoluntary_ctxt_switches:\t%lu", &nvctxt);
-         if (ok >= 1) {
-            ctxt += nvctxt;
-         }
-      }
-   }
-   fclose(file);
-   process->ctxt_diff = (ctxt > process->ctxt_total) ? (ctxt - process->ctxt_total) : 0;
-   process->ctxt_total = ctxt;
-}
-
-static void LinuxProcessList_readSecattrData(LinuxProcess* process, openat_arg_t procFd) {
-   FILE* file = fopenat(procFd, "attr/current", "r");
-   if (!file) {
-      free(process->secattr);
-      process->secattr = NULL;
-      return;
-   }
-
-   char buffer[PROC_LINE_LENGTH + 1];
-   const char* res = fgets(buffer, sizeof(buffer), file);
-   fclose(file);
-   if (!res) {
-      free(process->secattr);
-      process->secattr = NULL;
-      return;
-   }
-   char* newline = strchr(buffer, '\n');
-   if (newline) {
-      *newline = '\0';
-   }
-
-   Process_updateFieldWidth(SECATTR, strlen(buffer));
-
-   if (process->secattr && String_eq(process->secattr, buffer)) {
-      return;
-   }
-   free_and_xStrdup(&process->secattr, buffer);
-}
-
-static void LinuxProcessList_readCwd(LinuxProcess* process, openat_arg_t procFd) {
-   char pathBuffer[PATH_MAX + 1] = {0};
-
-#if defined(HAVE_READLINKAT) && defined(HAVE_OPENAT)
-   ssize_t r = readlinkat(procFd, "cwd", pathBuffer, sizeof(pathBuffer) - 1);
-#else
-   char filename[MAX_NAME + 1];
-   xSnprintf(filename, sizeof(filename), "%s/cwd", procFd);
-   ssize_t r = readlink(filename, pathBuffer, sizeof(pathBuffer) - 1);
-#endif
-
-   if (r < 0) {
-      free(process->super.procCwd);
-      process->super.procCwd = NULL;
-      return;
-   }
-
-   pathBuffer[r] = '\0';
-
-   if (process->super.procCwd && String_eq(process->super.procCwd, pathBuffer))
-      return;
-
-   free_and_xStrdup(&process->super.procCwd, pathBuffer);
-}
-
-#ifdef HAVE_DELAYACCT
-
-static int handleNetlinkMsg(struct nl_msg* nlmsg, void* linuxProcess) {
-   struct nlmsghdr* nlhdr;
-   struct nlattr* nlattrs[TASKSTATS_TYPE_MAX + 1];
-   const struct nlattr* nlattr;
-   struct taskstats stats;
-   int rem;
-   LinuxProcess* lp = (LinuxProcess*) linuxProcess;
-
-   nlhdr = nlmsg_hdr(nlmsg);
-
-   if (genlmsg_parse(nlhdr, 0, nlattrs, TASKSTATS_TYPE_MAX, NULL) < 0) {
-      return NL_SKIP;
-   }
-
-   if ((nlattr = nlattrs[TASKSTATS_TYPE_AGGR_PID]) || (nlattr = nlattrs[TASKSTATS_TYPE_NULL])) {
-      memcpy(&stats, nla_data(nla_next(nla_data(nlattr), &rem)), sizeof(stats));
-      assert(lp->super.pid == (pid_t)stats.ac_pid);
-
-      unsigned long long int timeDelta = stats.ac_etime * 1000 - lp->delay_read_time;
-      #define BOUNDS(x) (isnan(x) ? 0.0 : ((x) > 100) ? 100.0 : (x))
-      #define DELTAPERC(x,y) BOUNDS((float) ((x) - (y)) / timeDelta * 100)
-      lp->cpu_delay_percent = DELTAPERC(stats.cpu_delay_total, lp->cpu_delay_total);
-      lp->blkio_delay_percent = DELTAPERC(stats.blkio_delay_total, lp->blkio_delay_total);
-      lp->swapin_delay_percent = DELTAPERC(stats.swapin_delay_total, lp->swapin_delay_total);
-      #undef DELTAPERC
-      #undef BOUNDS
-
-      lp->swapin_delay_total = stats.swapin_delay_total;
-      lp->blkio_delay_total = stats.blkio_delay_total;
-      lp->cpu_delay_total = stats.cpu_delay_total;
-      lp->delay_read_time = stats.ac_etime * 1000;
-   }
-   return NL_OK;
-}
-
-static void LinuxProcessList_readDelayAcctData(LinuxProcessList* this, LinuxProcess* process) {
-   struct nl_msg* msg;
-
-   if (!this->netlink_socket) {
-      LinuxProcessList_initNetlinkSocket(this);
-      if (!this->netlink_socket) {
-         goto delayacct_failure;
-      }
-   }
-
-   if (nl_socket_modify_cb(this->netlink_socket, NL_CB_VALID, NL_CB_CUSTOM, handleNetlinkMsg, process) < 0) {
-      goto delayacct_failure;
-   }
-
-   if (! (msg = nlmsg_alloc())) {
-      goto delayacct_failure;
-   }
-
-   if (! genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, this->netlink_family, 0, NLM_F_REQUEST, TASKSTATS_CMD_GET, TASKSTATS_VERSION)) {
-      nlmsg_free(msg);
-   }
-
-   if (nla_put_u32(msg, TASKSTATS_CMD_ATTR_PID, process->super.pid) < 0) {
-      nlmsg_free(msg);
-   }
-
-   if (nl_send_sync(this->netlink_socket, msg) < 0) {
-      goto delayacct_failure;
-   }
-
-   if (nl_recvmsgs_default(this->netlink_socket) < 0) {
-      goto delayacct_failure;
-   }
-
-   return;
-
-delayacct_failure:
-   process->swapin_delay_percent = NAN;
-   process->blkio_delay_percent = NAN;
-   process->cpu_delay_percent = NAN;
-}
-
-#endif
-
-static bool LinuxProcessList_readCmdlineFile(Process* process, openat_arg_t procFd) {
-   char command[4096 + 1]; // max cmdline length on Linux
-   ssize_t amtRead = xReadfileat(procFd, "cmdline", command, sizeof(command));
-   if (amtRead <= 0)
-      return false;
-
-   int tokenEnd = 0;
-   int tokenStart = 0;
-   int lastChar = 0;
-   bool argSepNUL = false;
-   bool argSepSpace = false;
-
-   for (int i = 0; i < amtRead; i++) {
-      /* newline used as delimiter - when forming the mergedCommand, newline is
-       * converted to space by Process_makeCommandStr */
-      if (command[i] == '\0') {
-         command[i] = '\n';
-      } else {
-         /* Record some information for the argument parsing heuristic below. */
-         if (tokenEnd)
-            argSepNUL = true;
-         if (command[i] <= ' ')
-            argSepSpace = true;
-      }
-
-      if (command[i] == '\n') {
-         if (tokenEnd == 0) {
-            tokenEnd = i;
-         }
-      } else {
-         /* htop considers the next character after the last / that is before
-          * basenameOffset, as the start of the basename in cmdline - see
-          * Process_writeCommand */
-         if (!tokenEnd && command[i] == '/') {
-            tokenStart = i + 1;
-         }
-         lastChar = i;
-      }
-   }
-
-   command[lastChar + 1] = '\0';
-
-   if (!argSepNUL && argSepSpace) {
-      /* Argument parsing heuristic.
-       *
-       * This heuristic is used for processes that rewrite their command line.
-       * Normally the command line is split by using NUL bytes between each argument.
-       * But some programs like chrome flatten this using spaces.
-       *
-       * This heuristic tries its best to undo this loss of information.
-       * To achieve this, we treat every character <= 32 as argument separators
-       * (i.e. all of ASCII control sequences and space).
-       * We then search for the basename of the cmdline in the first argument we found that way.
-       * As path names may contain we try to cross-validate if the path we got that way exists.
-       */
-
-      tokenStart = tokenEnd = 0;
-
-      // From initial scan we know there's at least one space.
-      // Check if that's part of a filename for an existing file.
-      if (Compat_faccessat(AT_FDCWD, command, F_OK, AT_SYMLINK_NOFOLLOW) != 0) {
-         // If we reach here the path does not exist.
-         // Thus begin searching for the part of it that actually is.
-
-         int tokenArg0Start = 0;
-
-         for (int i = 0; i <= lastChar; i++) {
-            /* Any ASCII control or space used as delimiter */
-            char tmpCommandChar = command[i];
-
-            if (command[i] <= ' ') {
-               if (!tokenEnd) {
-                  command[i] = '\0';
-
-                  bool found = Compat_faccessat(AT_FDCWD, command, F_OK, AT_SYMLINK_NOFOLLOW) == 0;
-
-                  // Restore if this wasn't it
-                  command[i] = found ? '\n' : tmpCommandChar;
-
-                  if (found)
-                     tokenEnd = i;
-                  if (!tokenArg0Start)
-                     tokenArg0Start = tokenStart;
-               } else {
-                  // Split on every further separator, regardless of path correctness
-                  command[i] = '\n';
-               }
-            } else if (!tokenEnd) {
-               if (command[i] == '/' || (command[i] == '\\' && (!tokenStart || command[tokenStart - 1] == '\\'))) {
-                  tokenStart = i + 1;
-               } else if (command[i] == ':' && (command[i + 1] != '/' && command[i + 1] != '\\')) {
-                  tokenEnd = i;
-               }
-            }
-         }
-
-         if (!tokenEnd) {
-            tokenStart = tokenArg0Start;
-
-            // No token delimiter found, forcibly split
-            for (int i = 0; i <= lastChar; i++) {
-               if (command[i] <= ' ') {
-                  command[i] = '\n';
-                  if (!tokenEnd) {
-                     tokenEnd = i;
-                  }
-               }
-            }
-         }
-      }
-
-      /* Some command lines are hard to parse, like
-       *   file.so [kdeinit5] file local:/run/user/1000/klauncherdqbouY.1.slave-socket local:/run/user/1000/kded5TwsDAx.1.slave-socket
-       * Reset if start is behind end.
-       */
-      if (tokenStart >= tokenEnd)
-         tokenStart = tokenEnd = 0;
-   }
-
-   if (tokenEnd == 0) {
-      tokenEnd = lastChar + 1;
-   }
-
-   Process_updateCmdline(process, command, tokenStart, tokenEnd);
-
-   /* /proc/[pid]/comm could change, so should be updated */
-   if ((amtRead = xReadfileat(procFd, "comm", command, sizeof(command))) > 0) {
-      command[amtRead - 1] = '\0';
-      Process_updateComm(process, command);
-   } else {
-      Process_updateComm(process, NULL);
-   }
-
-   char filename[MAX_NAME + 1];
-
-   /* execve could change /proc/[pid]/exe, so procExe should be updated */
-#if defined(HAVE_READLINKAT) && defined(HAVE_OPENAT)
-   amtRead = readlinkat(procFd, "exe", filename, sizeof(filename) - 1);
-#else
-   char path[4096];
-   xSnprintf(path, sizeof(path), "%s/exe", procFd);
-   amtRead = readlink(path, filename, sizeof(filename) - 1);
-#endif
-   if (amtRead > 0) {
-      filename[amtRead] = 0;
-      if (!process->procExe ||
-          (!process->procExeDeleted && !String_eq(filename, process->procExe)) ||
-          process->procExeDeleted) {
-
-         const char* deletedMarker = " (deleted)";
-         const size_t markerLen = strlen(deletedMarker);
-         const size_t filenameLen = strlen(filename);
-
-         if (filenameLen > markerLen) {
-            bool oldExeDeleted = process->procExeDeleted;
-
-            process->procExeDeleted = String_eq(filename + filenameLen - markerLen, deletedMarker);
-
-            if (process->procExeDeleted)
-               filename[filenameLen - markerLen] = '\0';
-
-            if (oldExeDeleted != process->procExeDeleted)
-               process->mergedCommand.lastUpdate = 0;
-         }
-
-         Process_updateExe(process, filename);
-      }
-   } else if (process->procExe) {
-      Process_updateExe(process, NULL);
-      process->procExeDeleted = false;
-   }
-
-   return true;
-}
-
-static char* LinuxProcessList_updateTtyDevice(TtyDriver* ttyDrivers, unsigned long int tty_nr) {
-   unsigned int maj = major(tty_nr);
-   unsigned int min = minor(tty_nr);
-
-   int i = -1;
-   for (;;) {
-      i++;
-      if ((!ttyDrivers[i].path) || maj < ttyDrivers[i].major) {
-         break;
-      }
-      if (maj > ttyDrivers[i].major) {
-         continue;
-      }
-      if (min < ttyDrivers[i].minorFrom) {
-         break;
-      }
-      if (min > ttyDrivers[i].minorTo) {
-         continue;
-      }
-      unsigned int idx = min - ttyDrivers[i].minorFrom;
-      struct stat sstat;
-      char* fullPath;
-      for (;;) {
-         xAsprintf(&fullPath, "%s/%d", ttyDrivers[i].path, idx);
-         int err = stat(fullPath, &sstat);
-         if (err == 0 && major(sstat.st_rdev) == maj && minor(sstat.st_rdev) == min) {
-            return fullPath;
-         }
-         free(fullPath);
-
-         xAsprintf(&fullPath, "%s%d", ttyDrivers[i].path, idx);
-         err = stat(fullPath, &sstat);
-         if (err == 0 && major(sstat.st_rdev) == maj && minor(sstat.st_rdev) == min) {
-            return fullPath;
-         }
-         free(fullPath);
-
-         if (idx == min) {
-            break;
-         }
-
-         idx = min;
-      }
-      int err = stat(ttyDrivers[i].path, &sstat);
-      if (err == 0 && tty_nr == sstat.st_rdev) {
-         return xStrdup(ttyDrivers[i].path);
-      }
-   }
-   char* out;
-   xAsprintf(&out, "/dev/%u:%u", maj, min);
-   return out;
-}
-
-static bool isOlderThan(const ProcessList* pl, const Process* proc, unsigned int seconds) {
-   assert(pl->realtimeMs > 0);
-
-   /* Starttime might not yet be parsed */
-   if (proc->starttime_ctime <= 0)
-	   return false;
-
-   uint64_t realtime = pl->realtimeMs / 1000;
-
-   if (realtime < (uint64_t)proc->starttime_ctime)
-      return false;
-
-   return realtime - proc->starttime_ctime > seconds;
-}
-
-static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_t parentFd, const char* dirname, const Process* parent, double period) {
-   ProcessList* pl = (ProcessList*) this;
-   const struct dirent* entry;
-   const Settings* settings = pl->settings;
-   const ScreenSettings* ss = settings->ss;
-
-#ifdef HAVE_OPENAT
-   int dirFd = openat(parentFd, dirname, O_RDONLY | O_DIRECTORY | O_NOFOLLOW);
-   if (dirFd < 0)
-      return false;
-   DIR* dir = fdopendir(dirFd);
-#else
-   char dirFd[4096];
-   xSnprintf(dirFd, sizeof(dirFd), "%s/%s", parentFd, dirname);
-   DIR* dir = opendir(dirFd);
-#endif
-   if (!dir) {
-      Compat_openatArgClose(dirFd);
-      return false;
-   }
-
-   const unsigned int activeCPUs = pl->activeCPUs;
-   const bool hideKernelThreads = settings->hideKernelThreads;
-   const bool hideUserlandThreads = settings->hideUserlandThreads;
-   while ((entry = readdir(dir)) != NULL) {
-      const char* name = entry->d_name;
-
-      // Ignore all non-directories
-      if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN) {
-         continue;
-      }
-
-      // The RedHat kernel hides threads with a dot.
-      // I believe this is non-standard.
-      if (name[0] == '.') {
-         name++;
-      }
-
-      // Just skip all non-number directories.
-      if (name[0] < '0' || name[0] > '9') {
-         continue;
-      }
-
-      // filename is a number: process directory
-      int pid;
-      {
-         char* endptr;
-         unsigned long parsedPid = strtoul(name, &endptr, 10);
-         if (parsedPid == 0 || parsedPid == ULONG_MAX || *endptr != '\0')
-            continue;
-         pid = parsedPid;
-      }
-
-      // Skip task directory of main thread
-      if (parent && pid == parent->pid)
-         continue;
-
-#ifdef HAVE_OPENAT
-      int procFd = openat(dirFd, entry->d_name, O_RDONLY | O_DIRECTORY | O_NOFOLLOW);
-      if (procFd < 0)
-         continue;
-#else
-      char procFd[4096];
-      xSnprintf(procFd, sizeof(procFd), "%s/%s", dirFd, entry->d_name);
-#endif
-
-      bool preExisting;
-      Process* proc = ProcessList_getProcess(pl, pid, &preExisting, LinuxProcess_new);
-      LinuxProcess* lp = (LinuxProcess*) proc;
-
-      proc->tgid = parent ? parent->pid : pid;
-      proc->isUserlandThread = proc->pid != proc->tgid;
-
-      LinuxProcessList_recurseProcTree(this, procFd, "task", proc, period);
-
-      /*
-       * These conditions will not trigger on first occurrence, cause we need to
-       * add the process to the ProcessList and do all one time scans
-       * (e.g. parsing the cmdline to detect a kernel thread)
-       * But it will short-circuit subsequent scans.
-       */
-      if (preExisting && hideKernelThreads && Process_isKernelThread(proc)) {
-         proc->updated = true;
-         proc->show = false;
-         pl->kernelThreads++;
-         pl->totalTasks++;
-         Compat_openatArgClose(procFd);
-         continue;
-      }
-      if (preExisting && hideUserlandThreads && Process_isUserlandThread(proc)) {
-         proc->updated = true;
-         proc->show = false;
-         pl->userlandThreads++;
-         pl->totalTasks++;
-         Compat_openatArgClose(procFd);
-         continue;
-      }
-
-      if (ss->flags & PROCESS_FLAG_IO)
-         LinuxProcessList_readIoFile(lp, procFd, pl->realtimeMs);
-
-      if (!LinuxProcessList_readStatmFile(lp, procFd))
-         goto errorReadingProcess;
-
-      {
-         bool prev = proc->usesDeletedLib;
-
-         if (!proc->isKernelThread && !proc->isUserlandThread &&
-            ((ss->flags & PROCESS_FLAG_LINUX_LRS_FIX) || (settings->highlightDeletedExe && !proc->procExeDeleted && isOlderThan(pl, proc, 10)))) {
-
-            // Check if we really should recalculate the M_LRS value for this process
-            uint64_t passedTimeInMs = pl->realtimeMs - lp->last_mlrs_calctime;
-
-            uint64_t recheck = ((uint64_t)rand()) % 2048;
-
-            if (passedTimeInMs > recheck) {
-               lp->last_mlrs_calctime = pl->realtimeMs;
-               LinuxProcessList_readMaps(lp, procFd, ss->flags & PROCESS_FLAG_LINUX_LRS_FIX, settings->highlightDeletedExe);
-            }
-         } else {
-            /* Copy from process structure in threads and reset if setting got disabled */
-            proc->usesDeletedLib = (proc->isUserlandThread && parent) ? parent->usesDeletedLib : false;
-            lp->m_lrs = (proc->isUserlandThread && parent) ? ((const LinuxProcess*)parent)->m_lrs : 0;
-         }
-
-         if (prev != proc->usesDeletedLib)
-            proc->mergedCommand.lastUpdate = 0;
-      }
-
-      if ((ss->flags & PROCESS_FLAG_LINUX_SMAPS) && !Process_isKernelThread(proc)) {
-         if (!parent) {
-            // Read smaps file of each process only every second pass to improve performance
-            static int smaps_flag = 0;
-            if ((pid & 1) == smaps_flag) {
-               LinuxProcessList_readSmapsFile(lp, procFd, this->haveSmapsRollup);
-            }
-            if (pid == 1) {
-               smaps_flag = !smaps_flag;
-            }
-         } else {
-            lp->m_pss = ((const LinuxProcess*)parent)->m_pss;
-         }
-      }
-
-      char statCommand[MAX_NAME + 1];
-      unsigned long long int lasttimes = (lp->utime + lp->stime);
-      unsigned long int tty_nr = proc->tty_nr;
-      if (! LinuxProcessList_readStatFile(proc, procFd, statCommand, sizeof(statCommand)))
-         goto errorReadingProcess;
-
-      if (lp->flags & PF_KTHREAD) {
-         proc->isKernelThread = true;
-      }
-
-      if (tty_nr != proc->tty_nr && this->ttyDrivers) {
-         free(proc->tty_name);
-         proc->tty_name = LinuxProcessList_updateTtyDevice(this->ttyDrivers, proc->tty_nr);
-      }
-
-      if (ss->flags & PROCESS_FLAG_LINUX_IOPRIO) {
-         LinuxProcess_updateIOPriority(lp);
-      }
-
-      /* period might be 0 after system sleep */
-      float percent_cpu = (period < 1E-6) ? 0.0F : ((lp->utime + lp->stime - lasttimes) / period * 100.0);
-      proc->percent_cpu = CLAMP(percent_cpu, 0.0F, activeCPUs * 100.0F);
-      proc->percent_mem = proc->m_resident / (double)(pl->totalMem) * 100.0;
-      Process_updateCPUFieldWidths(proc->percent_cpu);
-
-      if (! LinuxProcessList_updateUser(pl, proc, procFd))
-         goto errorReadingProcess;
-
-      if (!preExisting) {
-
-         #ifdef HAVE_OPENVZ
-         if (ss->flags & PROCESS_FLAG_LINUX_OPENVZ) {
-            LinuxProcessList_readOpenVZData(lp, procFd);
-         }
-         #endif
-
-         #ifdef HAVE_VSERVER
-         if (ss->flags & PROCESS_FLAG_LINUX_VSERVER) {
-            LinuxProcessList_readVServerData(lp, procFd);
-         }
-         #endif
-
-         if (proc->isKernelThread) {
-            Process_updateCmdline(proc, NULL, 0, 0);
-         } else if (!LinuxProcessList_readCmdlineFile(proc, procFd)) {
-            Process_updateCmdline(proc, statCommand, 0, strlen(statCommand));
-         }
-
-         Process_fillStarttimeBuffer(proc);
-
-         ProcessList_add(pl, proc);
-      } else {
-         if (settings->updateProcessNames && proc->state != ZOMBIE) {
-            if (proc->isKernelThread) {
-               Process_updateCmdline(proc, NULL, 0, 0);
-            } else if (!LinuxProcessList_readCmdlineFile(proc, procFd)) {
-               Process_updateCmdline(proc, statCommand, 0, strlen(statCommand));
-            }
-         }
-      }
-
-      #ifdef HAVE_DELAYACCT
-      if (ss->flags & PROCESS_FLAG_LINUX_DELAYACCT) {
-         LinuxProcessList_readDelayAcctData(this, lp);
-      }
-      #endif
-
-      if (ss->flags & PROCESS_FLAG_LINUX_CGROUP) {
-         LinuxProcessList_readCGroupFile(lp, procFd);
-      }
-
-      if (ss->flags & PROCESS_FLAG_LINUX_OOM) {
-         LinuxProcessList_readOomData(lp, procFd);
-      }
-
-      if (ss->flags & PROCESS_FLAG_LINUX_CTXT) {
-         LinuxProcessList_readCtxtData(lp, procFd);
-      }
-
-      if (ss->flags & PROCESS_FLAG_LINUX_SECATTR) {
-         LinuxProcessList_readSecattrData(lp, procFd);
-      }
-
-      if (ss->flags & PROCESS_FLAG_CWD) {
-         LinuxProcessList_readCwd(lp, procFd);
-      }
-
-      if ((ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) && this->haveAutogroup) {
-         LinuxProcessList_readAutogroup(lp, procFd);
-      }
-
-      if (!proc->cmdline && statCommand[0] &&
-          (proc->state == ZOMBIE || Process_isKernelThread(proc) || settings->showThreadNames)) {
-         Process_updateCmdline(proc, statCommand, 0, strlen(statCommand));
-      }
-
-      if (Process_isKernelThread(proc)) {
-         pl->kernelThreads++;
-      } else if (Process_isUserlandThread(proc)) {
-         pl->userlandThreads++;
-      }
-
-      /* Set at the end when we know if a new entry is a thread */
-      proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc)));
-
-      pl->totalTasks++;
-      /* runningTasks is set in LinuxProcessList_scanCPUTime() from /proc/stat */
-      proc->updated = true;
-      Compat_openatArgClose(procFd);
-      continue;
-
-      // Exception handler.
-
-errorReadingProcess:
-      {
-#ifdef HAVE_OPENAT
-         if (procFd >= 0)
-            close(procFd);
-#endif
-
-         if (preExisting) {
-            /*
-             * The only real reason for coming here (apart from Linux violating the /proc API)
-             * would be the process going away with its /proc files disappearing (!HAVE_OPENAT).
-             * However, we want to keep in the process list for now for the "highlight dying" mode.
-             */
-         } else {
-            /* A really short-lived process that we don't have full info about */
-            Process_delete((Object*)proc);
-         }
-      }
-   }
-   closedir(dir);
-   return true;
-}
-
-static inline void LinuxProcessList_scanMemoryInfo(ProcessList* this) {
-   memory_t availableMem = 0;
-   memory_t freeMem = 0;
-   memory_t totalMem = 0;
-   memory_t buffersMem = 0;
-   memory_t cachedMem = 0;
-   memory_t sharedMem = 0;
-   memory_t swapTotalMem = 0;
-   memory_t swapCacheMem = 0;
-   memory_t swapFreeMem = 0;
-   memory_t sreclaimableMem = 0;
-
-   FILE* file = fopen(PROCMEMINFOFILE, "r");
-   if (!file)
-      CRT_fatalError("Cannot open " PROCMEMINFOFILE);
-
-   char buffer[128];
-   while (fgets(buffer, sizeof(buffer), file)) {
-
-      #define tryRead(label, variable)                                       \
-         if (String_startsWith(buffer, label)) {                             \
-            memory_t parsed_;                                                \
-            if (sscanf(buffer + strlen(label), "%llu kB", &parsed_) == 1) {  \
-               (variable) = parsed_;                                         \
-            }                                                                \
-            break;                                                           \
-         } else (void) 0 /* Require a ";" after the macro use. */
-
-      switch (buffer[0]) {
-      case 'M':
-         tryRead("MemAvailable:", availableMem);
-         tryRead("MemFree:", freeMem);
-         tryRead("MemTotal:", totalMem);
-         break;
-      case 'B':
-         tryRead("Buffers:", buffersMem);
-         break;
-      case 'C':
-         tryRead("Cached:", cachedMem);
-         break;
-      case 'S':
-         switch (buffer[1]) {
-         case 'h':
-            tryRead("Shmem:", sharedMem);
-            break;
-         case 'w':
-            tryRead("SwapTotal:", swapTotalMem);
-            tryRead("SwapCached:", swapCacheMem);
-            tryRead("SwapFree:", swapFreeMem);
-            break;
-         case 'R':
-            tryRead("SReclaimable:", sreclaimableMem);
-            break;
-         }
-         break;
-      }
-
-      #undef tryRead
-   }
-
-   fclose(file);
-
-   /*
-    * Compute memory partition like procps(free)
