From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Snitzer Subject: Re: dm-multipath test scripts Date: Sat, 20 Feb 2016 01:12:47 -0500 Message-ID: <20160220061247.GA23333@redhat.com> References: <20151007053923.GA10749@xzibit.linux.bs1.fc.nec.co.jp> <20160218171745.GA15071@redhat.com> <56C662F1.8070407@ce.jp.nec.com> <56C6D45A.6060407@ce.jp.nec.com> <20160219194216.GB21133@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mx1.redhat.com ([209.132.183.28]:45402 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757941AbcBTGMt (ORCPT ); Sat, 20 Feb 2016 01:12:49 -0500 Content-Disposition: inline In-Reply-To: <20160219194216.GB21133@redhat.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Junichi Nomura Cc: device-mapper development , linux-scsi On Fri, Feb 19 2016 at 2:42pm -0500, Mike Snitzer wrote: > On Fri, Feb 19 2016 at 3:37am -0500, > Junichi Nomura wrote: > > > On 02/19/16 09:33, Nomura Junichi wrote: > > > On 02/19/16 02:17, Mike Snitzer wrote: > > >> What is the last kernel version that your scripts have worked on? > > > > > > v4.4 worked fine. I'll check with v4.5-rc4 when I get a machine. > > > > v4.5-rc4 works fine, too. > > Have you been running with blk-mq? > Either by setting CONFIG_DM_MQ_DEFAULT or: > echo Y > /sys/module/dm_mod/parameters/use_blk_mq > > I'm seeing test_02_sdev_delete fail with blk-mq enabled. I only see failure if I stack dm-mq ontop of old non-mq scsi devices with: echo N > /sys/module/scsi_mod/parameters/use_blk_mq echo Y > /sys/module/dm_mod/parameters/use_blk_mq If I use scsi-mq for the underlying devices all works fine (been testing the latest dm-4.6 branch though, I'll go back and try stock 4.5-rc4 just to double check). But this makes me think the novelty of having dm-mq support stacking on non-blk-mq devices was misplaced. It is a senseless config. I'll probably remove support for such stacking soon (next week).