From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: Re: Revert "dm mpath: remove unnecessary NVMe branching in favor of scsi_dh checks" Date: Mon, 12 Mar 2018 21:32:39 +0000 Message-ID: <1520890358.3469.68.camel@wdc.com> References: <20180312202808.3556-1-bart.vanassche@wdc.com> <20180312212314.GA30763@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20180312212314.GA30763@redhat.com> Content-Language: en-US Content-ID: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: "snitzer@redhat.com" Cc: "dm-devel@redhat.com" List-Id: dm-devel.ids On Mon, 2018-03-12 at 17:23 -0400, Mike Snitzer wrote: > Could you provide more details on your setup? > > Obviously you're using "queue_mode mq", what are your underlying paths? > > Given the trace it would seem you're hitting multipath_clone_and_map()'s > blk_queue_dying(q) error path that calls activate_or_offline_path(). Hello Mike, The reported kernel crash was triggered by running the following command: srp-test/run_tests -c -d -r 10 -t 02-mq The srp-test software is available at https://github.com/bvanassche/srp-test. All patches necessary to run that script in a virtual machine (RoCE support for the SRP initiator and target drivers) will be sent to Linus during the kernel v4.17 merge window. These patches are already available in linux-next today. Although I have not tried this myself, I expect that if you run the above command against a kernel built from the linux-next code that that will allow you to reproduce what I reported. Thanks, Bart.