diff options
| author | Grant Likely <grant.likely@linaro.org> | 2014-03-31 08:10:55 +0100 |
|---|---|---|
| committer | Grant Likely <grant.likely@linaro.org> | 2014-03-31 08:10:55 +0100 |
| commit | d88cf7d7b4240b8df170ba105e414e476fb51cce (patch) | |
| tree | 7efe976da6e0ec854eb0eeda82c1e9a275b8c69f /mm/memcontrol.c | |
| parent | 676e1b2fcd9dbb47a59baac13d089621d22c68b8 (diff) | |
| parent | 6f976267da0e2c873c4b4aaacaf08266d1d1797d (diff) | |
Merge remote-tracking branch 'robh/for-next' into devicetree/next
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ce7a8cc7b404..5b6b0039f725 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1127,8 +1127,8 @@ skip_node: * skipping css reference should be safe. */ if (next_css) { - if ((next_css->flags & CSS_ONLINE) && - (next_css == &root->css || css_tryget(next_css))) + if ((next_css == &root->css) || + ((next_css->flags & CSS_ONLINE) && css_tryget(next_css))) return mem_cgroup_from_css(next_css); prev_css = next_css; @@ -6595,6 +6595,7 @@ static void mem_cgroup_css_offline(struct cgroup_subsys_state *css) { struct mem_cgroup *memcg = mem_cgroup_from_css(css); struct mem_cgroup_event *event, *tmp; + struct cgroup_subsys_state *iter; /* * Unregister events and notify userspace. @@ -6611,7 +6612,14 @@ static void mem_cgroup_css_offline(struct cgroup_subsys_state *css) kmem_cgroup_css_offline(memcg); mem_cgroup_invalidate_reclaim_iterators(memcg); - mem_cgroup_reparent_charges(memcg); + + /* + * This requires that offlining is serialized. Right now that is + * guaranteed because css_killed_work_fn() holds the cgroup_mutex. + */ + css_for_each_descendant_post(iter, css) + mem_cgroup_reparent_charges(mem_cgroup_from_css(iter)); + mem_cgroup_destroy_all_caches(memcg); vmpressure_cleanup(&memcg->vmpressure); } |