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cgroup: bounce css release through css->destroy_work 

css release is planned to do more and would require process context.
Bounce it through css->destroy_work.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo 2014-05-14 09:15:02 -04:00
parent 249f3468a2
commit 25e15d8350
1 changed files with 11 additions and 2 deletions
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13
kernel/cgroup.c
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@ -4126,10 +4126,10 @@ static void css_free_rcu_fn(struct rcu_head *rcu_head)
queue_work(cgroup_destroy_wq, &css->destroy_work);
}
static void css_release(struct percpu_ref *ref)
static void css_release_work_fn(struct work_struct *work)
{
struct cgroup_subsys_state *css =
container_of(ref, struct cgroup_subsys_state, refcnt);
container_of(work, struct cgroup_subsys_state, destroy_work);
struct cgroup_subsys *ss = css->ss;
cgroup_idr_remove(&ss->css_idr, css->id);
@ -4137,6 +4137,15 @@ static void css_release(struct percpu_ref *ref)
call_rcu(&css->rcu_head, css_free_rcu_fn);
}
static void css_release(struct percpu_ref *ref)
{
struct cgroup_subsys_state *css =
container_of(ref, struct cgroup_subsys_state, refcnt);
INIT_WORK(&css->destroy_work, css_release_work_fn);
queue_work(cgroup_destroy_wq, &css->destroy_work);
}
static void init_and_link_css(struct cgroup_subsys_state *css,
struct cgroup_subsys *ss, struct cgroup *cgrp)
{