-    *  https://gitlab.com/procps-ng/procps/-/blob/master/proc/sysinfo.c
-    *
-    * Adjustments:
-    *  - Shmem in part of Cached (see https://lore.kernel.org/patchwork/patch/648763/),
-    *    do not show twice by subtracting from Cached and do not subtract twice from used.
-    */
-   this->totalMem = totalMem;
-   this->cachedMem = cachedMem + sreclaimableMem - sharedMem;
-   this->sharedMem = sharedMem;
-   const memory_t usedDiff = freeMem + cachedMem + sreclaimableMem + buffersMem;
-   this->usedMem = (totalMem >= usedDiff) ? totalMem - usedDiff : totalMem - freeMem;
-   this->buffersMem = buffersMem;
-   this->availableMem = availableMem != 0 ? MINIMUM(availableMem, totalMem) : freeMem;
-   this->totalSwap = swapTotalMem;
-   this->usedSwap = swapTotalMem - swapFreeMem - swapCacheMem;
-   this->cachedSwap = swapCacheMem;
-}
-
-static void LinuxProcessList_scanHugePages(LinuxProcessList* this) {
-   this->totalHugePageMem = 0;
-   for (unsigned i = 0; i < HTOP_HUGEPAGE_COUNT; i++) {
-      this->usedHugePageMem[i] = MEMORY_MAX;
-   }
-
-   DIR* dir = opendir("/sys/kernel/mm/hugepages");
-   if (!dir)
-      return;
-
-   const struct dirent* entry;
-   while ((entry = readdir(dir)) != NULL) {
-      const char* name = entry->d_name;
-
-      /* Ignore all non-directories */
-      if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN)
-         continue;
-
-      if (!String_startsWith(name, "hugepages-"))
-         continue;
-
-      char* endptr;
-      unsigned long int hugePageSize = strtoul(name + strlen("hugepages-"), &endptr, 10);
-      if (!endptr || *endptr != 'k')
-         continue;
-
-      char content[64];
-      char hugePagePath[128];
-      ssize_t r;
-
-      xSnprintf(hugePagePath, sizeof(hugePagePath), "/sys/kernel/mm/hugepages/%s/nr_hugepages", name);
-      r = xReadfile(hugePagePath, content, sizeof(content));
-      if (r <= 0)
-         continue;
-
-      memory_t total = strtoull(content, NULL, 10);
-      if (total == 0)
-         continue;
-
-      xSnprintf(hugePagePath, sizeof(hugePagePath), "/sys/kernel/mm/hugepages/%s/free_hugepages", name);
-      r = xReadfile(hugePagePath, content, sizeof(content));
-      if (r <= 0)
-         continue;
-
-      memory_t free = strtoull(content, NULL, 10);
-
-      int shift = ffsl(hugePageSize) - 1 - (HTOP_HUGEPAGE_BASE_SHIFT - 10);
-      assert(shift >= 0 && shift < HTOP_HUGEPAGE_COUNT);
-
-      this->totalHugePageMem += total * hugePageSize;
-      this->usedHugePageMem[shift] = (total - free) * hugePageSize;
-   }
-
-   closedir(dir);
-}
-
-static inline void LinuxProcessList_scanZramInfo(LinuxProcessList* this) {
-   memory_t totalZram = 0;
-   memory_t usedZramComp = 0;
-   memory_t usedZramOrig = 0;
-
-   char mm_stat[34];
-   char disksize[34];
-
-   unsigned int i = 0;
-   for (;;) {
-      xSnprintf(mm_stat, sizeof(mm_stat), "/sys/block/zram%u/mm_stat", i);
-      xSnprintf(disksize, sizeof(disksize), "/sys/block/zram%u/disksize", i);
-      i++;
-      FILE* disksize_file = fopen(disksize, "r");
-      FILE* mm_stat_file = fopen(mm_stat, "r");
-      if (disksize_file == NULL || mm_stat_file == NULL) {
-         if (disksize_file) {
-            fclose(disksize_file);
-         }
-         if (mm_stat_file) {
-            fclose(mm_stat_file);
-         }
-         break;
-      }
-      memory_t size = 0;
-      memory_t orig_data_size = 0;
-      memory_t compr_data_size = 0;
-
-      if (!fscanf(disksize_file, "%llu\n", &size) ||
-          !fscanf(mm_stat_file, "    %llu       %llu", &orig_data_size, &compr_data_size)) {
-         fclose(disksize_file);
-         fclose(mm_stat_file);
-         break;
-      }
-
-      totalZram += size;
-      usedZramComp += compr_data_size;
-      usedZramOrig += orig_data_size;
-
-      fclose(disksize_file);
-      fclose(mm_stat_file);
-   }
-
-   this->zram.totalZram = totalZram / 1024;
-   this->zram.usedZramComp = usedZramComp / 1024;
-   this->zram.usedZramOrig = usedZramOrig / 1024;
-}
-
-static inline void LinuxProcessList_scanZfsArcstats(LinuxProcessList* lpl) {
-   memory_t dbufSize = 0;
-   memory_t dnodeSize = 0;
-   memory_t bonusSize = 0;
-
-   FILE* file = fopen(PROCARCSTATSFILE, "r");
-   if (file == NULL) {
-      lpl->zfs.enabled = 0;
-      return;
-   }
-   char buffer[128];
-   while (fgets(buffer, 128, file)) {
-      #define tryRead(label, variable)                                         \
-         if (String_startsWith(buffer, label)) {                               \
-            sscanf(buffer + strlen(label), " %*2u %32llu", variable);          \
-            break;                                                             \
-         } else (void) 0 /* Require a ";" after the macro use. */
-      #define tryReadFlag(label, variable, flag)                               \
-         if (String_startsWith(buffer, label)) {                               \
-            (flag) = sscanf(buffer + strlen(label), " %*2u %32llu", variable); \
-            break;                                                             \
-         } else (void) 0 /* Require a ";" after the macro use. */
-
-      switch (buffer[0]) {
-      case 'c':
-         tryRead("c_min", &lpl->zfs.min);
-         tryRead("c_max", &lpl->zfs.max);
-         tryReadFlag("compressed_size", &lpl->zfs.compressed, lpl->zfs.isCompressed);
-         break;
-      case 'u':
-         tryRead("uncompressed_size", &lpl->zfs.uncompressed);
-         break;
-      case 's':
-         tryRead("size", &lpl->zfs.size);
-         break;
-      case 'h':
-         tryRead("hdr_size", &lpl->zfs.header);
-         break;
-      case 'd':
-         tryRead("dbuf_size", &dbufSize);
-         tryRead("dnode_size", &dnodeSize);
-         break;
-      case 'b':
-         tryRead("bonus_size", &bonusSize);
-         break;
-      case 'a':
-         tryRead("anon_size", &lpl->zfs.anon);
-         break;
-      case 'm':
-         tryRead("mfu_size", &lpl->zfs.MFU);
-         tryRead("mru_size", &lpl->zfs.MRU);
-         break;
-      }
-      #undef tryRead
-      #undef tryReadFlag
-   }
-   fclose(file);
-
-   lpl->zfs.enabled = (lpl->zfs.size > 0 ? 1 : 0);
-   lpl->zfs.size    /= 1024;
-   lpl->zfs.min    /= 1024;
-   lpl->zfs.max    /= 1024;
-   lpl->zfs.MFU    /= 1024;
-   lpl->zfs.MRU    /= 1024;
-   lpl->zfs.anon   /= 1024;
-   lpl->zfs.header /= 1024;
-   lpl->zfs.other   = (dbufSize + dnodeSize + bonusSize) / 1024;
-   if ( lpl->zfs.isCompressed ) {
-      lpl->zfs.compressed /= 1024;
-      lpl->zfs.uncompressed /= 1024;
-   }
-}
-
-static inline double LinuxProcessList_scanCPUTime(ProcessList* super) {
-   LinuxProcessList* this = (LinuxProcessList*) super;
-
-   LinuxProcessList_updateCPUcount(super);
-
-   FILE* file = fopen(PROCSTATFILE, "r");
-   if (!file)
-      CRT_fatalError("Cannot open " PROCSTATFILE);
-
-   unsigned int existingCPUs = super->existingCPUs;
-   unsigned int lastAdjCpuId = 0;
-
-   for (unsigned int i = 0; i <= existingCPUs; i++) {
-      char buffer[PROC_LINE_LENGTH + 1];
-      unsigned long long int usertime, nicetime, systemtime, idletime;
-      unsigned long long int ioWait = 0, irq = 0, softIrq = 0, steal = 0, guest = 0, guestnice = 0;
-
-      const char* ok = fgets(buffer, sizeof(buffer), file);
-      if (!ok)
-         break;
-
-      // cpu fields are sorted first
-      if (!String_startsWith(buffer, "cpu"))
-         break;
-
-      // Depending on your kernel version,
-      // 5, 7, 8 or 9 of these fields will be set.
-      // The rest will remain at zero.
-      unsigned int adjCpuId;
-      if (i == 0) {
-         (void) sscanf(buffer,   "cpu  %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu",         &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice);
-         adjCpuId = 0;
-      } else {
-         unsigned int cpuid;
-         (void) sscanf(buffer, "cpu%4u %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &cpuid, &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice);
-         adjCpuId = cpuid + 1;
-      }
-
-      if (adjCpuId > super->existingCPUs)
-         break;
-
-      for (unsigned int j = lastAdjCpuId + 1; j < adjCpuId; j++) {
-         // Skipped an ID, but /proc/stat is ordered => got offline CPU
-         memset(&(this->cpuData[j]), '\0', sizeof(CPUData));
-      }
-      lastAdjCpuId = adjCpuId;
-
-      // Guest time is already accounted in usertime
-      usertime -= guest;
-      nicetime -= guestnice;
-      // Fields existing on kernels >= 2.6
-      // (and RHEL's patched kernel 2.4...)
-      unsigned long long int idlealltime = idletime + ioWait;
-      unsigned long long int systemalltime = systemtime + irq + softIrq;
-      unsigned long long int virtalltime = guest + guestnice;
-      unsigned long long int totaltime = usertime + nicetime + systemalltime + idlealltime + steal + virtalltime;
-      CPUData* cpuData = &(this->cpuData[adjCpuId]);
-      // Since we do a subtraction (usertime - guest) and cputime64_to_clock_t()
-      // used in /proc/stat rounds down numbers, it can lead to a case where the
-      // integer overflow.
-      cpuData->userPeriod = saturatingSub(usertime, cpuData->userTime);
-      cpuData->nicePeriod = saturatingSub(nicetime, cpuData->niceTime);
-      cpuData->systemPeriod = saturatingSub(systemtime, cpuData->systemTime);
-      cpuData->systemAllPeriod = saturatingSub(systemalltime, cpuData->systemAllTime);
-      cpuData->idleAllPeriod = saturatingSub(idlealltime, cpuData->idleAllTime);
-      cpuData->idlePeriod = saturatingSub(idletime, cpuData->idleTime);
-      cpuData->ioWaitPeriod = saturatingSub(ioWait, cpuData->ioWaitTime);
-      cpuData->irqPeriod = saturatingSub(irq, cpuData->irqTime);
-      cpuData->softIrqPeriod = saturatingSub(softIrq, cpuData->softIrqTime);
-      cpuData->stealPeriod = saturatingSub(steal, cpuData->stealTime);
-      cpuData->guestPeriod = saturatingSub(virtalltime, cpuData->guestTime);
-      cpuData->totalPeriod = saturatingSub(totaltime, cpuData->totalTime);
-      cpuData->userTime = usertime;
-      cpuData->niceTime = nicetime;
-      cpuData->systemTime = systemtime;
-      cpuData->systemAllTime = systemalltime;
-      cpuData->idleAllTime = idlealltime;
-      cpuData->idleTime = idletime;
-      cpuData->ioWaitTime = ioWait;
-      cpuData->irqTime = irq;
-      cpuData->softIrqTime = softIrq;
-      cpuData->stealTime = steal;
-      cpuData->guestTime = virtalltime;
-      cpuData->totalTime = totaltime;
-   }
-
-   double period = (double)this->cpuData[0].totalPeriod / super->activeCPUs;
-
-   char buffer[PROC_LINE_LENGTH + 1];
-   while (fgets(buffer, sizeof(buffer), file)) {
-      if (String_startsWith(buffer, "procs_running")) {
-         super->runningTasks = strtoul(buffer + strlen("procs_running"), NULL, 10);
-         break;
-      }
-   }
-
-   fclose(file);
-
-   return period;
-}
-
-static int scanCPUFrequencyFromSysCPUFreq(LinuxProcessList* this) {
-   unsigned int existingCPUs = this->super.existingCPUs;
-   int numCPUsWithFrequency = 0;
-   unsigned long totalFrequency = 0;
-
-   /*
-    * On some AMD and Intel CPUs read()ing scaling_cur_freq is quite slow (> 1ms). This delay
-    * accumulates for every core. For details see issue#471.
-    * If the read on CPU 0 takes longer than 500us bail out and fall back to reading the
-    * frequencies from /proc/cpuinfo.
-    * Once the condition has been met, bail out early for the next couple of scans.
-    */
-   static int timeout = 0;
-
-   if (timeout > 0) {
-      timeout--;
-      return -1;
-   }
-
-   for (unsigned int i = 0; i < existingCPUs; ++i) {
-      if (!ProcessList_isCPUonline(&this->super, i))
-         continue;
-
-      char pathBuffer[64];
-      xSnprintf(pathBuffer, sizeof(pathBuffer), "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_cur_freq", i);
-
-      struct timespec start;
-      if (i == 0)
-         clock_gettime(CLOCK_MONOTONIC, &start);
-
-      FILE* file = fopen(pathBuffer, "r");
-      if (!file)
-         return -errno;
-
-      unsigned long frequency;
-      if (fscanf(file, "%lu", &frequency) == 1) {
-         /* convert kHz to MHz */
-         frequency = frequency / 1000;
-         this->cpuData[i + 1].frequency = frequency;
-         numCPUsWithFrequency++;
-         totalFrequency += frequency;
-      }
-
-      fclose(file);
-
-      if (i == 0) {
-         struct timespec end;
-         clock_gettime(CLOCK_MONOTONIC, &end);
-         const time_t timeTakenUs = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_nsec - start.tv_nsec) / 1000;
-         if (timeTakenUs > 500) {
-            timeout = 30;
-            return -1;
-         }
-      }
-
-   }
-
-   if (numCPUsWithFrequency > 0)
-      this->cpuData[0].frequency = (double)totalFrequency / numCPUsWithFrequency;
-
-   return 0;
-}
-
-static void scanCPUFrequencyFromCPUinfo(LinuxProcessList* this) {
-   FILE* file = fopen(PROCCPUINFOFILE, "r");
-   if (file == NULL)
-      return;
-
-   unsigned int existingCPUs = this->super.existingCPUs;
-   int numCPUsWithFrequency = 0;
-   double totalFrequency = 0;
-   int cpuid = -1;
-
-   while (!feof(file)) {
-      double frequency;
-      char buffer[PROC_LINE_LENGTH];
-
-      if (fgets(buffer, PROC_LINE_LENGTH, file) == NULL)
-         break;
-
-      if (sscanf(buffer, "processor : %d", &cpuid) == 1) {
-         continue;
-      } else if (
-         (sscanf(buffer, "cpu MHz : %lf", &frequency) == 1) ||
-         (sscanf(buffer, "clock : %lfMHz", &frequency) == 1)
-      ) {
-         if (cpuid < 0 || (unsigned int)cpuid > (existingCPUs - 1)) {
-            continue;
-         }
-
-         CPUData* cpuData = &(this->cpuData[cpuid + 1]);
-         /* do not override sysfs data */
-         if (isnan(cpuData->frequency)) {
-            cpuData->frequency = frequency;
-         }
-         numCPUsWithFrequency++;
-         totalFrequency += frequency;
-      } else if (buffer[0] == '\n') {
-         cpuid = -1;
-      }
-   }
-   fclose(file);
-
-   if (numCPUsWithFrequency > 0) {
-      this->cpuData[0].frequency = totalFrequency / numCPUsWithFrequency;
-   }
-}
-
-static void LinuxProcessList_scanCPUFrequency(LinuxProcessList* this) {
-   unsigned int existingCPUs = this->super.existingCPUs;
-
-   for (unsigned int i = 0; i <= existingCPUs; i++) {
-      this->cpuData[i].frequency = NAN;
-   }
-
-   if (scanCPUFrequencyFromSysCPUFreq(this) == 0) {
-      return;
-   }
-
-   scanCPUFrequencyFromCPUinfo(this);
-}
-
-void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
-   LinuxProcessList* this = (LinuxProcessList*) super;
-   const Settings* settings = super->settings;
-
-   LinuxProcessList_scanMemoryInfo(super);
-   LinuxProcessList_scanHugePages(this);
-   LinuxProcessList_scanZfsArcstats(this);
-   LinuxProcessList_scanZramInfo(this);
-
-   double period = LinuxProcessList_scanCPUTime(super);
-
-   if (settings->showCPUFrequency) {
-      LinuxProcessList_scanCPUFrequency(this);
-   }
-
-   #ifdef HAVE_SENSORS_SENSORS_H
-   if (settings->showCPUTemperature)
-      LibSensors_getCPUTemperatures(this->cpuData, this->super.existingCPUs, this->super.activeCPUs);
-   #endif
-
-   // in pause mode only gather global data for meters (CPU/memory/...)
-   if (pauseProcessUpdate) {
-      return;
-   }
-
-   if (settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) {
-      // Refer to sched(7) 'autogroup feature' section
-      // The kernel feature can be enabled/disabled through procfs at
-      // any time, so check for it at the start of each sample - only
-      // read from per-process procfs files if it's globally enabled.
-      this->haveAutogroup = LinuxProcess_isAutogroupEnabled();
-   } else {
-      this->haveAutogroup = false;
-   }
-
-   /* PROCDIR is an absolute path */
-   assert(PROCDIR[0] == '/');
-#ifdef HAVE_OPENAT
-   openat_arg_t rootFd = AT_FDCWD;
-#else
-   openat_arg_t rootFd = "";
-#endif
-
-   LinuxProcessList_recurseProcTree(this, rootFd, PROCDIR, NULL, period);
-}
-
-bool ProcessList_isCPUonline(const ProcessList* super, unsigned int id) {
-   assert(id < super->existingCPUs);
-
-   const LinuxProcessList* this = (const LinuxProcessList*) super;
-   return this->cpuData[id + 1].online;
-}
diff --git a/linux/LinuxProcessList.h b/linux/LinuxProcessList.h
deleted file mode 100644
index 6c2f7db..0000000
--- a/linux/LinuxProcessList.h
+++ /dev/null
@@ -1,126 +0,0 @@
-#ifndef HEADER_LinuxProcessList
-#define HEADER_LinuxProcessList
-/*
-htop - LinuxProcessList.h
-(C) 2014 Hisham H. Muhammad
-Released under the GNU GPLv2+, see the COPYING file
-in the source distribution for its full text.
-*/
-
-#include "config.h"
-
-#include <stdbool.h>
-#include <sys/types.h>
-
-#include "Hashtable.h"
-#include "ProcessList.h"
-#include "UsersTable.h"
-#include "ZramStats.h"
-#include "zfs/ZfsArcStats.h"
-
-#define HTOP_HUGEPAGE_BASE_SHIFT 16
-#define HTOP_HUGEPAGE_COUNT 24
-
-typedef struct CPUData_ {
-   unsigned long long int totalTime;
-   unsigned long long int userTime;
-   unsigned long long int systemTime;
-   unsigned long long int systemAllTime;
-   unsigned long long int idleAllTime;
-   unsigned long long int idleTime;
-   unsigned long long int niceTime;
-   unsigned long long int ioWaitTime;
-   unsigned long long int irqTime;
-   unsigned long long int softIrqTime;
-   unsigned long long int stealTime;
-   unsigned long long int guestTime;
-
-   unsigned long long int totalPeriod;
-   unsigned long long int userPeriod;
-   unsigned long long int systemPeriod;
-   unsigned long long int systemAllPeriod;
-   unsigned long long int idleAllPeriod;
-   unsigned long long int idlePeriod;
-   unsigned long long int nicePeriod;
-   unsigned long long int ioWaitPeriod;
-   unsigned long long int irqPeriod;
-   unsigned long long int softIrqPeriod;
-   unsigned long long int stealPeriod;
-   unsigned long long int guestPeriod;
-
-   double frequency;
-
-   #ifdef HAVE_SENSORS_SENSORS_H
-   double temperature;
-   #endif
-
-   bool online;
-} CPUData;
-
-typedef struct TtyDriver_ {
-   char* path;
-   unsigned int major;
-   unsigned int minorFrom;
-   unsigned int minorTo;
-} TtyDriver;
-
-typedef struct LinuxProcessList_ {
-   ProcessList super;
-
-   CPUData* cpuData;
-
-   TtyDriver* ttyDrivers;
-   bool haveSmapsRollup;
-   bool haveAutogroup;
-
-   #ifdef HAVE_DELAYACCT
-   struct nl_sock* netlink_socket;
-   int netlink_family;
-   #endif
-
-   memory_t totalHugePageMem;
-   memory_t usedHugePageMem[HTOP_HUGEPAGE_COUNT];
-
-   memory_t availableMem;
-
-   ZfsArcStats zfs;
-   ZramStats zram;
-} LinuxProcessList;
-
-#ifndef PROCDIR
-#define PROCDIR "/proc"
-#endif
-
-#ifndef PROCCPUINFOFILE
-#define PROCCPUINFOFILE PROCDIR "/cpuinfo"
-#endif
-
-#ifndef PROCSTATFILE
-#define PROCSTATFILE PROCDIR "/stat"
-#endif
-
-#ifndef PROCMEMINFOFILE
-#define PROCMEMINFOFILE PROCDIR "/meminfo"
-#endif
-
-#ifndef PROCARCSTATSFILE
-#define PROCARCSTATSFILE PROCDIR "/spl/kstat/zfs/arcstats"
-#endif
-
-#ifndef PROCTTYDRIVERSFILE
-#define PROCTTYDRIVERSFILE PROCDIR "/tty/drivers"
-#endif
-
-#ifndef PROC_LINE_LENGTH
-#define PROC_LINE_LENGTH 4096
-#endif
-
-ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId);
-
-void ProcessList_delete(ProcessList* pl);
-
-void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate);
-
-bool ProcessList_isCPUonline(const ProcessList* super, unsigned int id);
-
-#endif
diff --git a/linux/LinuxProcessTable.c b/linux/LinuxProcessTable.c
new file mode 100644
index 0000000..039a64e
--- /dev/null
+++ b/linux/LinuxProcessTable.c
@@ -0,0 +1,1668 @@
+/*
+htop - LinuxProcessTable.c
+(C) 2014 Hisham H. Muhammad
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include "linux/LinuxProcessTable.h"
+
+#include <assert.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <math.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#ifdef HAVE_DELAYACCT
+#include <linux/netlink.h>
+#include <linux/taskstats.h>
+#include <netlink/attr.h>
+#include <netlink/handlers.h>
+#include <netlink/msg.h>
+#include <netlink/netlink.h>
+#include <netlink/socket.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/ctrl.h>
+#endif
+
+#include "Compat.h"
+#include "Hashtable.h"
+#include "Machine.h"
+#include "Macros.h"
+#include "Object.h"
+#include "Process.h"
+#include "Row.h"
+#include "RowField.h"
+#include "Scheduling.h"
+#include "Settings.h"
+#include "Table.h"
+#include "UsersTable.h"
+#include "XUtils.h"
+#include "linux/CGroupUtils.h"
+#include "linux/LinuxMachine.h"
+#include "linux/LinuxProcess.h"
+#include "linux/Platform.h" // needed for GNU/hurd to get PATH_MAX  // IWYU pragma: keep
+
+#if defined(MAJOR_IN_MKDEV)
+#include <sys/mkdev.h>
+#elif defined(MAJOR_IN_SYSMACROS)
+#include <sys/sysmacros.h>
+#endif
+
+/* Not exposed yet. Defined at include/linux/sched.h */
+#ifndef PF_KTHREAD
+#define PF_KTHREAD 0x00200000
+#endif
+
+static FILE* fopenat(openat_arg_t openatArg, const char* pathname, const char* mode) {
+   assert(String_eq(mode, "r")); /* only currently supported mode */
+
+   int fd = Compat_openat(openatArg, pathname, O_RDONLY);
+   if (fd < 0)
+      return NULL;
+
+   FILE* stream = fdopen(fd, mode);
+   if (!stream)
+      close(fd);
+
+   return stream;
+}
+
+static inline uint64_t fast_strtoull_dec(char** str, int maxlen) {
+   register uint64_t result = 0;
+
+   if (!maxlen)
+      --maxlen;
+
+   while (maxlen-- && **str >= '0' && **str <= '9') {
+      result *= 10;
+      result += **str - '0';
+      (*str)++;
+   }
+
+   return result;
+}
+
+static inline uint64_t fast_strtoull_hex(char** str, int maxlen) {
+   register uint64_t result = 0;
+   register int nibble, letter;
+   const long valid_mask = 0x03FF007E;
+
+   if (!maxlen)
+      --maxlen;
+
+   while (maxlen--) {
+      nibble = (unsigned char)**str;
+      if (!(valid_mask & (1 << (nibble & 0x1F))))
+         break;
+      if ((nibble < '0') || (nibble & ~0x20) > 'F')
+         break;
+      letter = (nibble & 0x40) ? 'A' - '9' - 1 : 0;
+      nibble &=~0x20; // to upper
+      nibble ^= 0x10; // switch letters and digits
+      nibble -= letter;
+      nibble &= 0x0f;
+      result <<= 4;
+      result += (uint64_t)nibble;
+      (*str)++;
+   }
+
+   return result;
+}
+
+static int sortTtyDrivers(const void* va, const void* vb) {
+   const TtyDriver* a = (const TtyDriver*) va;
+   const TtyDriver* b = (const TtyDriver*) vb;
+
+   int r = SPACESHIP_NUMBER(a->major, b->major);
+   if (r)
+      return r;
+
+   return SPACESHIP_NUMBER(a->minorFrom, b->minorFrom);
+}
+
+static void LinuxProcessTable_initTtyDrivers(LinuxProcessTable* this) {
+   TtyDriver* ttyDrivers;
+
+   char buf[16384];
+   ssize_t r = xReadfile(PROCTTYDRIVERSFILE, buf, sizeof(buf));
+   if (r < 0)
+      return;
+
+   int numDrivers = 0;
+   int allocd = 10;
+   ttyDrivers = xMallocArray(allocd, sizeof(TtyDriver));
+   char* at = buf;
+   while (*at != '\0') {
+      at = strchr(at, ' ');    // skip first token
+      while (*at == ' ') at++; // skip spaces
+      const char* token = at;  // mark beginning of path
+      at = strchr(at, ' ');    // find end of path
+      *at = '\0'; at++;        // clear and skip
+      ttyDrivers[numDrivers].path = xStrdup(token); // save
+      while (*at == ' ') at++; // skip spaces
+      token = at;              // mark beginning of major
+      at = strchr(at, ' ');    // find end of major
+      *at = '\0'; at++;        // clear and skip
+      ttyDrivers[numDrivers].major = atoi(token); // save
+      while (*at == ' ') at++; // skip spaces
+      token = at;              // mark beginning of minorFrom
+      while (*at >= '0' && *at <= '9') at++; //find end of minorFrom
+      if (*at == '-') {        // if has range
+         *at = '\0'; at++;        // clear and skip
+         ttyDrivers[numDrivers].minorFrom = atoi(token); // save
+         token = at;              // mark beginning of minorTo
+         at = strchr(at, ' ');    // find end of minorTo
+         *at = '\0'; at++;        // clear and skip
+         ttyDrivers[numDrivers].minorTo = atoi(token); // save
+      } else {                 // no range
+         *at = '\0'; at++;        // clear and skip
+         ttyDrivers[numDrivers].minorFrom = atoi(token); // save
+         ttyDrivers[numDrivers].minorTo = atoi(token); // save
+      }
+      at = strchr(at, '\n');   // go to end of line
+      at++;                    // skip
+      numDrivers++;
+      if (numDrivers == allocd) {
