linux-kernel - Re: [PATCH 3/5] fsfreeze: freeze_super and thaw

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Message-ID: <20100614152219.GC32354@infradead.org>
Date:	Mon, 14 Jun 2010 11:22:19 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Dave Chinner <david@...morbit.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	viro@...IV.linux.org.uk, josef@...hat.com, jeffmerkey@...il.com
Subject: Re: [PATCH 3/5] fsfreeze: freeze_super and thaw_bdev don't play well
 together

This breaks the "feature" that we can freeze a block device that doesn't
have a filesystem mounted yet.  For filesystems using get_sb_bdev that
prevents a new filesystem to be mounted on them.

I'm not sure it's a particularly useful feature, but it's been there
since day 1 of the freeze support.  The easiest way to not break it
would be to keep the per-sb freeze count only for that case and only
check it during mount.
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