Bug#649722: "no space left on device" with btrfs and previously used compress=lzo option

[p.brochart@libertysurf.fr]

Hi,

I had the same problem with kernel 3.0.x and 3.1.x (no space left when I was
trying to update Kernel with apt-get).

Now, it's OK for me with Kernel 3.2.10 (LVM & Btrfs)