linux-kernel - Re: [patch 1/5] mm: add nofail variants of kmalloc kcalloc and kzalloc

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Message-ID: <alpine.DEB.2.00.1008251359290.16484@chino.kir.corp.google.com>
Date:	Wed, 25 Aug 2010 13:59:55 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	"Ted Ts'o" <tytso@....edu>, Peter Zijlstra <peterz@...radead.org>,
	Dave Chinner <david@...morbit.com>,
	Jens Axboe <jaxboe@...ionio.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Neil Brown <neilb@...e.de>, Alasdair G Kergon <agk@...hat.com>,
	Chris Mason <chris.mason@...cle.com>,
	Steven Whitehouse <swhiteho@...hat.com>,
	Jan Kara <jack@...e.cz>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
	"linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>,
	"cluster-devel@...hat.com" <cluster-devel@...hat.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"reiserfs-devel@...r.kernel.org" <reiserfs-devel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [patch 1/5] mm: add nofail variants of kmalloc kcalloc and
 kzalloc

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.
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