+         allocd += 10;
+         ttyDrivers = xReallocArray(ttyDrivers, allocd, sizeof(TtyDriver));
+      }
+   }
+   numDrivers++;
+   ttyDrivers = xRealloc(ttyDrivers, sizeof(TtyDriver) * numDrivers);
+   ttyDrivers[numDrivers - 1].path = NULL;
+   qsort(ttyDrivers, numDrivers - 1, sizeof(TtyDriver), sortTtyDrivers);
+   this->ttyDrivers = ttyDrivers;
+}
+
+#ifdef HAVE_DELAYACCT
+
+static void LinuxProcessTable_initNetlinkSocket(LinuxProcessTable* this) {
+   this->netlink_socket = nl_socket_alloc();
+   if (this->netlink_socket == NULL) {
+      return;
+   }
+   if (nl_connect(this->netlink_socket, NETLINK_GENERIC) < 0) {
+      return;
+   }
+   this->netlink_family = genl_ctrl_resolve(this->netlink_socket, TASKSTATS_GENL_NAME);
+}
+
+#endif
+
+ProcessTable* ProcessTable_new(Machine* host, Hashtable* pidMatchList) {
+   LinuxProcessTable* this = xCalloc(1, sizeof(LinuxProcessTable));
+   Object_setClass(this, Class(ProcessTable));
+
+   ProcessTable* super = &this->super;
+   ProcessTable_init(super, Class(LinuxProcess), host, pidMatchList);
+
+   LinuxProcessTable_initTtyDrivers(this);
+
+   // Test /proc/PID/smaps_rollup availability (faster to parse, Linux 4.14+)
+   this->haveSmapsRollup = (access(PROCDIR "/self/smaps_rollup", R_OK) == 0);
+
+   return super;
+}
+
+void ProcessTable_delete(Object* cast) {
+   LinuxProcessTable* this = (LinuxProcessTable*) cast;
+   ProcessTable_done(&this->super);
+   if (this->ttyDrivers) {
+      for (int i = 0; this->ttyDrivers[i].path; i++) {
+         free(this->ttyDrivers[i].path);
+      }
+      free(this->ttyDrivers);
+   }
+   #ifdef HAVE_DELAYACCT
+   if (this->netlink_socket) {
+      nl_close(this->netlink_socket);
+      nl_socket_free(this->netlink_socket);
+   }
+   #endif
+   free(this);
+}
+
+static inline unsigned long long LinuxProcessTable_adjustTime(const LinuxMachine* lhost, unsigned long long t) {
+   return t * 100 / lhost->jiffies;
+}
+
+/* Taken from: https://github.com/torvalds/linux/blob/64570fbc14f8d7cb3fe3995f20e26bc25ce4b2cc/fs/proc/array.c#L120 */
+static inline ProcessState LinuxProcessTable_getProcessState(char state) {
+   switch (state) {
+      case 'S': return SLEEPING;
+      case 'X': return DEFUNCT;
+      case 'Z': return ZOMBIE;
+      case 't': return TRACED;
+      case 'T': return STOPPED;
+      case 'D': return UNINTERRUPTIBLE_WAIT;
+      case 'R': return RUNNING;
+      case 'P': return BLOCKED;
+      case 'I': return IDLE;
+      default: return UNKNOWN;
+   }
+}
+
+static bool LinuxProcessTable_readStatFile(LinuxProcess* lp, openat_arg_t procFd, const LinuxMachine* lhost, bool scanMainThread, char* command, size_t commLen) {
+   Process* process = &lp->super;
+
+   char buf[MAX_READ + 1];
+   char path[22] = "stat";
+   if (scanMainThread) {
+      xSnprintf(path, sizeof(path), "task/%"PRIi32"/stat", (int32_t)Process_getPid(process));
+   }
+   ssize_t r = xReadfileat(procFd, path, buf, sizeof(buf));
+   if (r < 0)
+      return false;
+
+   /* (1) pid   -  %d */
+   assert(Process_getPid(process) == atoi(buf));
+   char* location = strchr(buf, ' ');
+   if (!location)
+      return false;
+
+   /* (2) comm  -  (%s) */
+   location += 2;
+   char* end = strrchr(location, ')');
+   if (!end)
+      return false;
+
+   String_safeStrncpy(command, location, MINIMUM((size_t)(end - location + 1), commLen));
+
+   location = end + 2;
+
+   /* (3) state  -  %c */
+   process->state = LinuxProcessTable_getProcessState(location[0]);
+   location += 2;
+
+   /* (4) ppid  -  %d */
+   Process_setParent(process, strtol(location, &location, 10));
+   location += 1;
+
+   /* (5) pgrp  -  %d */
+   process->pgrp = strtol(location, &location, 10);
+   location += 1;
+
+   /* (6) session  -  %d */
+   process->session = strtol(location, &location, 10);
+   location += 1;
+
+   /* (7) tty_nr  -  %d */
+   process->tty_nr = strtoul(location, &location, 10);
+   location += 1;
+
+   /* (8) tpgid  -  %d */
+   process->tpgid = strtol(location, &location, 10);
+   location += 1;
+
+   /* (9) flags  -  %u */
+   lp->flags = strtoul(location, &location, 10);
+   location += 1;
+
+   /* (10) minflt  -  %lu */
+   process->minflt = strtoull(location, &location, 10);
+   location += 1;
+
+   /* (11) cminflt  -  %lu */
+   lp->cminflt = strtoull(location, &location, 10);
+   location += 1;
+
+   /* (12) majflt  -  %lu */
+   process->majflt = strtoull(location, &location, 10);
+   location += 1;
+
+   /* (13) cmajflt  -  %lu */
+   lp->cmajflt = strtoull(location, &location, 10);
+   location += 1;
+
+   /* (14) utime  -  %lu */
+   lp->utime = LinuxProcessTable_adjustTime(lhost, strtoull(location, &location, 10));
+   location += 1;
+
+   /* (15) stime  -  %lu */
+   lp->stime = LinuxProcessTable_adjustTime(lhost, strtoull(location, &location, 10));
+   location += 1;
+
+   /* (16) cutime  -  %ld */
+   lp->cutime = LinuxProcessTable_adjustTime(lhost, strtoull(location, &location, 10));
+   location += 1;
+
+   /* (17) cstime  -  %ld */
+   lp->cstime = LinuxProcessTable_adjustTime(lhost, strtoull(location, &location, 10));
+   location += 1;
+
+   /* (18) priority  -  %ld */
+   process->priority = strtol(location, &location, 10);
+   location += 1;
+
+   /* (19) nice  -  %ld */
+   process->nice = strtol(location, &location, 10);
+   location += 1;
+
+   /* (20) num_threads  -  %ld */
+   process->nlwp = strtol(location, &location, 10);
+   location += 1;
+
+   /* Skip (21) itrealvalue  -  %ld */
+   location = strchr(location, ' ') + 1;
+
+   /* (22) starttime  -  %llu */
+   if (process->starttime_ctime == 0) {
+      process->starttime_ctime = lhost->boottime + LinuxProcessTable_adjustTime(lhost, strtoll(location, &location, 10)) / 100;
+   } else {
+      location = strchr(location, ' ');
+   }
+   location += 1;
+
+   /* Skip (23) - (38) */
+   for (int i = 0; i < 16; i++) {
+      location = strchr(location, ' ') + 1;
+   }
+
+   assert(location != NULL);
+
+   /* (39) processor  -  %d */
+   process->processor = strtol(location, &location, 10);
+
+   /* Ignore further fields */
+
+   process->time = lp->utime + lp->stime;
+
+   return true;
+}
+
+static bool LinuxProcessTable_readStatusFile(Process* process, openat_arg_t procFd) {
+   LinuxProcess* lp = (LinuxProcess*) process;
+
+   unsigned long ctxt = 0;
+#ifdef HAVE_VSERVER
+   lp->vxid = 0;
+#endif
+
+   FILE* statusfile = fopenat(procFd, "status", "r");
+   if (!statusfile)
+      return false;
+
+   char buffer[PROC_LINE_LENGTH + 1];
+
+   while (fgets(buffer, sizeof(buffer), statusfile)) {
+
+      if (String_startsWith(buffer, "NSpid:")) {
+         const char* ptr = buffer;
+         int pid_ns_count = 0;
+         while (*ptr && *ptr != '\n' && !isdigit((unsigned char)*ptr))
+            ++ptr;
+
+         while (*ptr && *ptr != '\n') {
+            if (isdigit(*ptr))
+               pid_ns_count++;
+            while (isdigit((unsigned char)*ptr))
+               ++ptr;
+            while (*ptr && *ptr != '\n' && !isdigit((unsigned char)*ptr))
+               ++ptr;
+         }
+
+         if (pid_ns_count > 1)
+            process->isRunningInContainer = true;
+
+      } else if (String_startsWith(buffer, "CapPrm:")) {
+         char* ptr = buffer + strlen("CapPrm:");
+         while (*ptr == ' ' || *ptr == '\t')
+            ptr++;
+
+         uint64_t cap_permitted = fast_strtoull_hex(&ptr, 16);
+         process->elevated_priv = cap_permitted != 0 && process->st_uid != 0;
+
+      } else if (String_startsWith(buffer, "voluntary_ctxt_switches:")) {
+         unsigned long vctxt;
+         int ok = sscanf(buffer, "voluntary_ctxt_switches:\t%lu", &vctxt);
+         if (ok >= 1) {
+            ctxt += vctxt;
+         }
+
+      } else if (String_startsWith(buffer, "nonvoluntary_ctxt_switches:")) {
+         unsigned long nvctxt;
+         int ok = sscanf(buffer, "nonvoluntary_ctxt_switches:\t%lu", &nvctxt);
+         if (ok >= 1) {
+            ctxt += nvctxt;
+         }
+
+#ifdef HAVE_VSERVER
+      } else if (String_startsWith(buffer, "VxID:")) {
+         int vxid;
+         int ok = sscanf(buffer, "VxID:\t%32d", &vxid);
+         if (ok >= 1) {
+            lp->vxid = vxid;
+         }
+#ifdef HAVE_ANCIENT_VSERVER
+      } else if (String_startsWith(buffer, "s_context:")) {
+         int vxid;
+         int ok = sscanf(buffer, "s_context:\t%32d", &vxid);
+         if (ok >= 1) {
+            lp->vxid = vxid;
+         }
+#endif /* HAVE_ANCIENT_VSERVER */
+#endif /* HAVE_VSERVER */
+      }
+   }
+
+   fclose(statusfile);
+
+   lp->ctxt_diff = (ctxt > lp->ctxt_total) ? (ctxt - lp->ctxt_total) : 0;
+   lp->ctxt_total = ctxt;
+
+   return true;
+}
+
+static bool LinuxProcessTable_updateUser(const Machine* host, Process* process, openat_arg_t procFd) {
+   struct stat sstat;
+#ifdef HAVE_OPENAT
+   int statok = fstat(procFd, &sstat);
+#else
+   int statok = stat(procFd, &sstat);
+#endif
+   if (statok == -1)
+      return false;
+
+   if (process->st_uid != sstat.st_uid) {
+      process->st_uid = sstat.st_uid;
+      process->user = UsersTable_getRef(host->usersTable, sstat.st_uid);
+   }
+
+   return true;
+}
+
+static void LinuxProcessTable_readIoFile(LinuxProcess* lp, openat_arg_t procFd, bool scanMainThread) {
+   Process* process = &lp->super;
+   const Machine* host = process->super.host;
+   char path[20] = "io";
+   char buffer[1024];
+   if (scanMainThread) {
+      xSnprintf(path, sizeof(path), "task/%"PRIi32"/io", (int32_t)Process_getPid(process));
+   }
+   ssize_t r = xReadfileat(procFd, path, buffer, sizeof(buffer));
+   if (r < 0) {
+      lp->io_rate_read_bps = NAN;
+      lp->io_rate_write_bps = NAN;
+      lp->io_rchar = ULLONG_MAX;
+      lp->io_wchar = ULLONG_MAX;
+      lp->io_syscr = ULLONG_MAX;
+      lp->io_syscw = ULLONG_MAX;
+      lp->io_read_bytes = ULLONG_MAX;
+      lp->io_write_bytes = ULLONG_MAX;
+      lp->io_cancelled_write_bytes = ULLONG_MAX;
+      lp->io_last_scan_time_ms = host->realtimeMs;
+      return;
+   }
+
+   unsigned long long last_read = lp->io_read_bytes;
+   unsigned long long last_write = lp->io_write_bytes;
+   unsigned long long time_delta = saturatingSub(host->realtimeMs, lp->io_last_scan_time_ms);
+
+   // Note: Linux Kernel documentation states that /proc/<pid>/io may be racy
+   // on 32-bit machines. (Documentation/filesystems/proc.rst)
+
+   char* buf = buffer;
+   const char* line;
+   while ((line = strsep(&buf, "\n")) != NULL) {
+      switch (line[0]) {
+         case 'r':
+            if (line[1] == 'c' && String_startsWith(line + 2, "har: ")) {
+               lp->io_rchar = strtoull(line + 7, NULL, 10);
+            } else if (String_startsWith(line + 1, "ead_bytes: ")) {
+               lp->io_read_bytes = strtoull(line + 12, NULL, 10);
+               lp->io_rate_read_bps = time_delta ? saturatingSub(lp->io_read_bytes, last_read) * /*ms to s*/1000. / time_delta : NAN;
+            }
+            break;
+         case 'w':
+            if (line[1] == 'c' && String_startsWith(line + 2, "har: ")) {
+               lp->io_wchar = strtoull(line + 7, NULL, 10);
+            } else if (String_startsWith(line + 1, "rite_bytes: ")) {
+               lp->io_write_bytes = strtoull(line + 13, NULL, 10);
+               lp->io_rate_write_bps = time_delta ? saturatingSub(lp->io_write_bytes, last_write) * /*ms to s*/1000. / time_delta : NAN;
+            }
+            break;
+         case 's':
+            if (line[4] == 'r' && String_startsWith(line + 1, "yscr: ")) {
+               lp->io_syscr = strtoull(line + 7, NULL, 10);
+            } else if (String_startsWith(line + 1, "yscw: ")) {
+               lp->io_syscw = strtoull(line + 7, NULL, 10);
+            }
+            break;
+         case 'c':
+            if (String_startsWith(line + 1, "ancelled_write_bytes: ")) {
+               lp->io_cancelled_write_bytes = strtoull(line + 23, NULL, 10);
+            }
+      }
+   }
+
+   lp->io_last_scan_time_ms = host->realtimeMs;
+}
+
+typedef struct LibraryData_ {
+   uint64_t size;
+   bool exec;
+} LibraryData;
+
+static void LinuxProcessTable_calcLibSize_helper(ATTR_UNUSED ht_key_t key, void* value, void* data) {
+   if (!data)
+      return;
+
+   if (!value)
+      return;
+
+   const LibraryData* v = (const LibraryData*)value;
+   uint64_t* d = (uint64_t*)data;
+   if (!v->exec)
+      return;
+
+   *d += v->size;
+}
+
+static void LinuxProcessTable_readMaps(LinuxProcess* process, openat_arg_t procFd, const LinuxMachine* host, bool calcSize, bool checkDeletedLib) {
+   Process* proc = (Process*)process;
+
+   proc->usesDeletedLib = false;
+
+   FILE* mapsfile = fopenat(procFd, "maps", "r");
+   if (!mapsfile)
+      return;
+
+   Hashtable* ht = NULL;
+   if (calcSize)
+      ht = Hashtable_new(64, true);
+
+   char buffer[1024];
+   while (fgets(buffer, sizeof(buffer), mapsfile)) {
+      uint64_t map_start;
+      uint64_t map_end;
+      bool map_execute;
+      unsigned int map_devmaj;
+      unsigned int map_devmin;
+      uint64_t map_inode;
+
+      // Short circuit test: Look for a slash
+      if (!strchr(buffer, '/'))
+         continue;
+
+      // Parse format: "%Lx-%Lx %4s %x %2x:%2x %Ld"
+      char* readptr = buffer;
+
+      map_start = fast_strtoull_hex(&readptr, 16);
+      if ('-' != *readptr++)
+         continue;
+
+      map_end = fast_strtoull_hex(&readptr, 16);
+      if (' ' != *readptr++)
+         continue;
+
+      if (!readptr[0] || !readptr[1] || !readptr[2] || !readptr[3])
+         continue;
+
+      map_execute = (readptr[2] == 'x');
+      readptr += 4;
+      if (' ' != *readptr++)
+         continue;
+
+      while (*readptr > ' ')
+         readptr++; // Skip parsing this hex value
+      if (' ' != *readptr++)
+         continue;
+
+      map_devmaj = fast_strtoull_hex(&readptr, 4);
+      if (':' != *readptr++)
+         continue;
+
+      map_devmin = fast_strtoull_hex(&readptr, 4);
+      if (' ' != *readptr++)
+         continue;
+
+      //Minor shortcut: Once we know there's no file for this region, we skip
+      if (!map_devmaj && !map_devmin)
+         continue;
+
+      map_inode = fast_strtoull_dec(&readptr, 20);
+      if (!map_inode)
+         continue;
+
+      if (calcSize) {
+         LibraryData* libdata = Hashtable_get(ht, map_inode);
+         if (!libdata) {
+            libdata = xCalloc(1, sizeof(LibraryData));
+            Hashtable_put(ht, map_inode, libdata);
+         }
+
+         libdata->size += map_end - map_start;
+         libdata->exec |= map_execute;
+      }
+
+      if (checkDeletedLib && map_execute && !proc->usesDeletedLib) {
+         while (*readptr == ' ')
+            readptr++;
+
+         if (*readptr != '/')
+            continue;
+
+         if (String_startsWith(readptr, "/memfd:"))
+            continue;
+
+         /* Virtualbox maps /dev/zero for memory allocation. That results in
+          * false positive, so ignore. */
+         if (String_eq(readptr, "/dev/zero (deleted)\n"))
+            continue;
+
+         if (strstr(readptr, " (deleted)\n")) {
+            proc->usesDeletedLib = true;
+            if (!calcSize)
+               break;
+         }
+      }
+   }
+
+   fclose(mapsfile);
+
+   if (calcSize) {
+      uint64_t total_size = 0;
+      Hashtable_foreach(ht, LinuxProcessTable_calcLibSize_helper, &total_size);
+
+      Hashtable_delete(ht);
+
+      process->m_lrs = total_size / host->pageSize;
+   }
+}
+
+static bool LinuxProcessTable_readStatmFile(LinuxProcess* process, openat_arg_t procFd, const LinuxMachine* host) {
+   FILE* statmfile = fopenat(procFd, "statm", "r");
+   if (!statmfile)
+      return false;
+
+   long int dummy, dummy2;
+
+   int r = fscanf(statmfile, "%ld %ld %ld %ld %ld %ld %ld",
+                  &process->super.m_virt,
+                  &process->super.m_resident,
+                  &process->m_share,
+                  &process->m_trs,
+                  &dummy, /* unused since Linux 2.6; always 0 */
+                  &process->m_drs,
+                  &dummy2); /* unused since Linux 2.6; always 0 */
+   fclose(statmfile);
+
+   if (r == 7) {
+      process->super.m_virt *= host->pageSizeKB;
+      process->super.m_resident *= host->pageSizeKB;
+
+      process->m_priv = process->super.m_resident - (process->m_share * host->pageSizeKB);
+   }
+
+   return r == 7;
+}
+
+static bool LinuxProcessTable_readSmapsFile(LinuxProcess* process, openat_arg_t procFd, bool haveSmapsRollup) {
+   //http://elixir.free-electrons.com/linux/v4.10/source/fs/proc/task_mmu.c#L719
+   //kernel will return data in chunks of size PAGE_SIZE or less.
+   FILE* f = fopenat(procFd, haveSmapsRollup ? "smaps_rollup" : "smaps", "r");
+   if (!f)
+      return false;
+
+   process->m_pss   = 0;
+   process->m_swap  = 0;
+   process->m_psswp = 0;
+
+   char buffer[256];
+   while (fgets(buffer, sizeof(buffer), f)) {
+      if (!strchr(buffer, '\n')) {
+         // Partial line, skip to end of this line
+         while (fgets(buffer, sizeof(buffer), f)) {
+            if (strchr(buffer, '\n')) {
+               break;
+            }
+         }
+         continue;
+      }
+
+      if (String_startsWith(buffer, "Pss:")) {
+         process->m_pss += strtol(buffer + 4, NULL, 10);
+      } else if (String_startsWith(buffer, "Swap:")) {
+         process->m_swap += strtol(buffer + 5, NULL, 10);
+      } else if (String_startsWith(buffer, "SwapPss:")) {
+         process->m_psswp += strtol(buffer + 8, NULL, 10);
+      }
+   }
+
+   fclose(f);
+   return true;
+}
+
+#ifdef HAVE_OPENVZ
+
+static void LinuxProcessTable_readOpenVZData(LinuxProcess* process, openat_arg_t procFd) {
+   if (access(PROCDIR "/vz", R_OK) != 0) {
+      free(process->ctid);
+      process->ctid = NULL;
+      process->vpid = Process_getPid(&process->super);
+      return;
+   }
+
+   FILE* file = fopenat(procFd, "status", "r");
+   if (!file) {
+      free(process->ctid);
+      process->ctid = NULL;
+      process->vpid = Process_getPid(&process->super);
+      return;
+   }
+
+   bool foundEnvID = false;
+   bool foundVPid = false;
+   char linebuf[256];
+   while (fgets(linebuf, sizeof(linebuf), file) != NULL) {
+      if (strchr(linebuf, '\n') == NULL) {
+         // Partial line, skip to end of this line
+         while (fgets(linebuf, sizeof(linebuf), file) != NULL) {
+            if (strchr(linebuf, '\n') != NULL) {
+               break;
+            }
+         }
+         continue;
+      }
+
+      char* name_value_sep = strchr(linebuf, ':');
+      if (name_value_sep == NULL) {
+         continue;
+      }
+
+      int field;
+      if (0 == strncasecmp(linebuf, "envID", name_value_sep - linebuf)) {
+         field = 1;
+      } else if (0 == strncasecmp(linebuf, "VPid", name_value_sep - linebuf)) {
+         field = 2;
+      } else {
+         continue;
+      }
+
+      do {
+         name_value_sep++;
+      } while (*name_value_sep != '\0' && *name_value_sep <= 32);
+
+      char* value_end = name_value_sep;
+
+      while (*value_end > 32) {
+         value_end++;
+      }
+
+      if (name_value_sep == value_end) {
+         continue;
+      }
+
+      *value_end = '\0';
+
+      switch (field) {
+         case 1:
+            foundEnvID = true;
+            if (!String_eq(name_value_sep, process->ctid ? process->ctid : ""))
+               free_and_xStrdup(&process->ctid, name_value_sep);
+            break;
+         case 2:
+            foundVPid = true;
+            process->vpid = strtoul(name_value_sep, NULL, 0);
+            break;
+         default:
+            //Sanity Check: Should never reach here, or the implementation is missing something!
+            assert(false && "OpenVZ handling: Unimplemented case for field handling reached.");
+      }
+   }
+
+   fclose(file);
+
+   if (!foundEnvID) {
+      free(process->ctid);
+      process->ctid = NULL;
+   }
+
+   if (!foundVPid) {
+      process->vpid = Process_getPid(&process->super);
+   }
+}
+
+#endif
+
+static void LinuxProcessTable_readCGroupFile(LinuxProcess* process, openat_arg_t procFd) {
+   FILE* file = fopenat(procFd, "cgroup", "r");
+   if (!file) {
+      if (process->cgroup) {
+         free(process->cgroup);
+         process->cgroup = NULL;
+      }
+      if (process->cgroup_short) {
+         free(process->cgroup_short);
+         process->cgroup_short = NULL;
+      }
+      if (process->container_short) {
+         free(process->container_short);
+         process->container_short = NULL;
+      }
+      return;
+   }
+   char output[PROC_LINE_LENGTH + 1];
+   output[0] = '\0';
+   char* at = output;
+   int left = PROC_LINE_LENGTH;
+   while (!feof(file) && left > 0) {
+      char buffer[PROC_LINE_LENGTH + 1];
+      const char* ok = fgets(buffer, PROC_LINE_LENGTH, file);
+      if (!ok)
+         break;
+
+      char* group = buffer;
+      for (size_t i = 0; i < 2; i++) {
+         group = String_strchrnul(group, ':');
+         if (!*group)
+            break;
+         group++;
+      }
+
+      char* eol = String_strchrnul(group, '\n');
+      *eol = '\0';
+
+      if (at != output) {
+         *at = ';';
+         at++;
+         left--;
+      }
+      int wrote = snprintf(at, left, "%s", group);
+      left -= wrote;
+   }
+   fclose(file);
+
+   bool changed = !process->cgroup || !String_eq(process->cgroup, output);
+
+   Row_updateFieldWidth(CGROUP, strlen(output));
+   free_and_xStrdup(&process->cgroup, output);
+
+   if (!changed) {
+      if (process->cgroup_short) {
+         Row_updateFieldWidth(CCGROUP, strlen(process->cgroup_short));
+      } else {
+         //CCGROUP is alias to normal CGROUP if shortening fails
+         Row_updateFieldWidth(CCGROUP, strlen(process->cgroup));
+      }
+      if (process->container_short) {
+         Row_updateFieldWidth(CONTAINER, strlen(process->container_short));
+      } else {
+         Row_updateFieldWidth(CONTAINER, strlen("N/A"));
+      }
+      return;
+   }
+
+   char* cgroup_short = CGroup_filterName(process->cgroup);
+   if (cgroup_short) {
+      Row_updateFieldWidth(CCGROUP, strlen(cgroup_short));
+      free_and_xStrdup(&process->cgroup_short, cgroup_short);
+      free(cgroup_short);
+   } else {
+      //CCGROUP is alias to normal CGROUP if shortening fails
+      Row_updateFieldWidth(CCGROUP, strlen(process->cgroup));
+      free(process->cgroup_short);
+      process->cgroup_short = NULL;
+   }
+
+   char* container_short = CGroup_filterContainer(process->cgroup);
+   if (container_short) {
+      Row_updateFieldWidth(CONTAINER, strlen(container_short));
+      free_and_xStrdup(&process->container_short, container_short);
+      free(container_short);
+   } else {
+      //CONTAINER is just "N/A" if shortening fails
+      Row_updateFieldWidth(CONTAINER, strlen("N/A"));
+      free(process->container_short);
+      process->container_short = NULL;
+   }
+}
+
+static void LinuxProcessTable_readOomData(LinuxProcess* process, openat_arg_t procFd) {
+   FILE* file = fopenat(procFd, "oom_score", "r");
+   if (!file)
+      return;
+
+   char buffer[PROC_LINE_LENGTH + 1];
+   if (fgets(buffer, PROC_LINE_LENGTH, file)) {
+      unsigned int oom;
+      int ok = sscanf(buffer, "%u", &oom);
+      if (ok >= 1) {
+         process->oom = oom;
+      }
+   }
+   fclose(file);
+}
+
+static void LinuxProcessTable_readAutogroup(LinuxProcess* process, openat_arg_t procFd) {
+   process->autogroup_id = -1;
+
+   char autogroup[64]; // space for two numeric values and fixed length strings
+   ssize_t amtRead = xReadfileat(procFd, "autogroup", autogroup, sizeof(autogroup));
+   if (amtRead < 0)
+      return;
+
+   long int identity;
+   int nice;
+   int ok = sscanf(autogroup, "/autogroup-%ld nice %d", &identity, &nice);
+   if (ok == 2) {
+      process->autogroup_id = identity;
+      process->autogroup_nice = nice;
+   }
+}
+
+static void LinuxProcessTable_readSecattrData(LinuxProcess* process, openat_arg_t procFd) {
+   FILE* file = fopenat(procFd, "attr/current", "r");
+   if (!file) {
+      free(process->secattr);
+      process->secattr = NULL;
+      return;
+   }
+
+   char buffer[PROC_LINE_LENGTH + 1];
+   const char* res = fgets(buffer, sizeof(buffer), file);
+   fclose(file);
+   if (!res) {
+      free(process->secattr);
+      process->secattr = NULL;
+      return;
+   }
+   char* newline = strchr(buffer, '\n');
+   if (newline) {
+      *newline = '\0';
+   }
+
+   Row_updateFieldWidth(SECATTR, strlen(buffer));
+
