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

To: Pavel Machek <pavel@xxxxxx>
Subject: Re: [linux-lvm] 2.6.22-rc4 XFS fails after hibernate/resume
From: "Rafael J. Wysocki" <rjw@xxxxxxx>
Date: Thu, 28 Jun 2007 17:27:34 +0200
Cc: David Chinner <dgc@xxxxxxx>, David Greaves <david@xxxxxxxxxxxx>, David Robinson <zxvdr.au@xxxxxxxxx>, LVM general discussion and development <linux-lvm@xxxxxxxxxx>, "'linux-kernel@xxxxxxxxxxxxxxx'" <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx, linux-pm <linux-pm@xxxxxxxxxxxxxx>, LinuxRaid <linux-raid@xxxxxxxxxxxxxxx>
In-reply-to: <20070627204924.GA4777@ucw.cz>
References: <46744065.6060605@dgreaves.com> <20070618145007.GE85884050@sgi.com> <20070627204924.GA4777@ucw.cz>
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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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