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

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Message-Id: <200610242109.42301.rjw@sisk.pl>
Date:	Tue, 24 Oct 2006 21:09:41 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	David Chinner <dgc@....com>,
	Nigel Cunningham <ncunningham@...uxmail.org>,
	Andrew Morton <akpm@...l.org>,
	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>,
	xfs@....sgi.com
Subject: Re: [PATCH] Freeze bdevs when freezing processes.

On Tuesday, 24 October 2006 19:06, Christoph Hellwig wrote:
> On Tue, Oct 24, 2006 at 05:29:59PM +0200, Rafael J. Wysocki wrote:
> > Do you mean calling sys_sync() after the userspace has been frozen
> > may not be sufficient?
> 
> No, that's definitly not enough.  You need to freeze_bdev to make sure
> data is on disk in the place it's expected by the filesystem without
> starting a log recovery.

Thanks for the clarification.

Then it looks like we need the freezing of bdevs.  Pavel?


-- 
You never change things by fighting the existing reality.
		R. Buckminster Fuller
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