linux-ext4 - Re: howto downgrade ext4 to ext3

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Message-ID: <20090918193456.GA27303@mit.edu>
Date:	Fri, 18 Sep 2009 15:34:56 -0400
From:	Theodore Tso <tytso@....edu>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	jehan procaccia <jehan.procaccia@...sudparis.eu>,
	linux-ext4@...r.kernel.org
Subject: Re: howto downgrade ext4 to ext3

On Fri, Sep 18, 2009 at 01:24:32PM -0500, Eric Sandeen wrote:
>
> Delalloc should be mostly ok in that kernel, but quota doesn't handle  
> it.  So dropping quota -or- dropping delalloc should suffice.
>
> OTOH, the -o nodelalloc paths have not gotten a lot of test coverage, so  
> caveats apply.

I haven't dont a -o delalloc test in a while, but at one point,
probably about 2-3 months ago, I did do a regression test run using
the xfsqa test suite with -o delalloc.  Of course, just because
mainline -o delalloc has been tested doesn't say that much about RHEL
5.4's -o delalloc --- there's a reason why it was labelled a
Technology Preview on RHEL 5.4.  :-)

						 - Ted
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