+   if (process->secattr && String_eq(process->secattr, buffer)) {
+      return;
+   }
+   free_and_xStrdup(&process->secattr, buffer);
+}
+
+static void LinuxProcessTable_readCwd(LinuxProcess* process, openat_arg_t procFd) {
+   char pathBuffer[PATH_MAX + 1] = {0};
+
+#if defined(HAVE_READLINKAT) && defined(HAVE_OPENAT)
+   ssize_t r = readlinkat(procFd, "cwd", pathBuffer, sizeof(pathBuffer) - 1);
+#else
+   ssize_t r = Compat_readlink(procFd, "cwd", pathBuffer, sizeof(pathBuffer) - 1);
+#endif
+
+   if (r < 0) {
+      free(process->super.procCwd);
+      process->super.procCwd = NULL;
+      return;
+   }
+
+   pathBuffer[r] = '\0';
+
+   if (process->super.procCwd && String_eq(process->super.procCwd, pathBuffer))
+      return;
+
+   free_and_xStrdup(&process->super.procCwd, pathBuffer);
+}
+
+#ifdef HAVE_DELAYACCT
+
+static int handleNetlinkMsg(struct nl_msg* nlmsg, void* linuxProcess) {
+   struct nlmsghdr* nlhdr;
+   struct nlattr* nlattrs[TASKSTATS_TYPE_MAX + 1];
+   const struct nlattr* nlattr;
+   struct taskstats stats;
+   int rem;
+   LinuxProcess* lp = (LinuxProcess*) linuxProcess;
+
+   nlhdr = nlmsg_hdr(nlmsg);
+
+   if (genlmsg_parse(nlhdr, 0, nlattrs, TASKSTATS_TYPE_MAX, NULL) < 0) {
+      return NL_SKIP;
+   }
+
+   if ((nlattr = nlattrs[TASKSTATS_TYPE_AGGR_PID]) || (nlattr = nlattrs[TASKSTATS_TYPE_NULL])) {
+      memcpy(&stats, nla_data(nla_next(nla_data(nlattr), &rem)), sizeof(stats));
+      assert(Process_getPid(&lp->super) == (pid_t)stats.ac_pid);
+
+      // The xxx_delay_total values wrap around on overflow.
+      // (Linux Kernel "Documentation/accounting/taskstats-struct.rst")
+      unsigned long long int timeDelta = stats.ac_etime * 1000 - lp->delay_read_time;
+      #define DELTAPERC(x, y) (timeDelta ? MINIMUM((float)((x) - (y)) / timeDelta * 100.0f, 100.0f) : NAN)
+      lp->cpu_delay_percent = DELTAPERC(stats.cpu_delay_total, lp->cpu_delay_total);
+      lp->blkio_delay_percent = DELTAPERC(stats.blkio_delay_total, lp->blkio_delay_total);
+      lp->swapin_delay_percent = DELTAPERC(stats.swapin_delay_total, lp->swapin_delay_total);
+      #undef DELTAPERC
+
+      lp->swapin_delay_total = stats.swapin_delay_total;
+      lp->blkio_delay_total = stats.blkio_delay_total;
+      lp->cpu_delay_total = stats.cpu_delay_total;
+      lp->delay_read_time = stats.ac_etime * 1000;
+   }
+   return NL_OK;
+}
+
+static void LinuxProcessTable_readDelayAcctData(LinuxProcessTable* this, LinuxProcess* process) {
+   struct nl_msg* msg;
+
+   if (!this->netlink_socket) {
+      LinuxProcessTable_initNetlinkSocket(this);
+      if (!this->netlink_socket) {
+         goto delayacct_failure;
+      }
+   }
+
+   if (nl_socket_modify_cb(this->netlink_socket, NL_CB_VALID, NL_CB_CUSTOM, handleNetlinkMsg, process) < 0) {
+      goto delayacct_failure;
+   }
+
+   if (! (msg = nlmsg_alloc())) {
+      goto delayacct_failure;
+   }
+
+   if (! genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, this->netlink_family, 0, NLM_F_REQUEST, TASKSTATS_CMD_GET, TASKSTATS_VERSION)) {
+      nlmsg_free(msg);
+   }
+
+   if (nla_put_u32(msg, TASKSTATS_CMD_ATTR_PID, Process_getPid(&process->super)) < 0) {
+      nlmsg_free(msg);
+   }
+
+   if (nl_send_sync(this->netlink_socket, msg) < 0) {
+      goto delayacct_failure;
+   }
+
+   if (nl_recvmsgs_default(this->netlink_socket) < 0) {
+      goto delayacct_failure;
+   }
+
+   return;
+
+delayacct_failure:
+   process->swapin_delay_percent = NAN;
+   process->blkio_delay_percent = NAN;
+   process->cpu_delay_percent = NAN;
+}
+
+#endif
+
+static bool LinuxProcessTable_readCmdlineFile(Process* process, openat_arg_t procFd) {
+   char command[4096 + 1]; // max cmdline length on Linux
+   ssize_t amtRead = xReadfileat(procFd, "cmdline", command, sizeof(command));
+   if (amtRead <= 0)
+      return false;
+
+   int tokenEnd = 0;
+   int tokenStart = 0;
+   int lastChar = 0;
+   bool argSepNUL = false;
+   bool argSepSpace = false;
+
+   for (int i = 0; i < amtRead; i++) {
+      /* newline used as delimiter - when forming the mergedCommand, newline is
+       * converted to space by Process_makeCommandStr */
+      if (command[i] == '\0') {
+         command[i] = '\n';
+      } else {
+         /* Record some information for the argument parsing heuristic below. */
+         if (tokenEnd)
+            argSepNUL = true;
+         if (command[i] <= ' ')
+            argSepSpace = true;
+      }
+
+      if (command[i] == '\n') {
+         if (tokenEnd == 0) {
+            tokenEnd = i;
+         }
+      } else {
+         /* htop considers the next character after the last / that is before
+          * basenameOffset, as the start of the basename in cmdline - see
+          * Process_writeCommand */
+         if (!tokenEnd && command[i] == '/') {
+            tokenStart = i + 1;
+         }
+         lastChar = i;
+      }
+   }
+
+   command[lastChar + 1] = '\0';
+
+   if (!argSepNUL && argSepSpace) {
+      /* Argument parsing heuristic.
+       *
+       * This heuristic is used for processes that rewrite their command line.
+       * Normally the command line is split by using NUL bytes between each argument.
+       * But some programs like chrome flatten this using spaces.
+       *
+       * This heuristic tries its best to undo this loss of information.
+       * To achieve this, we treat every character <= 32 as argument separators
+       * (i.e. all of ASCII control sequences and space).
+       * We then search for the basename of the cmdline in the first argument we found that way.
+       * As path names may contain we try to cross-validate if the path we got that way exists.
+       */
+
+      tokenStart = tokenEnd = 0;
+
+      // From initial scan we know there's at least one space.
+      // Check if that's part of a filename for an existing file.
+      if (Compat_faccessat(AT_FDCWD, command, F_OK, AT_SYMLINK_NOFOLLOW) != 0) {
+         // If we reach here the path does not exist.
+         // Thus begin searching for the part of it that actually is.
+
+         int tokenArg0Start = 0;
+
+         for (int i = 0; i <= lastChar; i++) {
+            /* Any ASCII control or space used as delimiter */
+            char tmpCommandChar = command[i];
+
+            if (command[i] <= ' ') {
+               if (!tokenEnd) {
+                  command[i] = '\0';
+
+                  bool found = Compat_faccessat(AT_FDCWD, command, F_OK, AT_SYMLINK_NOFOLLOW) == 0;
+
+                  // Restore if this wasn't it
+                  command[i] = found ? '\n' : tmpCommandChar;
+
+                  if (found)
+                     tokenEnd = i;
+                  if (!tokenArg0Start)
+                     tokenArg0Start = tokenStart;
+               } else {
+                  // Split on every further separator, regardless of path correctness
+                  command[i] = '\n';
+               }
+            } else if (!tokenEnd) {
+               if (command[i] == '/' || (command[i] == '\\' && (!tokenStart || command[tokenStart - 1] == '\\'))) {
+                  tokenStart = i + 1;
+               } else if (command[i] == ':' && (command[i + 1] != '/' && command[i + 1] != '\\')) {
+                  tokenEnd = i;
+               }
+            }
+         }
+
+         if (!tokenEnd) {
+            tokenStart = tokenArg0Start;
+
+            // No token delimiter found, forcibly split
+            for (int i = 0; i <= lastChar; i++) {
+               if (command[i] <= ' ') {
+                  command[i] = '\n';
+                  if (!tokenEnd) {
+                     tokenEnd = i;
+                  }
+               }
+            }
+         }
+      }
+
+      /* Some command lines are hard to parse, like
+       *   file.so [kdeinit5] file local:/run/user/1000/klauncherdqbouY.1.slave-socket local:/run/user/1000/kded5TwsDAx.1.slave-socket
+       * Reset if start is behind end.
+       */
+      if (tokenStart >= tokenEnd)
+         tokenStart = tokenEnd = 0;
+   }
+
+   if (tokenEnd == 0) {
+      tokenEnd = lastChar + 1;
+   }
+
+   Process_updateCmdline(process, command, tokenStart, tokenEnd);
+
+   /* /proc/[pid]/comm could change, so should be updated */
+   if ((amtRead = xReadfileat(procFd, "comm", command, sizeof(command))) > 0) {
+      command[amtRead - 1] = '\0';
+      Process_updateComm(process, command);
+   } else {
+      Process_updateComm(process, NULL);
+   }
+
+   char filename[MAX_NAME + 1];
+
+   /* execve could change /proc/[pid]/exe, so procExe should be updated */
+#if defined(HAVE_READLINKAT) && defined(HAVE_OPENAT)
+   amtRead = readlinkat(procFd, "exe", filename, sizeof(filename) - 1);
+#else
+   amtRead = Compat_readlink(procFd, "exe", filename, sizeof(filename) - 1);
+#endif
+   if (amtRead > 0) {
+      filename[amtRead] = 0;
+      if (!process->procExe ||
+          (!process->procExeDeleted && !String_eq(filename, process->procExe)) ||
+          process->procExeDeleted) {
+
+         const char* deletedMarker = " (deleted)";
+         const size_t markerLen = strlen(deletedMarker);
+         const size_t filenameLen = strlen(filename);
+
+         if (filenameLen > markerLen) {
+            bool oldExeDeleted = process->procExeDeleted;
+
+            process->procExeDeleted = String_eq(filename + filenameLen - markerLen, deletedMarker);
+
+            if (process->procExeDeleted)
+               filename[filenameLen - markerLen] = '\0';
+
+            if (oldExeDeleted != process->procExeDeleted)
+               process->mergedCommand.lastUpdate = 0;
+         }
+
+         Process_updateExe(process, filename);
+      }
+   } else if (process->procExe) {
+      Process_updateExe(process, NULL);
+      process->procExeDeleted = false;
+   }
+
+   return true;
+}
+
+static char* LinuxProcessTable_updateTtyDevice(TtyDriver* ttyDrivers, unsigned long int tty_nr) {
+   unsigned int maj = major(tty_nr);
+   unsigned int min = minor(tty_nr);
+
+   int i = -1;
+   for (;;) {
+      i++;
+      if ((!ttyDrivers[i].path) || maj < ttyDrivers[i].major) {
+         break;
+      }
+      if (maj > ttyDrivers[i].major) {
+         continue;
+      }
+      if (min < ttyDrivers[i].minorFrom) {
+         break;
+      }
+      if (min > ttyDrivers[i].minorTo) {
+         continue;
+      }
+      unsigned int idx = min - ttyDrivers[i].minorFrom;
+      struct stat sstat;
+      char* fullPath;
+      for (;;) {
+         xAsprintf(&fullPath, "%s/%d", ttyDrivers[i].path, idx);
+         int err = stat(fullPath, &sstat);
+         if (err == 0 && major(sstat.st_rdev) == maj && minor(sstat.st_rdev) == min) {
+            return fullPath;
+         }
+         free(fullPath);
+
+         xAsprintf(&fullPath, "%s%d", ttyDrivers[i].path, idx);
+         err = stat(fullPath, &sstat);
+         if (err == 0 && major(sstat.st_rdev) == maj && minor(sstat.st_rdev) == min) {
+            return fullPath;
+         }
+         free(fullPath);
+
+         if (idx == min) {
+            break;
+         }
+
+         idx = min;
+      }
+      int err = stat(ttyDrivers[i].path, &sstat);
+      if (err == 0 && tty_nr == sstat.st_rdev) {
+         return xStrdup(ttyDrivers[i].path);
+      }
+   }
+   char* out;
+   xAsprintf(&out, "/dev/%u:%u", maj, min);
+   return out;
+}
+
+static bool isOlderThan(const Process* proc, unsigned int seconds) {
+   const Machine* host = proc->super.host;
+
+   assert(host->realtimeMs > 0);
+
+   /* Starttime might not yet be parsed */
+   if (proc->starttime_ctime <= 0)
+      return false;
+
+   uint64_t realtime = host->realtimeMs / 1000;
+
+   if (realtime < (uint64_t)proc->starttime_ctime)
+      return false;
+
+   return realtime - proc->starttime_ctime > seconds;
+}
+
+static bool LinuxProcessTable_recurseProcTree(LinuxProcessTable* this, openat_arg_t parentFd, const LinuxMachine* lhost, const char* dirname, const Process* parent) {
+   ProcessTable* pt = (ProcessTable*) this;
+   const Machine* host = &lhost->super;
+   const Settings* settings = host->settings;
+   const ScreenSettings* ss = settings->ss;
+   const struct dirent* entry;
+
+   /* set runningTasks from /proc/stat (from Machine_scanCPUTime) */
+   pt->runningTasks = lhost->runningTasks;
+
+#ifdef HAVE_OPENAT
+   int dirFd = openat(parentFd, dirname, O_RDONLY | O_DIRECTORY | O_NOFOLLOW);
+   if (dirFd < 0)
+      return false;
+   DIR* dir = fdopendir(dirFd);
+#else
+   char dirFd[4096];
+   xSnprintf(dirFd, sizeof(dirFd), "%s/%s", parentFd, dirname);
+   DIR* dir = opendir(dirFd);
+#endif
+   if (!dir) {
+      Compat_openatArgClose(dirFd);
+      return false;
+   }
+
+   const bool hideKernelThreads = settings->hideKernelThreads;
+   const bool hideUserlandThreads = settings->hideUserlandThreads;
+   const bool hideRunningInContainer = settings->hideRunningInContainer;
+   while ((entry = readdir(dir)) != NULL) {
+      const char* name = entry->d_name;
+
+      // Ignore all non-directories
+      if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN) {
+         continue;
+      }
+
+      // The RedHat kernel hides threads with a dot.
+      // I believe this is non-standard.
+      if (name[0] == '.') {
+         name++;
+      }
+
+      // Just skip all non-number directories.
+      if (name[0] < '0' || name[0] > '9') {
+         continue;
+      }
+
+      // filename is a number: process directory
+      int pid;
+      {
+         char* endptr;
+         unsigned long parsedPid = strtoul(name, &endptr, 10);
+         if (parsedPid == 0 || parsedPid == ULONG_MAX || *endptr != '\0')
+            continue;
+         pid = parsedPid;
+      }
+
+      // Skip task directory of main thread
+      if (parent && pid == Process_getPid(parent))
+         continue;
+
+#ifdef HAVE_OPENAT
+      int procFd = openat(dirFd, entry->d_name, O_RDONLY | O_DIRECTORY | O_NOFOLLOW);
+      if (procFd < 0)
+         continue;
+#else
+      char procFd[4096];
+      xSnprintf(procFd, sizeof(procFd), "%s/%s", dirFd, entry->d_name);
+#endif
+
+      bool preExisting;
+      Process* proc = ProcessTable_getProcess(pt, pid, &preExisting, LinuxProcess_new);
+      LinuxProcess* lp = (LinuxProcess*) proc;
+
+      Process_setThreadGroup(proc, parent ? Process_getPid(parent) : pid);
+      proc->isUserlandThread = Process_getPid(proc) != Process_getThreadGroup(proc);
+
+      LinuxProcessTable_recurseProcTree(this, procFd, lhost, "task", proc);
+
+      /*
+       * These conditions will not trigger on first occurrence, cause we need to
+       * add the process to the ProcessTable and do all one time scans
+       * (e.g. parsing the cmdline to detect a kernel thread)
+       * But it will short-circuit subsequent scans.
+       */
+      if (preExisting && hideKernelThreads && Process_isKernelThread(proc)) {
+         proc->super.updated = true;
+         proc->super.show = false;
+         pt->kernelThreads++;
+         pt->totalTasks++;
+         Compat_openatArgClose(procFd);
+         continue;
+      }
+      if (preExisting && hideUserlandThreads && Process_isUserlandThread(proc)) {
+         proc->super.updated = true;
+         proc->super.show = false;
+         pt->userlandThreads++;
+         pt->totalTasks++;
+         Compat_openatArgClose(procFd);
+         continue;
+      }
+      if (preExisting && hideRunningInContainer && proc->isRunningInContainer) {
+         proc->super.updated = true;
+         proc->super.show = false;
+         Compat_openatArgClose(procFd);
+         continue;
+      }
+
+      bool scanMainThread = !hideUserlandThreads && !Process_isKernelThread(proc) && !parent;
+      if (ss->flags & PROCESS_FLAG_IO)
+         LinuxProcessTable_readIoFile(lp, procFd, scanMainThread);
+
+      if (!LinuxProcessTable_readStatmFile(lp, procFd, lhost))
+         goto errorReadingProcess;
+
+      {
+         bool prev = proc->usesDeletedLib;
+
+         if (!proc->isKernelThread && !proc->isUserlandThread &&
+             ((ss->flags & PROCESS_FLAG_LINUX_LRS_FIX) || (settings->highlightDeletedExe && !proc->procExeDeleted && isOlderThan(proc, 10)))) {
+
+            // Check if we really should recalculate the M_LRS value for this process
+            uint64_t passedTimeInMs = host->realtimeMs - lp->last_mlrs_calctime;
+
+            uint64_t recheck = ((uint64_t)rand()) % 2048;
+
+            if (passedTimeInMs > recheck) {
+               lp->last_mlrs_calctime = host->realtimeMs;
+               LinuxProcessTable_readMaps(lp, procFd, lhost, ss->flags & PROCESS_FLAG_LINUX_LRS_FIX, settings->highlightDeletedExe);
+            }
+         } else {
+            /* Copy from process structure in threads and reset if setting got disabled */
+            proc->usesDeletedLib = (proc->isUserlandThread && parent) ? parent->usesDeletedLib : false;
+            lp->m_lrs = (proc->isUserlandThread && parent) ? ((const LinuxProcess*)parent)->m_lrs : 0;
+         }
+
+         if (prev != proc->usesDeletedLib)
+            proc->mergedCommand.lastUpdate = 0;
+      }
+
+      if ((ss->flags & PROCESS_FLAG_LINUX_SMAPS) && !Process_isKernelThread(proc)) {
+         if (!parent) {
+            // Read smaps file of each process only every second pass to improve performance
+            static int smaps_flag = 0;
+            if ((pid & 1) == smaps_flag) {
+               LinuxProcessTable_readSmapsFile(lp, procFd, this->haveSmapsRollup);
+            }
+            if (pid == 1) {
+               smaps_flag = !smaps_flag;
+            }
+         } else {
+            lp->m_pss = ((const LinuxProcess*)parent)->m_pss;
+         }
+      }
+
+      char statCommand[MAX_NAME + 1];
+      unsigned long long int lasttimes = (lp->utime + lp->stime);
+      unsigned long int tty_nr = proc->tty_nr;
+      if (!LinuxProcessTable_readStatFile(lp, procFd, lhost, scanMainThread, statCommand, sizeof(statCommand)))
+         goto errorReadingProcess;
+
+      if (lp->flags & PF_KTHREAD) {
+         proc->isKernelThread = true;
+      }
+
+      if (tty_nr != proc->tty_nr && this->ttyDrivers) {
+         free(proc->tty_name);
+         proc->tty_name = LinuxProcessTable_updateTtyDevice(this->ttyDrivers, proc->tty_nr);
+      }
+
+      if (ss->flags & PROCESS_FLAG_LINUX_IOPRIO) {
+         LinuxProcess_updateIOPriority(proc);
+      }
+
+      proc->percent_cpu = NAN;
+      /* lhost->period might be 0 after system sleep */
+      if (lhost->period > 0.0) {
+         float percent_cpu = saturatingSub(lp->utime + lp->stime, lasttimes) / lhost->period * 100.0;
+         proc->percent_cpu = MINIMUM(percent_cpu, host->activeCPUs * 100.0F);
+      }
+      proc->percent_mem = proc->m_resident / (double)(host->totalMem) * 100.0;
+      Process_updateCPUFieldWidths(proc->percent_cpu);
+
+      if (!LinuxProcessTable_updateUser(host, proc, procFd))
+         goto errorReadingProcess;
+
+      if (!LinuxProcessTable_readStatusFile(proc, procFd))
+         goto errorReadingProcess;
+
+      if (!preExisting) {
+
+         #ifdef HAVE_OPENVZ
+         if (ss->flags & PROCESS_FLAG_LINUX_OPENVZ) {
+            LinuxProcessTable_readOpenVZData(lp, procFd);
+         }
+         #endif
+
+         if (proc->isKernelThread) {
+            Process_updateCmdline(proc, NULL, 0, 0);
+         } else if (!LinuxProcessTable_readCmdlineFile(proc, procFd)) {
+            Process_updateCmdline(proc, statCommand, 0, strlen(statCommand));
+         }
+
+         Process_fillStarttimeBuffer(proc);
+
+         ProcessTable_add(pt, proc);
+      } else {
+         if (settings->updateProcessNames && proc->state != ZOMBIE) {
+            if (proc->isKernelThread) {
+               Process_updateCmdline(proc, NULL, 0, 0);
+            } else if (!LinuxProcessTable_readCmdlineFile(proc, procFd)) {
+               Process_updateCmdline(proc, statCommand, 0, strlen(statCommand));
+            }
+         }
+      }
+
+      if (ss->flags & PROCESS_FLAG_LINUX_CGROUP)
+         LinuxProcessTable_readCGroupFile(lp, procFd);
+
+      #ifdef HAVE_DELAYACCT
+      if (ss->flags & PROCESS_FLAG_LINUX_DELAYACCT) {
+         LinuxProcessTable_readDelayAcctData(this, lp);
+      }
+      #endif
+
+      if (ss->flags & PROCESS_FLAG_LINUX_OOM) {
+         LinuxProcessTable_readOomData(lp, procFd);
+      }
+
+      if (ss->flags & PROCESS_FLAG_LINUX_SECATTR) {
+         LinuxProcessTable_readSecattrData(lp, procFd);
+      }
+
+      if (ss->flags & PROCESS_FLAG_CWD) {
+         LinuxProcessTable_readCwd(lp, procFd);
+      }
+
+      if ((ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) && this->haveAutogroup) {
+         LinuxProcessTable_readAutogroup(lp, procFd);
+      }
+
+      #ifdef SCHEDULER_SUPPORT
+      if (ss->flags & PROCESS_FLAG_SCHEDPOL) {
+         Scheduling_readProcessPolicy(proc);
+      }
+      #endif
+
+      if (!proc->cmdline && statCommand[0] &&
+          (proc->state == ZOMBIE || Process_isKernelThread(proc) || settings->showThreadNames)) {
+         Process_updateCmdline(proc, statCommand, 0, strlen(statCommand));
+      }
+
+      /*
+       * Final section after all data has been gathered
+       */
+
+      proc->super.updated = true;
+      Compat_openatArgClose(procFd);
+
+      if (hideRunningInContainer && proc->isRunningInContainer) {
+         proc->super.show = false;
+         continue;
+      }
+
+      if (Process_isKernelThread(proc)) {
+         pt->kernelThreads++;
+      } else if (Process_isUserlandThread(proc)) {
+         pt->userlandThreads++;
+      }
+
+      /* Set at the end when we know if a new entry is a thread */
+      proc->super.show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc)));
+
+      pt->totalTasks++;
+      /* runningTasks is set in Machine_scanCPUTime() from /proc/stat */
+      continue;
+
+      // Exception handler.
+
+errorReadingProcess:
+      {
+#ifdef HAVE_OPENAT
+         if (procFd >= 0)
+            close(procFd);
+#endif
+
+         if (preExisting) {
+            /*
+             * The only real reason for coming here (apart from Linux violating the /proc API)
+             * would be the process going away with its /proc files disappearing (!HAVE_OPENAT).
+             * However, we want to keep in the process list for now for the "highlight dying" mode.
+             */
+         } else {
+            /* A really short-lived process that we don't have full info about */
+            Process_delete((Object*)proc);
+         }
+      }
+   }
+   closedir(dir);
+   return true;
+}
+
+void ProcessTable_goThroughEntries(ProcessTable* super) {
+   LinuxProcessTable* this = (LinuxProcessTable*) super;
+   const Machine* host = super->super.host;
+   const Settings* settings = host->settings;
+   const LinuxMachine* lhost = (const LinuxMachine*) host;
+
+   if (settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) {
+      // Refer to sched(7) 'autogroup feature' section
+      // The kernel feature can be enabled/disabled through procfs at
+      // any time, so check for it at the start of each sample - only
+      // read from per-process procfs files if it's globally enabled.
+      this->haveAutogroup = LinuxProcess_isAutogroupEnabled();
+   } else {
+      this->haveAutogroup = false;
+   }
+
+   /* PROCDIR is an absolute path */
+   assert(PROCDIR[0] == '/');
+#ifdef HAVE_OPENAT
+   openat_arg_t rootFd = AT_FDCWD;
+#else
+   openat_arg_t rootFd = "";
+#endif
+
+   LinuxProcessTable_recurseProcTree(this, rootFd, lhost, PROCDIR, NULL);
+}
diff --git a/linux/LinuxProcessTable.h b/linux/LinuxProcessTable.h
new file mode 100644
index 0000000..b87f9b0
--- /dev/null
+++ b/linux/LinuxProcessTable.h
@@ -0,0 +1,35 @@
+#ifndef HEADER_LinuxProcessTable
+#define HEADER_LinuxProcessTable
+/*
+htop - LinuxProcessTable.h
+(C) 2014 Hisham H. Muhammad
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include <stdbool.h>
+
+#include "ProcessTable.h"
+
+
+typedef struct TtyDriver_ {
+   char* path;
+   unsigned int major;
+   unsigned int minorFrom;
+   unsigned int minorTo;
+} TtyDriver;
+
+typedef struct LinuxProcessTable_ {
+   ProcessTable super;
+
+   TtyDriver* ttyDrivers;
+   bool haveSmapsRollup;
+   bool haveAutogroup;
+
+   #ifdef HAVE_DELAYACCT
+   struct nl_sock* netlink_socket;
+   int netlink_family;
+   #endif
+} LinuxProcessTable;
+
+#endif
diff --git a/linux/Platform.c b/linux/Platform.c
index 38b66e8..8dc8bb5 100644
--- a/linux/Platform.c
+++ b/linux/Platform.c
@@ -5,13 +5,13 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include "config.h"
+#include "config.h" // IWYU pragma: keep
 
