css release is planned to do more and would require process context.
Bounce it through css->destroy_work.
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
kernel/cgroup.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index bb67acb..b382383 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4125,10 +4125,10 @@ 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);
@@ -4136,6 +4136,15 @@ 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)
{
--
1.9.0
--
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