linux-kernel - Re: [PATCH 1/4] Properly account for the number of page cache pages zone

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Date:	Tue, 09 Jun 2009 14:15:02 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mel@....ul.ie>
CC:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	yanmin.zhang@...el.com, Wu Fengguang <fengguang.wu@...el.com>,
	linuxram@...ibm.com, linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] Properly account for the number of page cache pages
 zone_reclaim() can reclaim

Mel Gorman wrote:

> This patch alters how zone_reclaim() works out how many pages it might be
> able to reclaim given the current reclaim_mode. If RECLAIM_SWAP is set
> in the reclaim_mode it will either consider NR_FILE_PAGES as potential
> candidates or else use NR_{IN}ACTIVE}_PAGES-NR_FILE_MAPPED to discount
> swapcache and other non-file-backed pages.  If RECLAIM_WRITE is not set,
> then NR_FILE_DIRTY number of pages are not candidates. If RECLAIM_SWAP is
> not set, then NR_FILE_MAPPED are not.
> 
> Signed-off-by: Mel Gorman <mel@....ul.ie>
> Acked-by: Christoph Lameter <cl@...ux-foundation.org>

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

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