From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Snitzer Subject: Re: 3.15-rc4: circular locking dependency triggered by dm-multipath Date: Tue, 27 May 2014 10:49:29 -0400 Message-ID: <20140527144929.GA11410@redhat.com> References: <5368ABE8.9050909@acm.org> <536B1CC1.6080709@suse.de> <53832919.8080500@acm.org> <53832F2B.9060808@suse.de> <53833183.7080106@acm.org> <538333AC.60103@suse.de> <53833730.50509@suse.de> <538338D5.4080804@suse.de> <538355B3.9060100@acm.org> <20140527132228.GA10955@redhat.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20140527132228.GA10955@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Bart Van Assche Cc: dm-devel@redhat.com List-Id: dm-devel.ids On Tue, May 27 2014 at 9:22am -0400, Mike Snitzer wrote: > On Mon, May 26 2014 at 10:54am -0400, > Bart Van Assche 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