From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alasdair G Kergon <agk@redhat.com>
Subject: Re: [PATCH 4/8] [dm-bio-prison] Change the
	bio-prison	interface so the memory for the cells is passed in.
Date: Tue, 22 Jan 2013 12:10:32 +0000
Message-ID: <20130122121032.GI27093@agk-dp.fab.redhat.com>
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On Tue, Jan 22, 2013 at 11:31:49AM +0000, Joe Thornber wrote:
> Note the mempool alloc _can_ fail with GFP_NOIO/GFP_NOWAIT.

Not with GFP_NOIO.

include/linux/gfp.h:
#define GFP_NOIO        (__GFP_WAIT)

mempool_alloc():
        might_sleep_if(gfp_mask & __GFP_WAIT);

Alasdair