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Message-ID: <20121218095621.GJ9887@suse.de> Date: Tue, 18 Dec 2012 09:56:21 +0000 From: Mel Gorman <mgorman@...e.de> To: Johannes Weiner <hannes@...xchg.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, Rik van Riel <riel@...hat.com>, Michal Hocko <mhocko@...e.cz>, Hugh Dickins <hughd@...gle.com>, Satoru Moriya <satoru.moriya@....com>, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [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@...xchg.org> > Acked-by: Michal Hocko <mhocko@...e.cz> Acked-by: Mel Gorman <mgorman@...e.de> -- Mel Gorman SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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