cgroup: keep track of number of descent cgroups

Keep track of the number of online and dying descent cgroups.

This data will be used later to add an ability to control cgroup
hierarchy (limit the depth and the number of descent cgroups)
and display hierarchy stats.

Signed-off-by: Roman Gushchin <[email protected]>
Suggested-by: Tejun Heo <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Cc: Zefan Li <[email protected]>
Cc: Waiman Long <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

0 files changed, 0 insertions, 0 deletions