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

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Message-Id: <200706281727.35430.rjw@sisk.pl>
Date:	Thu, 28 Jun 2007 17:27:34 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>
Cc:	David Chinner <dgc@....com>, David Greaves <david@...eaves.com>,
	David Robinson <zxvdr.au@...il.com>,
	LVM general discussion and development 
	<linux-lvm@...hat.com>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	xfs@....sgi.com, linux-pm <linux-pm@...ts.osdl.org>,
	LinuxRaid <linux-raid@...r.kernel.org>
Subject: Re: [linux-lvm] 2.6.22-rc4 XFS fails after hibernate/resume

On Wednesday, 27 June 2007 22:49, Pavel Machek wrote:
> Hi!
> 
> > FWIW, I'm on record stating that "sync" is not sufficient to quiesce an XFS
> > filesystem for a suspend/resume to work safely and have argued that the only
> 
> Hmm, so XFS writes to disk even when its threads are frozen?
> 
> > safe thing to do is freeze the filesystem before suspend and thaw it after
> > resume. This is why I originally asked you to test that with the other problem
> 
> Could you add that to the XFS threads if it is really required? They
> do know that they are being frozen for suspend.

Well, do you remember the workqueues?  They are still nonfreezable.

Greetings,
Rafael


-- 
"Premature optimization is the root of all evil." - Donald Knuth
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