linux-kernel - Re: [patch 1/9] x86, ioapic: fix potential resume deadlock

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Message-ID: <20110520000903.2d8d05a4@katamari>
Date:	Fri, 20 May 2011 00:09:03 -0400
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	mingo@...e.hu, tglx@...utronix.de, hpa@...or.com,
	linux-kernel@...r.kernel.org, daniel.blueman@...il.com,
	suresh.b.siddha@...el.com, <stable@...nel.org>
Subject: Re: [patch 1/9] x86, ioapic: fix potential resume deadlock

On Wed, 18 May 2011 16:31:31 -0700
Suresh Siddha <suresh.b.siddha@...el.com> wrote:

> From: Daniel J Blueman <daniel.blueman@...il.com>
> 
> Fix a potential deadlock when resuming; here the calling function
> has disabled interrupts, so we cannot sleep.
> 
> Change the memory allocation flag from GFP_KERNEL to GFP_ATOMIC.
> 
> TODO: We can do away with this memory allocation during resume by
> reusing the ioapic suspend/resume code that uses boot time allocated
> buffers.
> 
> Signed-off-by: Daniel J Blueman <daniel.blueman@...il.com>
> Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com>
> Cc: <stable@...nel.org>     # v2.6.39

This is happening on 2.6.38 as well.
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