The patch titled Subject: mm/memcontrol.c: lost css_put in memcg_expand_shrinker_maps() has been added to the -mm tree. Its filename is memcg-lost-css_put-in-memcg_expand_shrinker_maps.patch
This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/memcg-lost-css_put-in-memcg_expand_... and later at http://ozlabs.org/~akpm/mmotm/broken-out/memcg-lost-css_put-in-memcg_expand_...
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------------------------------------------------------ From: Vasily Averin vvs@virtuozzo.com Subject: 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 ---
mm/memcontrol.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/mm/memcontrol.c~memcg-lost-css_put-in-memcg_expand_shrinker_maps +++ a/mm/memcontrol.c @@ -409,8 +409,10 @@ int memcg_expand_shrinker_maps(int new_i 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) _
Patches currently in -mm which might be from vvs@virtuozzo.com are
memcg-lost-css_put-in-memcg_expand_shrinker_maps.patch