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

[Mike Snitzer]

On Tue, May 06 2014 at  5:31am -0400,
Bart Van Assche <bvanassche at acm.org> wrote:

> Hello,
> 
> Has anyone else perhaps already run into this ?

Not seen this, how easily is it reproduced?

These recent commits are clearly the issue:

e809917735e dm mpath: push back requests instead of queueing
3e9f1be1b40 dm mpath: remove process_queued_ios()

Need to take a closer look at the lockdep splat you provided.