BTRFS concerns (was: Re: Plan for tomorrow's FESCo meeting (2011-06-01))

Richard W.M. Jones rjones at
Thu Jun 2 15:46:00 UTC 2011

On Wed, Jun 01, 2011 at 04:15:59PM +0100, Peter Robinson wrote:
> I will be unable to attend tomorrow but I have concerns of making btrfs
> default without a well tested fsck. I'm aware one is due soon but I don't
> believe 3-4 months is enough time to test it well enough. On 2.6.38.x I
> still get regular kernel abrt crashes on resume. Is it even marked stable in
> the upstream kernel yet?

Another concern is whether btrfs is going to work well to store
virtual machine disk images (ie. to replace LVM for that purpose,
where LVM is known to work very efficiently).

Last time I looked -- which I admit was a really long time ago -- it
behaved fairly pathologically with these huge monolithic files that
are rewritten in-place.

(Edit: just noticed this bug: )


Richard Jones, Virtualization Group, Red Hat
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