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Re: [PATCH 2/7] mm: vmscan: Remove dead code related to lumpy reclaim wa

To: Mel Gorman <mgorman@xxxxxxx>
Subject: Re: [PATCH 2/7] mm: vmscan: Remove dead code related to lumpy reclaim waiting on pages under writeback
From: Rik van Riel <riel@xxxxxxxxxx>
Date: Thu, 11 Aug 2011 12:52:41 -0400
Cc: Linux-MM <linux-mm@xxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, XFS <xfs@xxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Johannes Weiner <jweiner@xxxxxxxxxx>, Wu Fengguang <fengguang.wu@xxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Minchan Kim <minchan.kim@xxxxxxxxx>
In-reply-to: <1312973240-32576-3-git-send-email-mgorman@xxxxxxx>
References: <1312973240-32576-1-git-send-email-mgorman@xxxxxxx> <1312973240-32576-3-git-send-email-mgorman@xxxxxxx>
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.7) Gecko/20100720 Fedora/3.1.1-1.fc13 Lightning/1.0b2pre Thunderbird/3.1.1
On 08/10/2011 06:47 AM, 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@xxxxxxx>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>

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