]> git.proxmox.com Git - mirror_ubuntu-disco-kernel.git/commit
mm: memcontrol: convert reclaim iterator to simple css refcounting
authorJohannes Weiner <hannes@cmpxchg.org>
Wed, 10 Dec 2014 23:42:39 +0000 (15:42 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 11 Dec 2014 01:41:05 +0000 (17:41 -0800)
commit5ac8fb31ad2ebd6492d1c5e8f31846b532f03945
tree909758da585c63aa3de2639a42dcd63f5ab1bf35
parent5b1efc027c0b51ca3e76f4e00c83358f8349f543
mm: memcontrol: convert reclaim iterator to simple css refcounting

The memcg reclaim iterators use a complicated weak reference scheme to
prevent pinning cgroups indefinitely in the absence of memory pressure.

However, during the ongoing cgroup core rework, css lifetime has been
decoupled such that a pinned css no longer interferes with removal of
the user-visible cgroup, and all this complexity is now unnecessary.

[mhocko@suse.cz: ensure that the cached reference is always released]
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memcontrol.c