diff options
| author | Muchun Song <songmuchun@bytedance.com> | 2021-06-28 19:38:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-29 10:53:50 -0700 |
| commit | 271dd6b1f636a99a3a77889935296c063f5a3cbe (patch) | |
| tree | 122aad40b6fcb4b1bdc1d7ffeaf1e56309008335 /mm/memcontrol.c | |
| parent | 9838354e16a2a920d5a228559850d10fa588a18d (diff) | |
mm: memcontrol: move obj_cgroup_uncharge_pages() out of css_set_lock
The css_set_lock is used to guard the list of inherited objcgs. So there
is no need to uncharge kernel memory under css_set_lock. Just move it out
of the lock.
Link: https://lkml.kernel.org/r/20210417043538.9793-8-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c79b6926fe83..f7a552eb3e9d 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -289,9 +289,10 @@ static void obj_cgroup_release(struct percpu_ref *ref) WARN_ON_ONCE(nr_bytes & (PAGE_SIZE - 1)); nr_pages = nr_bytes >> PAGE_SHIFT; - spin_lock_irqsave(&css_set_lock, flags); if (nr_pages) obj_cgroup_uncharge_pages(objcg, nr_pages); + + spin_lock_irqsave(&css_set_lock, flags); list_del(&objcg->list); spin_unlock_irqrestore(&css_set_lock, flags); |