linux-kernel - Re: [patch for-3.2-rc3] cpusets: stall when updating mems_allowed for mempolicy or disjoint nodemask

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Message-ID: <4ECD9D43.6090202@cn.fujitsu.com>
Date:	Thu, 24 Nov 2011 09:26:27 +0800
From:	Miao Xie <miaox@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Paul Menage <paul@...lmenage.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch for-3.2-rc3] cpusets: stall when updating mems_allowed
 for mempolicy or disjoint nodemask

On Wed, 23 Nov 2011 14:26:40 -0800 (pst), David Rientjes wrote:
> On Wed, 23 Nov 2011, Miao Xie wrote:
> 
>> That nodemask is also protected by get_mems_allowed().
>>
> 
> So what's the problem with the patch? 

Memory compaction will see an empty nodemask and do nothing, and then
we may fail to get several contiguous pages.


> Can I add your acked-by?

Sure, no problem.
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