resourced/init/resourced.conf

# Copyright 2021 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description   "Start the Chromium OS Resource Manager daemon"
author        "chromium-os-dev@chromium.org"

start on started system-services
stop on stopping system-services

# Minijail forks off the desired process.
expect fork

# If the job respawns 10 times in 10 seconds, stop trying.
respawn
respawn limit 10 10

# resourced handles low memory situations and shall not be OOM-killed.
oom score never

# Let the daemon crash if it grows too much. "as" is "address space" (VM
# size). The typical VM size of resourced is about 14MB. Set the limit to
# about 3x typical VM size.
limit as 45000000 unlimited

script
  # powercap does not exist on ARM devies, conditionally bind mount.
  POWER_CAP_MOUNT=""
  if [ -d "/sys/class/powercap" ]; then
    POWER_CAP_MOUNT="-b /sys/class/powercap,,1 "
  fi

  # The transparent huge page(THP) path exists when THP is enabled.
  THP_MOUNT=""
  if [ -d "/sys/kernel/mm/transparent_hugepage" ]; then
    THP_MOUNT="-b /sys/kernel/mm/transparent_hugepage,,1"
  fi

  # The sched debugfs path is used to tune the scheduler. Depending on the
  # kernel/scheduler used, the path might not exist.
  SCHED_MOUNT=""
  if [ -d "/sys/kernel/debug/sched" ]; then
    SCHED_MOUNT="-b /sys/kernel/debug/sched,,1"
  fi

  exec minijail0                                                        \
    --config /usr/share/minijail/resourced.conf                         \
    --seccomp-bpf-binary /usr/share/policy/resourced-seccomp.policy.bpf \
    ${POWER_CAP_MOUNT}                                                  \
    ${THP_MOUNT}                                                        \
    ${SCHED_MOUNT}                                                      \
    -- /usr/bin/resourced
end script

tmpfiles /usr/lib/tmpfiles.d/on-demand/resourced.conf