linux-kernel - Re: [PATCH 04/11] mm: vmscan: Do not OOM if aborting reclaim to start compaction

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Message-ID: <4EEA8470.9040907@redhat.com>
Date:	Thu, 15 Dec 2011 18:36:16 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Dave Jones <davej@...hat.com>, Jan Kara <jack@...e.cz>,
	Andy Isaacson <adi@...apodia.org>,
	Johannes Weiner <jweiner@...hat.com>,
	Nai Xia <nai.xia@...il.com>, Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 04/11] mm: vmscan: Do not OOM if aborting reclaim to start
 compaction

On 12/14/2011 10:41 AM, Mel Gorman wrote:
> During direct reclaim it is possible that reclaim will be aborted so
> that compaction can be attempted to satisfy a high-order allocation. If
> this decision is made before any pages are reclaimed, it is possible
> that 0 is returned to the page allocator potentially triggering an
> OOM. This has not been observed but it is a possibility so this patch
> addresses it.
>
> Signed-off-by: Mel Gorman<mgorman@...e.de>

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

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