From: Mel Gorman <mgorman@suse.de>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Rik van Riel <riel@redhat.com>, Michal Hocko <mhocko@suse.cz>,
Hugh Dickins <hughd@google.com>,
Satoru Moriya <satoru.moriya@hds.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [patch 1/7] mm: memcg: only evict file pages when we have plenty
Date: Tue, 18 Dec 2012 09:56:21 +0000 [thread overview]
Message-ID: <20121218095621.GJ9887@suse.de> (raw)
In-Reply-To: <1355767957-4913-2-git-send-email-hannes@cmpxchg.org>
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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next prev parent reply other threads:[~2012-12-18 9:56 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-17 18:12 [patch 0/8] page reclaim bits v2 Johannes Weiner
2012-12-17 18:12 ` [patch 1/7] mm: memcg: only evict file pages when we have plenty Johannes Weiner
2012-12-17 18:15 ` Rik van Riel
2012-12-18 9:56 ` Mel Gorman [this message]
2012-12-17 18:12 ` [patch 2/7] mm: vmscan: save work scanning (almost) empty LRU lists Johannes Weiner
2012-12-19 23:59 ` Andrew Morton
2012-12-20 13:55 ` Michal Hocko
2012-12-21 3:02 ` Johannes Weiner
2012-12-17 18:12 ` [patch 3/7] mm: vmscan: clarify how swappiness, highest priority, memcg interact Johannes Weiner
2012-12-17 18:16 ` Rik van Riel
2012-12-17 19:37 ` Satoru Moriya
2012-12-17 20:05 ` Michal Hocko
2012-12-18 10:04 ` Mel Gorman
2012-12-18 15:16 ` Satoru Moriya
2012-12-17 18:12 ` [patch 4/7] mm: vmscan: improve comment on low-page cache handling Johannes Weiner
2012-12-17 18:12 ` [patch 5/7] mm: vmscan: clean up get_scan_count() Johannes Weiner
2012-12-20 0:08 ` Andrew Morton
2012-12-21 2:49 ` Johannes Weiner
2012-12-17 18:12 ` [patch 6/7] mm: vmscan: compaction works against zones, not lruvecs Johannes Weiner
2012-12-17 18:12 ` [patch 7/7] mm: reduce rmap overhead for ex-KSM page copies created on swap faults Johannes Weiner
2012-12-17 22:42 ` Hugh Dickins
2012-12-19 7:01 ` Simon Jeons
2012-12-19 17:58 ` Johannes Weiner
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