linux-kernel - Re: [PATCH v3 05/28] memcg: Reclaim when more than one page needed.

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Message-ID: <alpine.DEB.2.00.1205290919130.4666@router.home>
Date:	Tue, 29 May 2012 09:20:16 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Glauber Costa <glommer@...allels.com>
cc:	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	linux-mm@...ck.org, kamezawa.hiroyu@...fujitsu.com,
	Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
	Greg Thelen <gthelen@...gle.com>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>, devel@...nvz.org,
	David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH v3 05/28] memcg: Reclaim when more than one page
 needed.

On Tue, 29 May 2012, Christoph Lameter wrote:

> >  	 * unlikely to succeed so close to the limit, and we fall back
> >  	 * to regular pages anyway in case of failure.
> >  	 */
> > -	if (nr_pages == 1 && ret)
> > +	if (nr_pages <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER) && ret) {

Should this not be

	 nr_pages <= 1 << PAGE_ALLOC_COSTLY_ORDER
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