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

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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>

...

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Johannes Weiner 2014-08-06 16:06:04 -07:00 • committed by Linus Torvalds

parent 9a2385eef9

commit a840cda63e

1 changed files with 7 additions and 14 deletions

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mm/memcontrol.c

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