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| author | Vasily Averin <vvs@virtuozzo.com> | 2020-02-20 20:04:18 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-02-21 11:22:15 -0800 |
| commit | 75866af62b439859d5146b7093ceb6b482852683 (patch) | |
| tree | e7e0b1bffcc04b8a7cbae61084d8fb70255b8a78 | |
| parent | fed98ef4d8b665316479dd35cbd92d3e2ff470a3 (diff) | |
| download | linux-75866af62b439859d5146b7093ceb6b482852683.tar.gz linux-75866af62b439859d5146b7093ceb6b482852683.tar.bz2 linux-75866af62b439859d5146b7093ceb6b482852683.zip | |
mm/memcontrol.c: lost css_put in memcg_expand_shrinker_maps()
for_each_mem_cgroup() increases css reference counter for memory cgroup
and requires to use mem_cgroup_iter_break() if the walk is cancelled.
Link: http://lkml.kernel.org/r/c98414fb-7e1f-da0f-867a-9340ec4bd30b@virtuozzo.com
Fixes: 0a4465d34028 ("mm, memcg: assign memcg-aware shrinkers bitmap to memcg")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Roman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memcontrol.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6f6dc8712e39..d09776cd6e10 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -409,8 +409,10 @@ int memcg_expand_shrinker_maps(int new_id) if (mem_cgroup_is_root(memcg)) continue; ret = memcg_expand_one_shrinker_map(memcg, size, old_size); - if (ret) + if (ret) { + mem_cgroup_iter_break(NULL, memcg); goto unlock; + } } unlock: if (!ret) |