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

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Message-Id: <20110811181913.ea81b7e0.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 11 Aug 2011 18:19:13 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.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>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH 7/7] mm: vmscan: Immediately reclaim end-of-LRU dirty
 pages when writeback completes

On Wed, 10 Aug 2011 11:47:20 +0100
Mel Gorman <mgorman@...e.de> 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>

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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