memcg: debugging facility to access dangling memcgs.
If memcg is tracking anything other than plain user memory (swap, tcp
buf mem, or slab memory), it is possible that a reference will be held
by the group after it is dead.
This patch provides a debugging facility in the root memcg, so we can
inspect which memcgs still have pending objects, and what is the cause
of this state.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
1 file changed
