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    SubjectRe: [patch 1/7] mm: memcg: only evict file pages when we have plenty
    On Mon, Dec 17, 2012 at 01:12:31PM -0500, 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: Mel Gorman <mgorman@suse.de>

    --
    Mel Gorman
    SUSE Labs


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