linux-kernel - Re: [PATCH 2.6.19 5/5] fs: freeze

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Message-ID: <20061110005436.GN8394166@melbourne.sgi.com>
Date:	Fri, 10 Nov 2006 11:54:36 +1100
From:	David Chinner <dgc@....com>
To:	Pavel Machek <pavel@....cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Alasdair G Kergon <agk@...hat.com>,
	Eric Sandeen <sandeen@...hat.com>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, Srinivasa DS <srinivasa@...ibm.com>,
	Nigel Cunningham <nigel@...pend2.net>,
	David Chinner <dgc@....com>
Subject: Re: [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex

On Thu, Nov 09, 2006 at 10:17:22PM +0100, Pavel Machek wrote:
> Why not simply &~ PF_NOFREEZE on that particular process? Filesystems
> are free to use threads/work queues/whatever, but refrigerator should
> mean "no writes to filesystem" for them...

Freezing the filesytem is the way to tell the filesystem "no more
writes to the filesytem".

Cheers,

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