linux-kernel - Re: [PATCH 7/7] mm: vmscan: Immediately reclaim end-of-LRU dirty pages when writeback completes

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Date:	Fri, 12 Aug 2011 11:27:18 -0400
From:	Rik van Riel <riel@...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>,
	Johannes Weiner <jweiner@...hat.com>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH 7/7] mm: vmscan: Immediately reclaim end-of-LRU dirty
 pages when writeback completes

On 08/10/2011 06:47 AM, Mel Gorman wrote:
> When direct reclaim encounters a dirty page, it gets recycled around
> the LRU for another cycle. This patch marks the page PageReclaim
> similar to deactivate_page() so that the page gets reclaimed almost
> immediately after the page gets cleaned. This is to avoid reclaiming
> clean pages that are younger than a dirty page encountered at the
> end of the LRU that might have been something like a use-once page.
>
> Signed-off-by: Mel Gorman<mgorman@...e.de>
> Acked-by: Johannes Weiner<jweiner@...hat.com>

I'm thinking we may need to add some code to
ClearPageReclaim to mark_page_accessed, but
that would be completely independent of these
patches, so ...

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

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