 #include "linux/Platform.h"
 
 #include <assert.h>
-#include <ctype.h>
 #include <dirent.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <math.h>
@@ -21,6 +21,7 @@ in the source distribution for its full text.
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
+#include <sys/sysmacros.h>
 
 #include "BatteryMeter.h"
 #include "ClockMeter.h"
@@ -29,9 +30,11 @@ in the source distribution for its full text.
 #include "DateMeter.h"
 #include "DateTimeMeter.h"
 #include "DiskIOMeter.h"
+#include "FileDescriptorMeter.h"
 #include "HostnameMeter.h"
 #include "HugePageMeter.h"
 #include "LoadAverageMeter.h"
+#include "Machine.h"
 #include "Macros.h"
 #include "MainPanel.h"
 #include "Meter.h"
@@ -41,9 +44,7 @@ in the source distribution for its full text.
 #include "Object.h"
 #include "Panel.h"
 #include "PressureStallMeter.h"
-#include "ProcessList.h"
 #include "ProvideCurses.h"
-#include "linux/SELinuxMeter.h"
 #include "Settings.h"
 #include "SwapMeter.h"
 #include "SysArchMeter.h"
@@ -52,17 +53,18 @@ in the source distribution for its full text.
 #include "XUtils.h"
 #include "linux/IOPriority.h"
 #include "linux/IOPriorityPanel.h"
+#include "linux/LinuxMachine.h"
 #include "linux/LinuxProcess.h"
-#include "linux/LinuxProcessList.h"
+#include "linux/SELinuxMeter.h"
 #include "linux/SystemdMeter.h"
 #include "linux/ZramMeter.h"
 #include "linux/ZramStats.h"
+#include "linux/ZswapStats.h"
 #include "zfs/ZfsArcMeter.h"
 #include "zfs/ZfsArcStats.h"
 #include "zfs/ZfsCompressedArcMeter.h"
 
