From: David Rientjes <rientjes@google.com>
Subject: Re: [patch 1/5] mm: add nofail variants of kmalloc kcalloc and
 kzalloc
Date: Wed, 25 Aug 2010 13:59:55 -0700 (PDT)
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To: "Ted Ts'o" <tytso@mit.edu>, Peter Zijlstra <peterz@infradead.org>,
	Dave Chinner <david@fromorbit.com>,
	Jens Axboe <jaxboe@fusionio.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ne
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On Wed, 25 Aug 2010, Ted Ts'o wrote:

> A pool of free pages which is reserved for routines that are doing
> page cleaning would probably also be a good idea.  Maybe that's just
> retrying with GFP_ATOMIC if a normal allocation fails, or maybe we
> need our own special pool, or maybe we need to dynamically resize the
> GFP_ATOMIC pool based on how many subsystems might need to use it....
> 

PF_MEMALLOC is used for those tasks, not GFP_ATOMIC.