linux-kernel - [patch 0/2] memcg: clean up limit checking

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Message-ID: <20110203125357.GA2286@cmpxchg.org>
Date:	Thu, 3 Feb 2011 13:53:57 +0100
From:	Johannes Weiner <hannes@...xchg.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	kamezawa.hiroyu@...fujitsu.com, nishimura@....nes.nec.co.jp,
	balbir@...ux.vnet.ibm.com, minchan.kim@...il.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [patch 0/2] memcg: clean up limit checking

On Mon, Jan 31, 2011 at 04:24:48PM -0800, Andrew Morton wrote:
> On Tue, 1 Feb 2011 01:04:55 +0100
> Johannes Weiner <hannes@...xchg.org> wrote:
> 
> > Maybe it would be better to use res_counter_margin(cnt) >= wanted
> > throughout the code.
> 
> yup.

Okay, I cleaned it all up a bit for .39.  While doing so, I also found
that we are reclaiming one page too much when pushing back on behalf
of soft limits.

So 1/2 fixes the soft limit reclaim off-by-one-page, and 2/2 reduces
all the limit checks to two functions.
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