linux-kernel - Re: [PATCH 2/7] mm: vmscan: Remove dead code related to lumpy reclaim waiting on pages under writeback

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Message-ID: <20110810124147.GB24133@redhat.com>
Date:	Wed, 10 Aug 2011 14:41:47 +0200
From:	Johannes Weiner <jweiner@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Linux-MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	XFS <xfs@....sgi.com>, Dave Chinner <david@...morbit.com>,
	Christoph Hellwig <hch@...radead.org>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH 2/7] mm: vmscan: Remove dead code related to lumpy
 reclaim waiting on pages under writeback

On Wed, Aug 10, 2011 at 11:47:15AM +0100, Mel Gorman wrote:
> Lumpy reclaim worked with two passes - the first which queued pages for
> IO and the second which waited on writeback. As direct reclaim can no
> longer write pages there is some dead code. This patch removes it but
> direct reclaim will continue to wait on pages under writeback while in
> synchronous reclaim mode.
> 
> Signed-off-by: Mel Gorman <mgorman@...e.de>

Acked-by: Johannes Weiner <jweiner@...hat.com>
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