linux-kernel - Re: FYI: mmap

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Message-ID: <alpine.DEB.2.00.1007121446500.8468@chino.kir.corp.google.com>
Date:	Mon, 12 Jul 2010 14:47:54 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
cc:	Peter Zijlstra <peterz@...radead.org>,
	Michel Lespinasse <walken@...gle.com>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Divyesh Shah <dpshah@...gle.com>, Ingo Molnar <mingo@...e.hu>
Subject: Re: FYI: mmap_sem OOM patch

On Thu, 8 Jul 2010, KOSAKI Motohiro wrote:

> I disagree. __GFP_NOFAIL mean this allocation failure can makes really
> dangerous result. Instead, OOM-Killer should try to kill next process.
> I think.
> 

That's not what happens, __alloc_pages_high_priority() will loop forever 
for __GFP_NOFAIL, the oom killer is never recalled.
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