path: root/mm
diff options
authorVladimir Davydov <vdavydov@parallels.com>2015-03-12 16:26:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-03-12 18:46:08 -0700
commit7feee590bb18ffc42636975f74c2c3120ce1901c (patch)
tree58e0fcfa29b1d7a84c7688062a8374464739b7eb /mm
parentmm: reorder can_do_mlock to fix audit denial (diff)
memcg: disable hierarchy support if bound to the legacy cgroup hierarchy
If the memory cgroup controller is initially mounted in the scope of the default cgroup hierarchy and then remounted to a legacy hierarchy, it will still have hierarchy support enabled, which is incorrect. We should disable hierarchy support if bound to the legacy cgroup hierarchy. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9fe07692eaad..b34ef4a32a3b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5232,7 +5232,9 @@ static void mem_cgroup_bind(struct cgroup_subsys_state *root_css)
* on for the root memcg is enough.
if (cgroup_on_dfl(root_css->cgroup))
- mem_cgroup_from_css(root_css)->use_hierarchy = true;
+ root_mem_cgroup->use_hierarchy = true;
+ else
+ root_mem_cgroup->use_hierarchy = false;
static u64 memory_current_read(struct cgroup_subsys_state *css,