init/cgroups.conf

# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description     "mount cgroups on /sys/fs/cgroup"
author          "chromium-os-dev@chromium.org"

start on starting boot-services
task

script
  log() {
    logger -t "${UPSTART_JOB}" "failed to mount cgroup susbsystem $1"
  }

  mount -t tmpfs -o mode=755,noexec,nosuid,nodev none /sys/fs/cgroup
  for subsys in cpu freezer devices cpuacct cpuset; do
    mkdir -p /sys/fs/cgroup/${subsys}
    mount -t cgroup cgroup /sys/fs/cgroup/${subsys} \
          -o ${subsys},noexec,nosuid,nodev || log ${subsys}
    mkdir -p /sys/fs/cgroup/${subsys}/session_manager_containers
    if [ $(id -u android-root) ]; then
      chown android-root:android-root \
          /sys/fs/cgroup/${subsys}/session_manager_containers
    fi
  done

  # Create and set up Chrome cpusets with default settings
  # (all cpus, all mems).
  cpuset_root_dir="/sys/fs/cgroup/cpuset"
  cpuset_root_cpus=$(cat "${cpuset_root_dir}/cpuset.cpus")
  cpuset_root_mems=$(cat "${cpuset_root_dir}/cpuset.mems")
  for cset in chrome chrome/urgent chrome/non-urgent; do
    cset_dir="/sys/fs/cgroup/cpuset/${cset}"
    mkdir "${cset_dir}"
    chown -R chronos:chronos "${cset_dir}"
    echo "${cpuset_root_cpus}" > "${cset_dir}/cpuset.cpus"
    echo "${cpuset_root_mems}" > "${cset_dir}/cpuset.mems"
  done

end script