[dm-devel] 3.15-rc4: circular locking dependency triggered by dm-multipath

[Mike Snitzer]

On Tue, May 27 2014 at  9:22am -0400,
Mike Snitzer <snitzer at redhat.com> wrote:

> On Mon, May 26 2014 at 10:54am -0400,
> Bart Van Assche <bvanassche at acm.org> wrote:
> 
> > Anyway,
> > I ran a test with v3.15-rc7 + your patch + 4cdd2ad780 reverted and that
> > test ran fine. I didn't encounter any lockups nor any lockdep
> > complaints. The test I ran was to run a fio I/O verification test on top
> > of a dm-multipath device. That multipath device was created on top of
> > several SCSI device nodes created by the ib_srp driver. About once every
> > 30 seconds a cable removal / reinsertion was simulated via the
> > ibportstate command.
> 
> Great, thanks.  I'll try to get this queued for Linus this week.

Done, please see:
https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=for-linus&id=63d832c30142cdceb478b1cac7d943d83b95b2dc