linux-kernel - Re: [linux-pm] Re: [linux-lvm] 2.6.22-rc4 XFS fails after hibernate/resume

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Message-ID: <20070629050024.GO31489@sgi.com>
Date:	Fri, 29 Jun 2007 15:00:24 +1000
From:	David Chinner <dgc@....com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Pavel Machek <pavel@....cz>, David Chinner <dgc@....com>,
	linux-pm <linux-pm@...ts.osdl.org>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	xfs@....sgi.com, LinuxRaid <linux-raid@...r.kernel.org>,
	LVM general discussion and development 
	<linux-lvm@...hat.com>, David Robinson <zxvdr.au@...il.com>,
	David Greaves <david@...eaves.com>,
	Oleg Nesterov <oleg@...sign.ru>
Subject: Re: [linux-pm] Re: [linux-lvm] 2.6.22-rc4 XFS fails after hibernate/resume

On Fri, Jun 29, 2007 at 12:16:44AM +0200, Rafael J. Wysocki wrote:
> There are two solutions possible, IMO.  One would be to make these workqueues
> freezable, which is possible, but hacky and Oleg didn't like that very much.
> The second would be to freeze XFS from within the hibernation code path,
> using freeze_bdev().

The second is much more likely to work reliably. If freezing the
filesystem leaves something in an inconsistent state, then it's
something I can reproduce and debug without needing to
suspend/resume.

FWIW, don't forget you need to thaw the filesystem on resume.

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group
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