linux-kernel - Re: hibernation hangs with ATA errors (lockup

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Message-ID: <4C076521.8050108@gmail.com>
Date:	Thu, 03 Jun 2010 10:17:37 +0200
From:	Tejun Heo <htejun@...il.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
CC:	Don Zickus <dzickus@...hat.com>, Jeff Garzik <jgarzik@...ox.com>,
	Jiri Slaby <jirislaby@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	linux-ide@...r.kernel.org
Subject: Re: hibernation hangs with ATA errors (lockup_detector bug)

Hello,

On 06/02/2010 09:43 PM, Frederic Weisbecker wrote:
> But I'm eventually surprised about this: stopping the cpu hotplug callbacks
> prevents some ATA resume callbacks to execute.
> 
> Does that mean some ata resume path are done from a cpu hotplug notifier?
> That looks weird.

libata itself doesn't use any cpu hotplug notifier.  It just uses
suspend and resume callbacks.  It looks like somehow IRQ delivery is
screwed up?

Thanks.

-- 
tejun
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