tree 4e16e7a67514e3e3cbcd9368fdfeab8fd76f01f2
parent 9a2385eef9f28fb5260c48c45fc8fe01f1da70a6
author Johannes Weiner <hannes@cmpxchg.org> 1407366364 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1407373277 -0700

mm: memcontrol: do not acquire page_cgroup lock for kmem pages

Kmem page charging and uncharging is serialized by means of exclusive
access to the page.  Do not take the page_cgroup lock and don't set
pc->flags atomically.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>