XFS bad inode magic/vsn daddr 64 #8 (magic=5858)

[Christoph Hellwig]

On Wed, Oct 20, 2010 at 07:24:09PM +1100, Nick Piggin wrote:
> Hi, I keep hitting this bug running xfstests, and managed to
> reproduce it several times on current vanilla upstream kernel
> too, below is one trace.
> 
> Nothing special about the xfstests run, except that it is run
> on brd device for both the test and the scratch mounts. No
> special mount options or mkfs flags. It seems pretty reproducable
> though, triggering every time I've run the tests like this.
> 
> I didn't narrow down the test that causes the bug because it
> keeps running other tests and then eventually hanging. Any hints
> to narrow it down?

Care to check if it goes away if you remove the special casing of
BLKFLSBUF in brd_ioctl?