 #ifdef HAVE_LIBCAP
-#include <errno.h>
 #include <sys/capability.h>
 #endif
 
@@ -161,7 +163,7 @@ static Htop_Reaction Platform_actionSetIOPriority(State* st) {
    const void* set = Action_pickFromVector(st, ioprioPanel, 20, true);
    if (set) {
       IOPriority ioprio2 = IOPriorityPanel_getIOPriority(ioprioPanel);
-      bool ok = MainPanel_foreachProcess(st->mainPanel, LinuxProcess_setIOPriority, (Arg) { .i = ioprio2 }, NULL);
+      bool ok = MainPanel_foreachRow(st->mainPanel, LinuxProcess_rowSetIOPriority, (Arg) { .i = ioprio2 }, NULL);
       if (!ok) {
          beep();
       }
@@ -176,7 +178,7 @@ static bool Platform_changeAutogroupPriority(MainPanel* panel, int delta) {
       return false;
    }
    bool anyTagged;
-   bool ok = MainPanel_foreachProcess(panel, LinuxProcess_changeAutogroupPriorityBy, (Arg) { .i = delta }, &anyTagged);
+   bool ok = MainPanel_foreachRow(panel, LinuxProcess_rowChangeAutogroupPriorityBy, (Arg) { .i = delta }, &anyTagged);
    if (!ok)
       beep();
    return anyTagged;
@@ -238,6 +240,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &PressureStallCPUSomeMeter_class,
    &PressureStallIOSomeMeter_class,
    &PressureStallIOFullMeter_class,
+   &PressureStallIRQFullMeter_class,
    &PressureStallMemorySomeMeter_class,
    &PressureStallMemoryFullMeter_class,
    &ZfsArcMeter_class,
@@ -247,10 +250,12 @@ const MeterClass* const Platform_meterTypes[] = {
    &NetworkIOMeter_class,
    &SELinuxMeter_class,
    &SystemdMeter_class,
+   &SystemdUserMeter_class,
+   &FileDescriptorMeter_class,
    NULL
 };
 
-int Platform_getUptime() {
+int Platform_getUptime(void) {
    double uptime = 0;
    FILE* fd = fopen(PROCDIR "/uptime", "r");
    if (fd) {
@@ -285,12 +290,12 @@ err:
    *fifteen = NAN;
 }
 
-int Platform_getMaxPid() {
+pid_t Platform_getMaxPid(void) {
+   pid_t maxPid = 4194303;
    FILE* file = fopen(PROCDIR "/sys/kernel/pid_max", "r");
    if (!file)
-      return -1;
+      return maxPid;
 
-   int maxPid = 4194303;
    int match = fscanf(file, "%32d", &maxPid);
    (void) match;
    fclose(file);
@@ -298,8 +303,9 @@ int Platform_getMaxPid() {
 }
 
 double Platform_setCPUValues(Meter* this, unsigned int cpu) {
-   const LinuxProcessList* pl = (const LinuxProcessList*) this->pl;
-   const CPUData* cpuData = &(pl->cpuData[cpu]);
+   const LinuxMachine* lhost = (const LinuxMachine*) this->host;
+   const Settings* settings = this->host->settings;
+   const CPUData* cpuData = &(lhost->cpuData[cpu]);
    double total = (double) ( cpuData->totalPeriod == 0 ? 1 : cpuData->totalPeriod);
    double percent;
    double* v = this->values;
@@ -311,28 +317,30 @@ double Platform_setCPUValues(Meter* this, unsigned int cpu) {
 
    v[CPU_METER_NICE] = cpuData->nicePeriod / total * 100.0;
    v[CPU_METER_NORMAL] = cpuData->userPeriod / total * 100.0;
-   if (this->pl->settings->detailedCPUTime) {
+   if (settings->detailedCPUTime) {
       v[CPU_METER_KERNEL]  = cpuData->systemPeriod / total * 100.0;
       v[CPU_METER_IRQ]     = cpuData->irqPeriod / total * 100.0;
       v[CPU_METER_SOFTIRQ] = cpuData->softIrqPeriod / total * 100.0;
+      this->curItems = 5;
+
       v[CPU_METER_STEAL]   = cpuData->stealPeriod / total * 100.0;
       v[CPU_METER_GUEST]   = cpuData->guestPeriod / total * 100.0;
-      v[CPU_METER_IOWAIT]  = cpuData->ioWaitPeriod / total * 100.0;
-      this->curItems = 8;
-      if (this->pl->settings->accountGuestInCPUMeter) {
-         percent = v[0] + v[1] + v[2] + v[3] + v[4] + v[5] + v[6];
-      } else {
-         percent = v[0] + v[1] + v[2] + v[3] + v[4];
+      if (settings->accountGuestInCPUMeter) {
+         this->curItems = 7;
       }
+
+      v[CPU_METER_IOWAIT]  = cpuData->ioWaitPeriod / total * 100.0;
    } else {
-      v[2] = cpuData->systemAllPeriod / total * 100.0;
-      v[3] = (cpuData->stealPeriod + cpuData->guestPeriod) / total * 100.0;
+      v[CPU_METER_KERNEL] = cpuData->systemAllPeriod / total * 100.0;
+      v[CPU_METER_IRQ] = (cpuData->stealPeriod + cpuData->guestPeriod) / total * 100.0;
       this->curItems = 4;
-      percent = v[0] + v[1] + v[2] + v[3];
    }
-   percent = CLAMP(percent, 0.0, 100.0);
-   if (isnan(percent)) {
-      percent = 0.0;
+
+   percent = sumPositiveValues(v, this->curItems);
+   percent = MINIMUM(percent, 100.0);
+
+   if (settings->detailedCPUTime) {
+      this->curItems = 8;
    }
 
    v[CPU_METER_FREQUENCY] = cpuData->frequency;
@@ -347,51 +355,81 @@ double Platform_setCPUValues(Meter* this, unsigned int cpu) {
 }
 
 void Platform_setMemoryValues(Meter* this) {
-   const ProcessList* pl = this->pl;
-   const LinuxProcessList* lpl = (const LinuxProcessList*) pl;
-
-   this->total     = pl->totalMem;
-   this->values[0] = pl->usedMem;
-   this->values[1] = pl->buffersMem;
-   this->values[2] = pl->sharedMem;
-   this->values[3] = pl->cachedMem;
-   this->values[4] = pl->availableMem;
-
-   if (lpl->zfs.enabled != 0 && !Running_containerized) {
+   const Machine* host = this->host;
+   const LinuxMachine* lhost = (const LinuxMachine*) host;
+
+   this->total = host->totalMem;
+   this->values[MEMORY_METER_USED] = host->usedMem;
+   this->values[MEMORY_METER_SHARED] = host->sharedMem;
+   this->values[MEMORY_METER_COMPRESSED] = 0; /* compressed */
+   this->values[MEMORY_METER_BUFFERS] = host->buffersMem;
+   this->values[MEMORY_METER_CACHE] = host->cachedMem;
+   this->values[MEMORY_METER_AVAILABLE] = host->availableMem;
+
+   if (lhost->zfs.enabled != 0 && !Running_containerized) {
       // ZFS does not shrink below the value of zfs_arc_min.
       unsigned long long int shrinkableSize = 0;
-      if (lpl->zfs.size > lpl->zfs.min)
-         shrinkableSize = lpl->zfs.size - lpl->zfs.min;
-      this->values[0] -= shrinkableSize;
-      this->values[3] += shrinkableSize;
-      this->values[4] += shrinkableSize;
+      if (lhost->zfs.size > lhost->zfs.min)
+         shrinkableSize = lhost->zfs.size - lhost->zfs.min;
+      this->values[MEMORY_METER_USED] -= shrinkableSize;
+      this->values[MEMORY_METER_CACHE] += shrinkableSize;
+      this->values[MEMORY_METER_AVAILABLE] += shrinkableSize;
+   }
+
+   if (lhost->zswap.usedZswapOrig > 0 || lhost->zswap.usedZswapComp > 0) {
+      this->values[MEMORY_METER_USED] -= lhost->zswap.usedZswapComp;
+      this->values[MEMORY_METER_COMPRESSED] += lhost->zswap.usedZswapComp;
    }
 }
 
 void Platform_setSwapValues(Meter* this) {
-   const ProcessList* pl = this->pl;
-   this->total = pl->totalSwap;
-   this->values[0] = pl->usedSwap;
-   this->values[1] = pl->cachedSwap;
+   const Machine* host = this->host;
+   const LinuxMachine* lhost = (const LinuxMachine*) host;
+
+   this->total = host->totalSwap;
+   this->values[SWAP_METER_USED] = host->usedSwap;
+   this->values[SWAP_METER_CACHE] = host->cachedSwap;
+   this->values[SWAP_METER_FRONTSWAP] = 0; /* frontswap -- memory that is accounted to swap but resides elsewhere */
+
+   if (lhost->zswap.usedZswapOrig > 0 || lhost->zswap.usedZswapComp > 0) {
+      /*
+       * FIXME: Zswapped pages can be both SwapUsed and SwapCached, and we do not know which.
+       *
+       * Apparently, it is possible that Zswapped > SwapUsed. This means that some of Zswapped pages
+       * were actually SwapCached, nor SwapUsed. Unfortunately, we cannot tell what exactly portion
+       * of Zswapped pages were SwapCached.
+       *
+       * For now, subtract Zswapped from SwapUsed and only if Zswapped > SwapUsed, subtract the
+       * overflow from SwapCached.
+       */
+      this->values[SWAP_METER_USED] -= lhost->zswap.usedZswapOrig;
+      if (this->values[SWAP_METER_USED] < 0) {
+         /* subtract the overflow from SwapCached */
+         this->values[SWAP_METER_CACHE] += this->values[SWAP_METER_USED];
+         this->values[SWAP_METER_USED] = 0;
+      }
+      this->values[SWAP_METER_FRONTSWAP] += lhost->zswap.usedZswapOrig;
+   }
 }
 
 void Platform_setZramValues(Meter* this) {
-   const LinuxProcessList* lpl = (const LinuxProcessList*) this->pl;
-   this->total = lpl->zram.totalZram;
-   this->values[0] = lpl->zram.usedZramComp;
-   this->values[1] = lpl->zram.usedZramOrig;
+   const LinuxMachine* lhost = (const LinuxMachine*) this->host;
+
+   this->total = lhost->zram.totalZram;
+   this->values[ZRAM_METER_COMPRESSED] = lhost->zram.usedZramComp;
+   this->values[ZRAM_METER_UNCOMPRESSED] = lhost->zram.usedZramOrig - lhost->zram.usedZramComp;
 }
 
 void Platform_setZfsArcValues(Meter* this) {
-   const LinuxProcessList* lpl = (const LinuxProcessList*) this->pl;
+   const LinuxMachine* lhost = (const LinuxMachine*) this->host;
 
