linux-kernel - Re: [patch 1/2] mm: vmscan: fix force-scanning small targets without swap

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Message-Id: <20110831163706.2b7ed5af.akpm@linux-foundation.org>
Date:	Wed, 31 Aug 2011 16:37:06 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Johannes Weiner <jweiner@...hat.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>, Ying Han <yinghan@...gle.com>,
	Balbir Singh <bsingharora@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [patch 1/2] mm: vmscan: fix force-scanning small targets
 without swap

On Mon, 29 Aug 2011 18:08:39 +0200
Johannes Weiner <jweiner@...hat.com> wrote:

> Andrew,
> 
> On Thu, Aug 11, 2011 at 10:31:54PM +0200, Johannes Weiner wrote:
> > Without swap, anonymous pages are not scanned.  As such, they should
> > not count when considering force-scanning a small target if there is
> > no swap.
> > 
> > Otherwise, targets are not force-scanned even when their effective
> > scan number is zero and the other conditions--kswapd/memcg--apply.
> 
> I forgot to mention, this patch is a fix for '246e87a memcg: fix
> get_scan_count() for small targets', which went upstream this merge
> window.
> 
> Probably makes sense to merge this one too before the release..?
> 

Ah, I didn't realise that.  Thanks.
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