[Btrfs-users] btrfs v0.14: kernel BUG at /home/trey/btrfs-0.14/volumes.c:1453

[Chris Mason]

On Wednesday 30 April 2008, Gabor MICSKO wrote:
> On Wed, 2008-04-30 at 16:12 -0400, Chris Mason wrote:
> > On Wednesday 30 April 2008, Chris Mason wrote:
> > > On Wednesday 30 April 2008, Gabor MICSKO wrote:
> > > > Hi,
> > > >
> > > > Kernel crash when i tried to mount btrfs:
> > >
> > > I'm trying to reproduce this now, but are you sure you've updated to
> > > the latest btrfs-0.14 userland utilities as well?
>
> Yes, I double checked.

Ok, thank you.

>
> > I might have to ask you to make a disk image for me.
>
> Can you please tell me how to make?

Lets try a few things:

mkfs.btrfs /dev/cciss/c0d0p3
btrfsck /dev/cciss/c0d0p3

The btrfsck should complete without any errors.  If you get errors from 
btrfsck, it means mkfs.btrfs isn't creating a valid image.

Next:

# create a sparse file to hold the btrfs FS
dd if=/dev/zero of=image bs=1M seek=1000 count=1

# create an FS on the image
mkfs.btrfs image

# make a sparse aware tar file of the image
tar Scf image.tar image

sync

# verify you oops on mount with this image
mount -o loop -t btrfs image /mnt

Please send me image.tar, it should be very small.

-chris