linux-kernel - Re: [PATCH 2/6] mm: vmscan: Scale number of pages reclaimed by reclaim/compaction based on failures

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Date:	Tue, 07 Aug 2012 09:23:38 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
CC:	Linux-MM <linux-mm@...ck.org>, Minchan Kim <minchan@...nel.org>,
	Jim Schutt <jaschut@...dia.gov>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/6] mm: vmscan: Scale number of pages reclaimed by reclaim/compaction
 based on failures

On 08/07/2012 08:31 AM, Mel Gorman wrote:
> If allocation fails after compaction then compaction may be deferred for
> a number of allocation attempts. If there are subsequent failures,
> compact_defer_shift is increased to defer for longer periods. This patch
> uses that information to scale the number of pages reclaimed with
> compact_defer_shift until allocations succeed again.
>
> Signed-off-by: Mel Gorman<mgorman@...e.de>

Acked-by: Rik van Riel <riel@...hat.com>


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