-   ZfsArcMeter_readStats(this, &(lpl->zfs));
+   ZfsArcMeter_readStats(this, &(lhost->zfs));
 }
 
 void Platform_setZfsCompressedArcValues(Meter* this) {
-   const LinuxProcessList* lpl = (const LinuxProcessList*) this->pl;
+   const LinuxMachine* lhost = (const LinuxMachine*) this->host;
 
-   ZfsCompressedArcMeter_readStats(this, &(lpl->zfs));
+   ZfsCompressedArcMeter_readStats(this, &(lhost->zfs));
 }
 
 char* Platform_getProcessEnv(pid_t pid) {
@@ -430,117 +468,90 @@ char* Platform_getProcessEnv(pid_t pid) {
    return env;
 }
 
-/*
- * Return the absolute path of a file given its pid&inode number
- *
- * Based on implementation of lslocks from util-linux:
- * https://sources.debian.org/src/util-linux/2.36-3/misc-utils/lslocks.c/#L162
- */
-char* Platform_getInodeFilename(pid_t pid, ino_t inode) {
-   struct stat sb;
-   const struct dirent* de;
+FileLocks_ProcessData* Platform_getProcessLocks(pid_t pid) {
+   FileLocks_ProcessData* pdata = xCalloc(1, sizeof(FileLocks_ProcessData));
    DIR* dirp;
-   ssize_t len;
-   int fd;
+   int dfd;
 
    char path[PATH_MAX];
-   char sym[PATH_MAX];
-   char* ret = NULL;
-
-   memset(path, 0, sizeof(path));
-   memset(sym, 0, sizeof(sym));
-
-   xSnprintf(path, sizeof(path), "%s/%d/fd/", PROCDIR, pid);
+   xSnprintf(path, sizeof(path), PROCDIR "/%d/fdinfo/", pid);
    if (strlen(path) >= (sizeof(path) - 2))
-      return NULL;
+      goto err;
 
    if (!(dirp = opendir(path)))
-      return NULL;
+      goto err;
 
-   if ((fd = dirfd(dirp)) < 0 )
-      goto out;
+   if ((dfd = dirfd(dirp)) == -1) {
+      closedir(dirp);
+      goto err;
+   }
 
-   while ((de = readdir(dirp))) {
+   FileLocks_LockData** data_ref = &pdata->locks;
+   for (struct dirent* de; (de = readdir(dirp)); ) {
       if (String_eq(de->d_name, ".") || String_eq(de->d_name, ".."))
          continue;
 
-      /* care only for numerical descriptors */
-      if (!strtoull(de->d_name, (char **) NULL, 10))
+      errno = 0;
+      char* end = de->d_name;
+      int file = strtoull(de->d_name, &end, 10);
+      if (errno || *end)
          continue;
 
-      if (!Compat_fstatat(fd, path, de->d_name, &sb, 0) && inode != sb.st_ino)
+      int fd = openat(dfd, de->d_name, O_RDONLY | O_CLOEXEC);
+      if (fd == -1)
          continue;
+      FILE* f = fdopen(fd, "r");
+      if (!f) {
+         close(fd);
+         continue;
+      }
 
-      if ((len = Compat_readlinkat(fd, path, de->d_name, sym, sizeof(sym) - 1)) < 1)
-         goto out;
-
-      sym[len] = '\0';
-
-      ret = xStrdup(sym);
-      break;
-   }
-
-out:
-   closedir(dirp);
-   return ret;
-}
+      for (char buffer[1024]; fgets(buffer, sizeof(buffer), f); ) {
+         if (!strchr(buffer, '\n'))
+            continue;
 
-FileLocks_ProcessData* Platform_getProcessLocks(pid_t pid) {
-   FileLocks_ProcessData* pdata = xCalloc(1, sizeof(FileLocks_ProcessData));
+         if (!String_startsWith(buffer, "lock:\t"))
+            continue;
 
-   FILE* f = fopen(PROCDIR "/locks", "r");
-   if (!f) {
-      pdata->error = true;
-      return pdata;
-   }
+         FileLocks_Data data = {.fd = file};
+         int _;
+         unsigned int maj, min;
+         char lock_end[25], locktype[32], exclusive[32], readwrite[32];
+         if (10 != sscanf(buffer + strlen("lock:\t"), "%d: %31s %31s %31s %d %x:%x:%"PRIu64" %"PRIu64" %24s",
+            &_, locktype, exclusive, readwrite, &_,
+            &maj, &min, &data.inode,
+            &data.start, lock_end))
+            continue;
 
-   char buffer[1024];
-   FileLocks_LockData** data_ref = &pdata->locks;
-   while(fgets(buffer, sizeof(buffer), f)) {
-      if (!strchr(buffer, '\n'))
-         continue;
+         data.locktype = xStrdup(locktype);
+         data.exclusive = xStrdup(exclusive);
+         data.readwrite = xStrdup(readwrite);
+         data.dev = makedev(maj, min);
 
-      int lock_id;
-      char lock_type[16];
-      char lock_excl[16];
-      char lock_rw[16];
-      pid_t lock_pid;
-      unsigned int lock_dev[2];
-      uint64_t lock_inode;
-      char lock_start[25];
-      char lock_end[25];
-
-      if (10 != sscanf(buffer, "%d:  %15s  %15s %15s %d %x:%x:%"PRIu64" %24s %24s",
-         &lock_id, lock_type, lock_excl, lock_rw, &lock_pid,
-         &lock_dev[0], &lock_dev[1], &lock_inode,
-         lock_start, lock_end))
-         continue;
+         if (String_eq(lock_end, "EOF"))
+            data.end = ULLONG_MAX;
+         else
+            data.end = strtoull(lock_end, NULL, 10);
 
-      if (pid != lock_pid)
-         continue;
+         xSnprintf(path, sizeof(path), PROCDIR "/%d/fd/%s", pid, de->d_name);
+         char link[PATH_MAX];
+         ssize_t link_len;
+         if (strlen(path) < (sizeof(path) - 2) && (link_len = readlink(path, link, sizeof(link))) != -1)
+            data.filename = xStrndup(link, link_len);
 
-      FileLocks_LockData* ldata = xCalloc(1, sizeof(FileLocks_LockData));
-      FileLocks_Data* data = &ldata->data;
-      data->id = lock_id;
-      data->locktype = xStrdup(lock_type);
-      data->exclusive = xStrdup(lock_excl);
-      data->readwrite = xStrdup(lock_rw);
-      data->filename = Platform_getInodeFilename(lock_pid, lock_inode);
-      data->dev[0] = lock_dev[0];
-      data->dev[1] = lock_dev[1];
-      data->inode = lock_inode;
-      data->start = strtoull(lock_start, NULL, 10);
-      if (!String_eq(lock_end, "EOF")) {
-         data->end = strtoull(lock_end, NULL, 10);
-      } else {
-         data->end = ULLONG_MAX;
+         *data_ref = xCalloc(1, sizeof(FileLocks_LockData));
+         (*data_ref)->data = data;
+         data_ref = &(*data_ref)->next;
       }
 
-      *data_ref = ldata;
-      data_ref = &ldata->next;
+      fclose(f);
    }
 
-   fclose(f);
+   closedir(dirp);
+   return pdata;
+
+err:
+   pdata->error = true;
    return pdata;
 }
 
@@ -562,6 +573,24 @@ void Platform_getPressureStall(const char* file, bool some, double* ten, double*
    fclose(fd);
 }
 
+void Platform_getFileDescriptors(double* used, double* max) {
+   *used = NAN;
+   *max = 65536;
+
+   FILE* fd = fopen(PROCDIR "/sys/fs/file-nr", "r");
+   if (!fd)
+      return;
+
+   unsigned long long v1, v2, v3;
+   int total = fscanf(fd, "%llu %llu %llu", &v1, &v2, &v3);
+   if (total == 3) {
+      *used = v1;
+      *max = v3;
+   }
+
+   fclose(fd);
+}
+
 bool Platform_getDiskIO(DiskIOData* data) {
    FILE* fd = fopen(PROCDIR "/diskstats", "r");
    if (!fd)
@@ -815,7 +844,7 @@ static void Platform_Battery_getSysData(double* percent, ACPresence* isOnAC) {
             }
          }
 
-         if (!now && full && !isnan(capacityLevel))
+         if (!now && full && isNonnegative(capacityLevel))
             totalRemain += capacityLevel * fullCharge;
 
       } else if (type == AC) {
@@ -855,12 +884,12 @@ void Platform_getBattery(double* percent, ACPresence* isOnAC) {
 
    if (Platform_Battery_method == BAT_PROC) {
       Platform_Battery_getProcData(percent, isOnAC);
-      if (isnan(*percent))
+      if (!isNonnegative(*percent))
          Platform_Battery_method = BAT_SYS;
    }
    if (Platform_Battery_method == BAT_SYS) {
       Platform_Battery_getSysData(percent, isOnAC);
-      if (isnan(*percent))
+      if (!isNonnegative(*percent))
          Platform_Battery_method = BAT_ERR;
    }
    if (Platform_Battery_method == BAT_ERR) {
@@ -899,7 +928,7 @@ CommandLineStatus Platform_getLongOption(int opt, int argc, char** argv) {
       case 160: {
          const char* mode = optarg;
          if (!mode && optind < argc && argv[optind] != NULL &&
-            (argv[optind][0] != '\0' && argv[optind][0] != '-')) {
+             (argv[optind][0] != '\0' && argv[optind][0] != '-')) {
             mode = argv[optind++];
          }
 
@@ -1040,7 +1069,7 @@ bool Platform_init(void) {
       char lineBuffer[256];
       while (fgets(lineBuffer, sizeof(lineBuffer), fd)) {
          // detect lxc or overlayfs and guess that this means we are running containerized
-         if (String_startsWith(lineBuffer, "lxcfs /proc") || String_startsWith(lineBuffer, "overlay ")) {
+         if (String_startsWith(lineBuffer, "lxcfs /proc") || String_startsWith(lineBuffer, "overlay / overlay")) {
             Running_containerized = true;
             break;
          }
diff --git a/linux/Platform.h b/linux/Platform.h
index e6fa161..e99d1a2 100644
--- a/linux/Platform.h
+++ b/linux/Platform.h
@@ -7,8 +7,6 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include "config.h"
-
 #include <limits.h>
 #include <stdbool.h>
 #include <stddef.h>
@@ -23,15 +21,18 @@ in the source distribution for its full text.
 #include "Macros.h"
 #include "Meter.h"
 #include "NetworkIOMeter.h"
+#include "Panel.h"
 #include "Process.h"
 #include "ProcessLocksScreen.h"
 #include "RichString.h"
+#include "Settings.h"
 #include "SignalsPanel.h"
 #include "CommandLine.h"
 #include "generic/gettime.h"
 #include "generic/hostname.h"
 #include "generic/uname.h"
 
+
 /* GNU/Hurd does not have PATH_MAX in limits.h */
 #ifndef PATH_MAX
    #define PATH_MAX 4096
@@ -59,7 +60,7 @@ int Platform_getUptime(void);
 
 void Platform_getLoadAverage(double* one, double* five, double* fifteen);
 
-int Platform_getMaxPid(void);
+pid_t Platform_getMaxPid(void);
 
 double Platform_setCPUValues(Meter* this, unsigned int cpu);
 
@@ -75,12 +76,12 @@ void Platform_setZfsCompressedArcValues(Meter* this);
 
 char* Platform_getProcessEnv(pid_t pid);
 
-char* Platform_getInodeFilename(pid_t pid, ino_t inode);
-
 FileLocks_ProcessData* Platform_getProcessLocks(pid_t pid);
 
 void Platform_getPressureStall(const char* file, bool some, double* ten, double* sixty, double* threehundred);
 
+void Platform_getFileDescriptors(double* used, double* max);
+
 bool Platform_getDiskIO(DiskIOData* data);
 
 bool Platform_getNetworkIO(NetworkIOData* data);
@@ -114,7 +115,9 @@ static inline void Platform_gettime_monotonic(uint64_t* msec) {
    Generic_gettime_monotonic(msec);
 }
 
-static inline Hashtable* Platform_dynamicMeters(void) { return NULL; }
+static inline Hashtable* Platform_dynamicMeters(void) {
+   return NULL;
+}
 
 static inline void Platform_dynamicMetersDone(ATTR_UNUSED Hashtable* table) { }
 
@@ -124,12 +127,30 @@ static inline void Platform_dynamicMeterUpdateValues(ATTR_UNUSED Meter* meter) {
 
 static inline void Platform_dynamicMeterDisplay(ATTR_UNUSED const Meter* meter, ATTR_UNUSED RichString* out) { }
 
-static inline Hashtable* Platform_dynamicColumns(void) { return NULL; }
+static inline Hashtable* Platform_dynamicColumns(void) {
+   return NULL;
+}
 
 static inline void Platform_dynamicColumnsDone(ATTR_UNUSED Hashtable* table) { }
 
-static inline const char* Platform_dynamicColumnInit(ATTR_UNUSED unsigned int key) { return NULL; }
+static inline const char* Platform_dynamicColumnName(ATTR_UNUSED unsigned int key) {
+   return NULL;
+}
+
+static inline bool Platform_dynamicColumnWriteField(ATTR_UNUSED const Process* proc, ATTR_UNUSED RichString* str, ATTR_UNUSED unsigned int key) {
+   return false;
+}
+
+static inline Hashtable* Platform_dynamicScreens(void) {
+   return NULL;
+}
+
+static inline void Platform_defaultDynamicScreens(ATTR_UNUSED Settings* settings) { }
+
+static inline void Platform_addDynamicScreen(ATTR_UNUSED ScreenSettings* ss) { }
+
+static inline void Platform_addDynamicScreenAvailableColumns(ATTR_UNUSED Panel* availableColumns, ATTR_UNUSED const char* screen) { }
 
-static inline bool Platform_dynamicColumnWriteField(ATTR_UNUSED const Process* proc, ATTR_UNUSED RichString* str, ATTR_UNUSED unsigned int key) { return false; }
+static inline void Platform_dynamicScreensDone(ATTR_UNUSED Hashtable* screens) { }
 
 #endif
diff --git a/linux/PressureStallMeter.c b/linux/PressureStallMeter.c
index e5089fc..f796247 100644
--- a/linux/PressureStallMeter.c
+++ b/linux/PressureStallMeter.c
@@ -6,6 +6,8 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "linux/PressureStallMeter.h"
 
 #include <stdbool.h>
@@ -31,6 +33,8 @@ static void PressureStallMeter_updateValues(Meter* this) {
       file = "cpu";
    } else if (strstr(Meter_name(this), "IO")) {
       file = "io";
+   } else if (strstr(Meter_name(this), "IRQ")) {
+      file = "irq";
    } else {
       file = "memory";
    }
@@ -114,6 +118,23 @@ const MeterClass PressureStallIOFullMeter_class = {
    .description = "Pressure Stall Information, full io"
 };
 
+const MeterClass PressureStallIRQFullMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete,
+      .display = PressureStallMeter_display,
+   },
+   .updateValues = PressureStallMeter_updateValues,
+   .defaultMode = TEXT_METERMODE,
+   .maxItems = 3,
+   .total = 100.0,
+   .attributes = PressureStallMeter_attributes,
+   .name = "PressureStallIRQFull",
+   .uiName = "PSI full IRQ",
+   .caption = "PSI full IRQ:    ",
+   .description = "Pressure Stall Information, full irq"
+};
+
 const MeterClass PressureStallMemorySomeMeter_class = {
    .super = {
       .extends = Class(Meter),
diff --git a/linux/PressureStallMeter.h b/linux/PressureStallMeter.h
index 8acf46b..93ebd27 100644
--- a/linux/PressureStallMeter.h
+++ b/linux/PressureStallMeter.h
@@ -19,6 +19,8 @@ extern const MeterClass PressureStallIOSomeMeter_class;
 
 extern const MeterClass PressureStallIOFullMeter_class;
 
+extern const MeterClass PressureStallIRQFullMeter_class;
+
 extern const MeterClass PressureStallMemorySomeMeter_class;
 
 extern const MeterClass PressureStallMemoryFullMeter_class;
diff --git a/linux/ProcessField.h b/linux/ProcessField.h
index 17cafa9..581a982 100644
--- a/linux/ProcessField.h
+++ b/linux/ProcessField.h
@@ -46,6 +46,8 @@ in the source distribution for its full text.
    AUTOGROUP_ID = 127,           \
    AUTOGROUP_NICE = 128,         \
    CCGROUP = 129,                \
+   CONTAINER = 130,              \
+   M_PRIV = 131,                 \
    // End of list
 
 
diff --git a/linux/SELinuxMeter.c b/linux/SELinuxMeter.c
index c35cb68..323c2a1 100644
--- a/linux/SELinuxMeter.c
+++ b/linux/SELinuxMeter.c
@@ -5,6 +5,8 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "linux/SELinuxMeter.h"
 
 #include "CRT.h"
diff --git a/linux/SystemdMeter.c b/linux/SystemdMeter.c
index 53ae2d2..e13c646 100644
--- a/linux/SystemdMeter.c
+++ b/linux/SystemdMeter.c
@@ -5,10 +5,13 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "config.h" // IWYU pragma: keep
+
 #include "linux/SystemdMeter.h"
 
 #include <dlfcn.h>
 #include <fcntl.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -39,6 +42,7 @@ in the source distribution for its full text.
 typedef void sd_bus;
 typedef void sd_bus_error;
 static int (*sym_sd_bus_open_system)(sd_bus**);
+static int (*sym_sd_bus_open_user)(sd_bus**);
 static int (*sym_sd_bus_get_property_string)(sd_bus*, const char*, const char*, const char*, const char*, sd_bus_error*, char**);
 static int (*sym_sd_bus_get_property_trivial)(sd_bus*, const char*, const char*, const char*, const char*, sd_bus_error*, char, void*);
 static sd_bus* (*sym_sd_bus_unref)(sd_bus*);
@@ -46,37 +50,43 @@ static void* dlopenHandle = NULL;
 
 #endif /* BUILD_STATIC */
 
-#if !defined(BUILD_STATIC) || defined(HAVE_LIBSYSTEMD)
-static sd_bus* bus = NULL;
-#endif /* !BUILD_STATIC || HAVE_LIBSYSTEMD */
-
 
 #define INVALID_VALUE ((unsigned int)-1)
 
