The commit is pushed to "branch-rh7-3.10.0-514.vz7.27.x-ovz" and will appear at
https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-514.vz7.27.10
------>
commit 9931201ae279edcc3709932f9fcd2cf531f31909
Author: Johannes Weiner <han...@cmpxchg.org>
Date: Mon Jan 16 20:27:05 2017 +0400
ms/memcg: remove unnecessary !mm check from try_get_mem_cgroup_from_mm()
Users pass either a mm that has been established under task lock, or use
a verified current->mm, which means the task can't be exiting.
Signed-off-by: Johannes Weiner <han...@cmpxchg.org>
Acked-by: Michal Hocko <mho...@suse.cz>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
https://jira.sw.ru/browse/PSBM-51558
(cherry picked from commit 03583f1a631c0511dfd2f16e716d5b40f675de5a)
Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
---
mm/memcontrol.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 7b2a99f..d09d55d9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1170,13 +1170,6 @@ struct mem_cgroup *try_get_mem_cgroup_from_mm(struct
mm_struct *mm)
{
struct mem_cgroup *memcg = NULL;
- if (!mm)
- return NULL;
- /*
- * Because we have no locks, mm->owner's may be being moved to other
- * cgroup. We use css_tryget() here even if this looks
- * pessimistic (rather than adding locks here).
- */
rcu_read_lock();
do {
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
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