linux-kernel - Re: [PATCH] Freeze bdevs when freezing processes.

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Message-ID: <20061024213737.GD5662@elf.ucw.cz>
Date:	Tue, 24 Oct 2006 23:37:37 +0200
From:	Pavel Machek <pavel@....cz>
To:	David Chinner <dgc@....com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Nigel Cunningham <ncunningham@...uxmail.org>,
	Andrew Morton <akpm@...l.org>,
	LKML <linux-kernel@...r.kernel.org>, xfs@....sgi.com
Subject: Re: [PATCH] Freeze bdevs when freezing processes.

Hi!

> > Do you mean calling sys_sync() after the userspace has been frozen
> > may not be sufficient?
> 
> In most cases it probably is, but sys_sync() doesn't provide any
> guarantees that the filesystem is not being used or written to after
> it completes. Given that every so often I hear about an XFS filesystem
> that was corrupted by suspend, I don't think this is sufficient...

Userspace is frozen. There's noone that can write to the XFS
filesystem.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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