Subject: [merged] memcg-remove-unnecessary-mm-check-from-try_get_mem_cgroup_from_mm.patch removed from -mm tree
To: hannes@xxxxxxxxxxx,mhocko@xxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 08 Apr 2014 13:52:04 -0700
The patch titled
Subject: memcg: remove unnecessary !mm check from try_get_mem_cgroup_from_mm()
has been removed from the -mm tree. Its filename was
memcg-remove-unnecessary-mm-check-from-try_get_mem_cgroup_from_mm.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: 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 <hannes@xxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 7 -------
1 file changed, 7 deletions(-)
diff -puN mm/memcontrol.c~memcg-remove-unnecessary-mm-check-from-try_get_mem_cgroup_from_mm mm/memcontrol.c
--- a/mm/memcontrol.c~memcg-remove-unnecessary-mm-check-from-try_get_mem_cgroup_from_mm
+++ a/mm/memcontrol.c
@@ -1075,13 +1075,6 @@ struct mem_cgroup *try_get_mem_cgroup_fr
{
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));
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
origin.patch
mm-vmscan-do-not-swap-anon-pages-just-because-freefile-is-low.patch
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