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SubjectRe: [patch 1/7] mm: memcg: only evict file pages when we have plenty
On 12/17/2012 01:12 PM, Johannes Weiner wrote:
> e986850 "mm, vmscan: only evict file pages when we have plenty" makes
> a point of not going for anonymous memory while there is still enough
> inactive cache around.
>
> The check was added only for global reclaim, but it is just as useful
> to reduce swapping in memory cgroup reclaim:
>
> 200M-memcg-defconfig-j2
>
> vanilla patched
> Real time 454.06 ( +0.00%) 453.71 ( -0.08%)
> User time 668.57 ( +0.00%) 668.73 ( +0.02%)
> System time 128.92 ( +0.00%) 129.53 ( +0.46%)
> Swap in 1246.80 ( +0.00%) 814.40 ( -34.65%)
> Swap out 1198.90 ( +0.00%) 827.00 ( -30.99%)
> Pages allocated 16431288.10 ( +0.00%) 16434035.30 ( +0.02%)
> Major faults 681.50 ( +0.00%) 593.70 ( -12.86%)
> THP faults 237.20 ( +0.00%) 242.40 ( +2.18%)
> THP collapse 241.20 ( +0.00%) 248.50 ( +3.01%)
> THP splits 157.30 ( +0.00%) 161.40 ( +2.59%)
>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> Acked-by: Michal Hocko <mhocko@suse.cz>

Acked-by: Rik van Riel <riel@redhat.com>

--
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