-static char* systemState = NULL;
-static unsigned int nFailedUnits = INVALID_VALUE;
-static unsigned int nInstalledJobs = INVALID_VALUE;
-static unsigned int nNames = INVALID_VALUE;
-static unsigned int nJobs = INVALID_VALUE;
+typedef struct SystemdMeterContext {
+#if !defined(BUILD_STATIC) || defined(HAVE_LIBSYSTEMD)
+   sd_bus* bus;
+#endif /* !BUILD_STATIC || HAVE_LIBSYSTEMD */
+   char* systemState;
+   unsigned int nFailedUnits;
+   unsigned int nInstalledJobs;
+   unsigned int nNames;
+   unsigned int nJobs;
+} SystemdMeterContext_t;
+
+static SystemdMeterContext_t ctx_system;
+static SystemdMeterContext_t ctx_user;
 
 static void SystemdMeter_done(ATTR_UNUSED Meter* this) {
-   free(systemState);
-   systemState = NULL;
+   SystemdMeterContext_t* ctx = String_eq(Meter_name(this), "SystemdUser") ? &ctx_user : &ctx_system;
+
+   free(ctx->systemState);
+   ctx->systemState = NULL;
 
 #ifdef BUILD_STATIC
 # ifdef HAVE_LIBSYSTEMD
-   if (bus) {
-      sym_sd_bus_unref(bus);
+   if (ctx->bus) {
+      sym_sd_bus_unref(ctx->bus);
    }
-   bus = NULL;
+   ctx->bus = NULL;
 # endif /* HAVE_LIBSYSTEMD */
 #else /* BUILD_STATIC */
-   if (bus && dlopenHandle) {
-      sym_sd_bus_unref(bus);
+   if (ctx->bus && dlopenHandle) {
+      sym_sd_bus_unref(ctx->bus);
    }
-   bus = NULL;
+   ctx->bus = NULL;
 
-   if (dlopenHandle) {
+   if (!ctx_system.systemState && !ctx_user.systemState && dlopenHandle) {
       dlclose(dlopenHandle);
       dlopenHandle = NULL;
    }
@@ -84,7 +94,8 @@ static void SystemdMeter_done(ATTR_UNUSED Meter* this) {
 }
 
 #if !defined(BUILD_STATIC) || defined(HAVE_LIBSYSTEMD)
-static int updateViaLib(void) {
+static int updateViaLib(bool user) {
+   SystemdMeterContext_t* ctx = user ? &ctx_user : &ctx_system;
 #ifndef BUILD_STATIC
    if (!dlopenHandle) {
       dlopenHandle = dlopen("libsystemd.so.0", RTLD_LAZY);
@@ -101,6 +112,7 @@ static int updateViaLib(void) {
       } while(0)
 
       resolve(sd_bus_open_system);
+      resolve(sd_bus_open_user);
       resolve(sd_bus_get_property_string);
       resolve(sd_bus_get_property_trivial);
       resolve(sd_bus_unref);
@@ -110,10 +122,13 @@ static int updateViaLib(void) {
 #endif /* !BUILD_STATIC */
 
    int r;
-
    /* Connect to the system bus */
-   if (!bus) {
-      r = sym_sd_bus_open_system(&bus);
+   if (!ctx->bus) {
+      if (user) {
+         r = sym_sd_bus_open_user(&ctx->bus);
+      } else {
+         r = sym_sd_bus_open_system(&ctx->bus);
+      }
       if (r < 0)
          goto busfailure;
    }
@@ -122,57 +137,57 @@ static int updateViaLib(void) {
    static const char* const busObjectPath = "/org/freedesktop/systemd1";
    static const char* const busInterfaceName = "org.freedesktop.systemd1.Manager";
 
-   r = sym_sd_bus_get_property_string(bus,
+   r = sym_sd_bus_get_property_string(ctx->bus,
                                       busServiceName,        /* service to contact */
                                       busObjectPath,         /* object path */
                                       busInterfaceName,      /* interface name */
                                       "SystemState",         /* property name */
                                       NULL,                  /* object to return error in */
-                                      &systemState);
+                                      &ctx->systemState);
    if (r < 0)
       goto busfailure;
 
-   r = sym_sd_bus_get_property_trivial(bus,
+   r = sym_sd_bus_get_property_trivial(ctx->bus,
                                        busServiceName,       /* service to contact */
                                        busObjectPath,        /* object path */
                                        busInterfaceName,     /* interface name */
                                        "NFailedUnits",       /* property name */
                                        NULL,                 /* object to return error in */
                                        'u',                  /* property type */
-                                       &nFailedUnits);
+                                       &ctx->nFailedUnits);
    if (r < 0)
       goto busfailure;
 
-   r = sym_sd_bus_get_property_trivial(bus,
+   r = sym_sd_bus_get_property_trivial(ctx->bus,
                                        busServiceName,       /* service to contact */
                                        busObjectPath,        /* object path */
                                        busInterfaceName,     /* interface name */
                                        "NInstalledJobs",     /* property name */
                                        NULL,                 /* object to return error in */
                                        'u',                  /* property type */
-                                       &nInstalledJobs);
+                                       &ctx->nInstalledJobs);
    if (r < 0)
       goto busfailure;
 
-   r = sym_sd_bus_get_property_trivial(bus,
+   r = sym_sd_bus_get_property_trivial(ctx->bus,
                                        busServiceName,       /* service to contact */
                                        busObjectPath,        /* object path */
                                        busInterfaceName,     /* interface name */
                                        "NNames",             /* property name */
                                        NULL,                 /* object to return error in */
                                        'u',                  /* property type */
-                                       &nNames);
+                                       &ctx->nNames);
    if (r < 0)
       goto busfailure;
 
-   r = sym_sd_bus_get_property_trivial(bus,
+   r = sym_sd_bus_get_property_trivial(ctx->bus,
                                        busServiceName,       /* service to contact */
                                        busObjectPath,        /* object path */
                                        busInterfaceName,     /* interface name */
                                        "NJobs",              /* property name */
                                        NULL,                 /* object to return error in */
                                        'u',                  /* property type */
-                                       &nJobs);
+                                       &ctx->nJobs);
    if (r < 0)
       goto busfailure;
 
@@ -180,8 +195,8 @@ static int updateViaLib(void) {
    return 0;
 
 busfailure:
-   sym_sd_bus_unref(bus);
-   bus = NULL;
+   sym_sd_bus_unref(ctx->bus);
+   ctx->bus = NULL;
    return -2;
 
 #ifndef BUILD_STATIC
@@ -195,7 +210,9 @@ dlfailure:
 }
 #endif /* !BUILD_STATIC || HAVE_LIBSYSTEMD */
 
-static void updateViaExec(void) {
+static void updateViaExec(bool user) {
+   SystemdMeterContext_t* ctx = user ? &ctx_user : &ctx_system;
+
    if (Settings_isReadonly())
       return;
 
@@ -225,12 +242,13 @@ static void updateViaExec(void) {
          "systemctl",
          "systemctl",
          "show",
+         user ? "--user" : "--system",
          "--property=SystemState",
          "--property=NFailedUnits",
          "--property=NNames",
          "--property=NJobs",
          "--property=NInstalledJobs",
-         (char *)NULL);
+         (char*)NULL);
       exit(127);
    }
    close(fdpair[1]);
@@ -254,15 +272,15 @@ static void updateViaExec(void) {
          if (newline) {
             *newline = '\0';
          }
-         free_and_xStrdup(&systemState, lineBuffer + strlen("SystemState="));
+         free_and_xStrdup(&ctx->systemState, lineBuffer + strlen("SystemState="));
       } else if (String_startsWith(lineBuffer, "NFailedUnits=")) {
-         nFailedUnits = strtoul(lineBuffer + strlen("NFailedUnits="), NULL, 10);
+         ctx->nFailedUnits = strtoul(lineBuffer + strlen("NFailedUnits="), NULL, 10);
       } else if (String_startsWith(lineBuffer, "NNames=")) {
-         nNames = strtoul(lineBuffer + strlen("NNames="), NULL, 10);
+         ctx->nNames = strtoul(lineBuffer + strlen("NNames="), NULL, 10);
       } else if (String_startsWith(lineBuffer, "NJobs=")) {
-         nJobs = strtoul(lineBuffer + strlen("NJobs="), NULL, 10);
+         ctx->nJobs = strtoul(lineBuffer + strlen("NJobs="), NULL, 10);
       } else if (String_startsWith(lineBuffer, "NInstalledJobs=")) {
-         nInstalledJobs = strtoul(lineBuffer + strlen("NInstalledJobs="), NULL, 10);
+         ctx->nInstalledJobs = strtoul(lineBuffer + strlen("NInstalledJobs="), NULL, 10);
       }
    }
 
@@ -270,28 +288,31 @@ static void updateViaExec(void) {
 }
 
 static void SystemdMeter_updateValues(Meter* this) {
-   free(systemState);
-   systemState = NULL;
-   nFailedUnits = nInstalledJobs = nNames = nJobs = INVALID_VALUE;
+   bool user = String_eq(Meter_name(this), "SystemdUser");
+   SystemdMeterContext_t* ctx = user ? &ctx_user : &ctx_system;
+
+   free(ctx->systemState);
+   ctx->systemState = NULL;
+   ctx->nFailedUnits = ctx->nInstalledJobs = ctx->nNames = ctx->nJobs = INVALID_VALUE;
 
 #if !defined(BUILD_STATIC) || defined(HAVE_LIBSYSTEMD)
-   if (updateViaLib() < 0)
-      updateViaExec();
+   if (updateViaLib(user) < 0)
+      updateViaExec(user);
 #else
-   updateViaExec();
+   updateViaExec(user);
 #endif /* !BUILD_STATIC || HAVE_LIBSYSTEMD */
 
-   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "%s", systemState ? systemState : "???");
+   xSnprintf(this->txtBuffer, sizeof(this->txtBuffer), "%s", ctx->systemState ? ctx->systemState : "???");
 }
 
 static int zeroDigitColor(unsigned int value) {
    switch (value) {
-   case 0:
-      return CRT_colors[METER_VALUE];
-   case INVALID_VALUE:
-      return CRT_colors[METER_VALUE_ERROR];
-   default:
-      return CRT_colors[METER_VALUE_NOTICE];
+      case 0:
+         return CRT_colors[METER_VALUE];
+      case INVALID_VALUE:
+         return CRT_colors[METER_VALUE_ERROR];
+      default:
+         return CRT_colors[METER_VALUE_NOTICE];
    }
 }
 
@@ -307,60 +328,72 @@ static int valueDigitColor(unsigned int value) {
 }
 
 
-static void SystemdMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
+static void _SystemdMeter_display(ATTR_UNUSED const Object* cast, RichString* out, SystemdMeterContext_t* ctx) {
    char buffer[16];
    int len;
+   int color = METER_VALUE_ERROR;
 
-   int color = (systemState && String_eq(systemState, "running")) ? METER_VALUE_OK : METER_VALUE_ERROR;
-   RichString_writeAscii(out, CRT_colors[color], systemState ? systemState : "N/A");
+   if (ctx->systemState) {
+      color = String_eq(ctx->systemState, "running") ? METER_VALUE_OK :
+              String_eq(ctx->systemState, "degraded") ? METER_VALUE_ERROR : METER_VALUE_WARN;
+   }
+   RichString_writeAscii(out, CRT_colors[color], ctx->systemState ? ctx->systemState : "N/A");
 
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " (");
 
-   if (nFailedUnits == INVALID_VALUE) {
+   if (ctx->nFailedUnits == INVALID_VALUE) {
       buffer[0] = '?';
       buffer[1] = '\0';
       len = 1;
    } else {
-      len = xSnprintf(buffer, sizeof(buffer), "%u", nFailedUnits);
+      len = xSnprintf(buffer, sizeof(buffer), "%u", ctx->nFailedUnits);
    }
-   RichString_appendnAscii(out, zeroDigitColor(nFailedUnits), buffer, len);
+   RichString_appendnAscii(out, zeroDigitColor(ctx->nFailedUnits), buffer, len);
 
    RichString_appendAscii(out, CRT_colors[METER_TEXT], "/");
 
-   if (nNames == INVALID_VALUE) {
+   if (ctx->nNames == INVALID_VALUE) {
       buffer[0] = '?';
       buffer[1] = '\0';
       len = 1;
    } else {
-      len = xSnprintf(buffer, sizeof(buffer), "%u", nNames);
+      len = xSnprintf(buffer, sizeof(buffer), "%u", ctx->nNames);
    }
-   RichString_appendnAscii(out, valueDigitColor(nNames), buffer, len);
+   RichString_appendnAscii(out, valueDigitColor(ctx->nNames), buffer, len);
 
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " failed) (");
 
-   if (nJobs == INVALID_VALUE) {
+   if (ctx->nJobs == INVALID_VALUE) {
       buffer[0] = '?';
       buffer[1] = '\0';
       len = 1;
    } else {
-      len = xSnprintf(buffer, sizeof(buffer), "%u", nJobs);
+      len = xSnprintf(buffer, sizeof(buffer), "%u", ctx->nJobs);
    }
-   RichString_appendnAscii(out, zeroDigitColor(nJobs), buffer, len);
+   RichString_appendnAscii(out, zeroDigitColor(ctx->nJobs), buffer, len);
 
    RichString_appendAscii(out, CRT_colors[METER_TEXT], "/");
 
-   if (nInstalledJobs == INVALID_VALUE) {
+   if (ctx->nInstalledJobs == INVALID_VALUE) {
       buffer[0] = '?';
       buffer[1] = '\0';
       len = 1;
    } else {
-      len = xSnprintf(buffer, sizeof(buffer), "%u", nInstalledJobs);
+      len = xSnprintf(buffer, sizeof(buffer), "%u", ctx->nInstalledJobs);
    }
-   RichString_appendnAscii(out, valueDigitColor(nInstalledJobs), buffer, len);
+   RichString_appendnAscii(out, valueDigitColor(ctx->nInstalledJobs), buffer, len);
 
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " jobs)");
 }
 
+static void SystemdMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
+   _SystemdMeter_display(cast, out, &ctx_system);
+}
+
+static void SystemdUserMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
+   _SystemdMeter_display(cast, out, &ctx_user);
+}
+
 static const int SystemdMeter_attributes[] = {
    METER_VALUE
 };
@@ -382,3 +415,21 @@ const MeterClass SystemdMeter_class = {
    .description = "Systemd system state and unit overview",
    .caption = "Systemd: ",
 };
+
+const MeterClass SystemdUserMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete,
+      .display = SystemdUserMeter_display
+   },
+   .updateValues = SystemdMeter_updateValues,
+   .done = SystemdMeter_done,
+   .defaultMode = TEXT_METERMODE,
+   .maxItems = 0,
+   .total = 100.0,
+   .attributes = SystemdMeter_attributes,
+   .name = "SystemdUser",
+   .uiName = "Systemd user state",
+   .description = "Systemd user state and unit overview",
+   .caption = "Systemd User: ",
+};
diff --git a/linux/SystemdMeter.h b/linux/SystemdMeter.h
index a05e087..50a793b 100644
--- a/linux/SystemdMeter.h
+++ b/linux/SystemdMeter.h
@@ -13,4 +13,6 @@ in the source distribution for its full text.
 
 extern const MeterClass SystemdMeter_class;
 
+extern const MeterClass SystemdUserMeter_class;
+
 #endif /* HEADER_SystemdMeter */
diff --git a/linux/ZramMeter.c b/linux/ZramMeter.c
index e1e27b7..8329f01 100644
--- a/linux/ZramMeter.c
+++ b/linux/ZramMeter.c
@@ -1,3 +1,13 @@
+/*
+htop - linux/ZramMeter.c
+(C) 2020 Murloc Knight
+(C) 2020-2023 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
 #include "linux/ZramMeter.h"
 
 #include <stddef.h>
@@ -7,10 +17,12 @@
 #include "Object.h"
 #include "Platform.h"
 #include "RichString.h"
+#include "ZramMeter.h"
 
 
-static const int ZramMeter_attributes[] = {
-   ZRAM
+static const int ZramMeter_attributes[ZRAM_METER_ITEMCOUNT] = {
+   [ZRAM_METER_COMPRESSED] = ZRAM_COMPRESSED,
+   [ZRAM_METER_UNCOMPRESSED] = ZRAM_UNCOMPRESSED,
 };
 
 static void ZramMeter_updateValues(Meter* this) {
@@ -20,15 +32,13 @@ static void ZramMeter_updateValues(Meter* this) {
 
    Platform_setZramValues(this);
 
-   /* on print bar for compressed data size, not uncompressed */
-   this->curItems = 1;
-
-   written = Meter_humanUnit(buffer, this->values[0], size);
+   written = Meter_humanUnit(buffer, this->values[ZRAM_METER_COMPRESSED], size);
    METER_BUFFER_CHECK(buffer, size, written);
 
    METER_BUFFER_APPEND_CHR(buffer, size, '(');
 
-   written = Meter_humanUnit(buffer, this->values[1], size);
+   double uncompressed = this->values[ZRAM_METER_COMPRESSED] + this->values[ZRAM_METER_UNCOMPRESSED];
+   written = Meter_humanUnit(buffer, uncompressed, size);
    METER_BUFFER_CHECK(buffer, size, written);
 
    METER_BUFFER_APPEND_CHR(buffer, size, ')');
@@ -47,11 +57,12 @@ static void ZramMeter_display(const Object* cast, RichString* out) {
    Meter_humanUnit(buffer, this->total, sizeof(buffer));
    RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
 
-   Meter_humanUnit(buffer, this->values[0], sizeof(buffer));
+   Meter_humanUnit(buffer, this->values[ZRAM_METER_COMPRESSED], sizeof(buffer));
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " used:");
    RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
 
-   Meter_humanUnit(buffer, this->values[1], sizeof(buffer));
+   double uncompressed = this->values[ZRAM_METER_COMPRESSED] + this->values[ZRAM_METER_UNCOMPRESSED];
+   Meter_humanUnit(buffer, uncompressed, sizeof(buffer));
    RichString_appendAscii(out, CRT_colors[METER_TEXT], " uncompressed:");
    RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
 }
@@ -64,7 +75,7 @@ const MeterClass ZramMeter_class = {
    },
    .updateValues = ZramMeter_updateValues,
    .defaultMode = BAR_METERMODE,
-   .maxItems = 2,
+   .maxItems = ZRAM_METER_ITEMCOUNT,
    .total = 100.0,
    .attributes = ZramMeter_attributes,
    .name = "Zram",
diff --git a/linux/ZramMeter.h b/linux/ZramMeter.h
index ddba1ba..14a5215 100644
--- a/linux/ZramMeter.h
+++ b/linux/ZramMeter.h
@@ -1,8 +1,20 @@
 #ifndef HEADER_ZramMeter
 #define HEADER_ZramMeter
+/*
+htop - linux/ZramMeter.h
+(C) 2020 Murloc Knight
+(C) 2020-2023 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
 
 #include "Meter.h"
 
+typedef enum {
+   ZRAM_METER_COMPRESSED = 0,
+   ZRAM_METER_UNCOMPRESSED = 1,
+   ZRAM_METER_ITEMCOUNT = 2, // number of entries in this enum
+} ZramMeterValues;
 
 extern const MeterClass ZramMeter_class;
 
diff --git a/linux/ZramStats.h b/linux/ZramStats.h
index 67aadcc..f71a6c2 100644
--- a/linux/ZramStats.h
+++ b/linux/ZramStats.h
@@ -1,5 +1,13 @@
 #ifndef HEADER_ZramStats
 #define HEADER_ZramStats
+/*
+htop - ZramStats.h
+(C) 2020 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "ProcessTable.h"
 
 typedef struct ZramStats_ {
    memory_t totalZram;
diff --git a/linux/ZswapStats.h b/linux/ZswapStats.h
new file mode 100644
index 0000000..29e516f
--- /dev/null
+++ b/linux/ZswapStats.h
@@ -0,0 +1,19 @@
+#ifndef HEADER_ZswapStats
+#define HEADER_ZswapStats
+/*
+htop - ZswapStats.h
+(C) 2022 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "ProcessTable.h"
+
+typedef struct ZswapStats_ {
+   /* amount of RAM used by the zswap pool */
+   memory_t usedZswapComp;
+   /* amount of data stored inside the zswap pool */
+   memory_t usedZswapOrig;
+} ZswapStats;
+
+#endif
-- 
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