From: Johannes Weiner <han...@cmpxchg.org> 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)); -- 2.10.2 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
