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| author | Tejun Heo <tj@kernel.org> | 2014-11-18 08:49:51 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-11-18 08:49:51 +0100 |
| commit | 7d172cc89b8589e4173d0c73a1ddaae408f29c9d (patch) | |
| tree | ee1bb0594232895aaf2c5c6d604a2e4b8e2cbf4d /kernel | |
| parent | cgroup: fix the async css offline wait logic in cgroup_subtree_control_write() (diff) | |
| download | linux-7d172cc89b8589e4173d0c73a1ddaae408f29c9d.tar.xz linux-7d172cc89b8589e4173d0c73a1ddaae408f29c9d.zip | |
cgroup: add cgroup_subsys->css_released()
Add a new cgroup subsys callback css_released(). This is called when
the reference count of the css (cgroup_subsys_state) reaches zero
before RCU scheduling free.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Zefan Li <lizefan@huawei.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cgroup.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index dffa54041d4a..c8558693102b 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -4380,6 +4380,8 @@ static void css_release_work_fn(struct work_struct *work) if (ss) { /* css release path */ cgroup_idr_remove(&ss->css_idr, css->id); + if (ss->css_released) + ss->css_released(css); } else { /* cgroup release path */ cgroup_idr_remove(&cgrp->root->cgroup_idr, cgrp->id); |