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

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Message-ID: <20100416233405.GK20640@cmpxchg.org>
Date:	Sat, 17 Apr 2010 01:34:05 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mel@....ul.ie>
Cc:	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, Chris Mason <chris.mason@...cle.com>,
	Dave Chinner <david@...morbit.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH 10/10] vmscan: Update isolated page counters outside of main path in shrink_inactive_list()

On Thu, Apr 15, 2010 at 06:21:43PM +0100, 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>
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