Kernel-3.1 Crash

[Jeff Moyer]

Don Zickus <dzickus at redhat.com> writes:

> On Thu, Oct 27, 2011 at 06:59:12PM +0200, Antonio Trande wrote:
>> The digital picture are here:
>> http://sagitter.fedorapeople.org/kernel-boot.tar.gz
>
> According to our DM guys this fix just missed 3.1
>
> http://git.kernel.dk/?p=linux-block.git;a=commit;h=f26d8f0562da76731cb049943a0e9d9fa81d946a
> http://git.kernel.dk/?p=linux-block.git;a=commit;h=8f02b3a09b1b7d2a4d24b8cd7008f2a441f19a14
>
> I cc'd Jeff Moyer he knows about it.  The DM folks assume that you are
> using multipath (as that is the only way you can hit this bug from their
> point of view).

This doesn't look like the same problem.  Here we've got BUG: scheduling
while atomic.  If it was the bug fixed by the above commits, then you
would hit a BUG_ON.  I would start looking at the btrfs bits to see if
they're holding any locks in this code path.

Cheers,
Jeff