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

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Date:	Mon, 08 Dec 2014 10:16:34 +0100
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	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
Subject: Re: [PATCH 0/4] enhance compaction success rate

On 12/08/2014 08:16 AM, Joonsoo Kim wrote:
> 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

Did you test Patch-2 separately? Any difference to Patch 1?

> 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(-)
>

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