cgroup: factor out cgroup_drain_offline() from cgroup_subtree_control_write()

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Factor out async css offline draining into cgroup_drain_offline().

* Nest subsystem walk inside child walk.  The child walk will later be
  converted to subtree walk which is a bit more expensive.

* Relocate the draining above subsystem mask preparation, which
  doesn't create any behavior differences but helps further
  refactoring.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Zefan Li <lizefan@huawei.com>

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Tejun Heo 2016-03-03 09:57:59 -05:00

parent 5531dc915b

commit 1b9b96a12b

1 changed files with 52 additions and 25 deletions

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kernel/cgroup.c

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