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

Bart Van Assche bvanassche at acm.org
Tue May 27 16:09:37 UTC 2014

On 05/27/14 16:49, Mike Snitzer wrote:
> 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

Hello Mike,

My test passes with that tree.



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