Re: [PATCH next] memcg: remove PCG_CACHE page_cgroup flag fix2
From: KAMEZAWA Hiroyuki <hidden>
Date: 2012-03-01 09:17:40
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On Wed, 29 Feb 2012 18:42:57 -0800 (PST) Hugh Dickins [off-list ref] wrote:
Add comment to MEM_CGROUP_CHARGE_TYPE_MAPPED case in __mem_cgroup_uncharge_common(). Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: KAMEZAWA Hiroyuki <redacted>
quoted hunk ↗ jump to hunk
--- This one incremental to patch already in mm-commits. mm/memcontrol.c | 5 +++++ 1 file changed, 5 insertions(+)--- mm-commits/mm/memcontrol.c 2012-02-28 20:45:43.488100423 -0800 +++ linux/mm/memcontrol.c 2012-02-29 18:21:49.144702180 -0800@@ -2953,6 +2953,11 @@ __mem_cgroup_uncharge_common(struct page switch (ctype) { case MEM_CGROUP_CHARGE_TYPE_MAPPED: + /* + * Generally PageAnon tells if it's the anon statistics to be + * updated; but sometimes e.g. mem_cgroup_uncharge_page() is + * used before page reached the stage of being marked PageAnon. + */ anon = true; /* fallthrough */ case MEM_CGROUP_CHARGE_TYPE_DROP:
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