linux-kernel - [PATCH 0/4] enhance compaction success rate

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Date:	Mon,  8 Dec 2014 16:16:16 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Vlastimil Babka <vbabka@...e.cz>, Mel Gorman <mgorman@...e.de>,
	David Rientjes <rientjes@...gle.com>,
	Rik van Riel <riel@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH 0/4] enhance compaction success rate

This patchset aims at increase of compaction success rate. Changes are
related to compaction finish condition and freepage isolation condition.

>From these changes, I did stress highalloc test in mmtests with nonmovable
order 7 allocation configuration, and success rate (%) at phase 1 are,

Base	Patch-1	Patch-3	Patch-4
55.00	57.00	62.67	64.00

And, compaction success rate (%) on same test are,

Base	Patch-1	Patch-3	Patch-4
18.47	28.94	35.13	41.50

This patchset is based on my tracepoint update on compaction.

https://lkml.org/lkml/2014/12/3/71

Joonsoo Kim (4):
  mm/compaction: fix wrong order check in compact_finished()
  mm/page_alloc: expands broken freepage to proper buddy list when
    steal
  mm/compaction: enhance compaction finish condition
  mm/compaction: stop the isolation when we isolate enough freepage

 include/linux/mmzone.h      |    3 ++
 include/trace/events/kmem.h |    7 +++--
 mm/compaction.c             |   48 ++++++++++++++++++++++------
 mm/internal.h               |    1 +
 mm/page_alloc.c             |   73 +++++++++++++++++++++++++------------------
 5 files changed, 89 insertions(+), 43 deletions(-)

-- 
1.7.9.5

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