linux-kernel - Re: [PATCH 10/12] vmscan: Update isolated page counters outside of main path in shrink_inactive

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Message-ID: <4C168640.6080309@redhat.com>
Date:	Mon, 14 Jun 2010 15:42:56 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mel@....ul.ie>
CC:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, Dave Chinner <david@...morbit.com>,
	Chris Mason <chris.mason@...cle.com>,
	Nick Piggin <npiggin@...e.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Christoph Hellwig <hch@...radead.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 10/12] vmscan: Update isolated page counters outside of
 main path in shrink_inactive_list()

On 06/14/2010 07:17 AM, Mel Gorman wrote:
> When shrink_inactive_list() isolates pages, it updates a number of
> counters using temporary variables to gather them. These consume stack
> and it's in the main path that calls ->writepage(). This patch moves the
> accounting updates outside of the main path to reduce stack usage.
>
> Signed-off-by: Mel Gorman<mel@....ul.ie>
> Reviewed-by: Johannes Weiner<hannes@...xchg.org>

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

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