Re: kernel BUG at fs/btrfs/inode.c:149!

[Josef Bacik <josef@redhat.com>]

On 05/04/2011 10:26 AM, whirm@gmx.com wrote:
> Hi all,
>
> Here's a traceback from a failed attempt to mount a btrfs in lvm in luks
> filesystem.
>
> Note that if I mount it readonly it mounts successfully (haven't tried to
> recover any data as I have recent backups).
>
> Yesterday I defragmented both / and /home with:
>
> find /home -xdev -type f -print0 | xargs -0 sudo ./btrfs filesystem defragment
> -c
>
> with btrfs-tools v0.19-35-g1b444cd and rebooted a couple of times. And today I
> got this traceback while trying to mount home at boot time (/ is working ok)
>
> btrfsck fails with the following error:
>
> couldn't open because of unsupported option features (8).
> btrfsck: disk-io.c:682: open_ctree_fd: Assertion `!(1)' failed.
>
> I'm using a 2.6.39-rc5+ kernel from Linus' tree.
>
> If someone needs any extra info, just ask for it, Ill keep the corrupted
> filesystem for a few days before destroying it.
>
> Thanks.
>

I just posted a patch for this, please try

[PATCH] Btrfs: fix how we do space reservation for truncate

thanks,

Josef