From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: Re: Regression in 3.15 on POWER8 with multipath SCSI Date: Tue, 01 Jul 2014 07:57:55 +0200 Message-ID: <53B24DE3.9050108@suse.de> References: <20140630103058.GA17747@iris.ozlabs.ibm.com> <53B1416D.8020305@suse.de> <20140630110202.GB17747@iris.ozlabs.ibm.com> <53B14B78.4010500@suse.de> <20140630212801.GB20819@iris.ozlabs.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20140630212801.GB20819@iris.ozlabs.ibm.com> Sender: linux-kernel-owner@vger.kernel.org To: Paul Mackerras Cc: dm-devel@redhat.com, linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, Vladimir Davydov , Linus Torvalds , Andrew Morton , Kay Sievers List-Id: dm-devel.ids On 06/30/2014 11:28 PM, Paul Mackerras wrote: > On Mon, Jun 30, 2014 at 01:35:20PM +0200, Hannes Reinecke wrote: >> On 06/30/2014 01:02 PM, Paul Mackerras wrote: [ .. ] >>> >>> No, I'm not using LVM, and in fact I deleted all the physical volum= es >>> that were on any of the disks (they were installations of other >>> distros), so there are no physical or logical volumes anywhere on a= ny >>> disk. I haven't tried disabling the LVM service completely, though= =2E >>> What would it mean if disabling the LVM service made a difference? >>> >> Yes. LVM integration with systemd is a science unto itself. >> I'm reasonably confident with multipath, but not LVM. >> Plus the fact the the LVM service apparently is waiting for somethin= g sort >> of points into that direction. >> >> So please do disable the lvm service. > > I disabled the LVM service, and it's still bad. Unmodified 3.15 > booted successfully in only 18 out of 50 attempts with LVM disabled. > > So it's not LVM. In any case LVM was fine with a 3.14 kernel. > Right, that was just a cross-check to eliminate any variables. I'll be checking here at my end. Cheers, Hannes --=20 Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 N=FCrnberg GF: J. Hawn, J. Guild, F. Imend=F6rffer, HRB 16746 (AG N=FCrnberg) From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 046901A0044 for ; Tue, 1 Jul 2014 15:58:02 +1000 (EST) Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) (using TLSv1 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 881E11400E1 for ; Tue, 1 Jul 2014 15:58:01 +1000 (EST) Message-ID: <53B24DE3.9050108@suse.de> Date: Tue, 01 Jul 2014 07:57:55 +0200 From: Hannes Reinecke MIME-Version: 1.0 To: Paul Mackerras Subject: Re: Regression in 3.15 on POWER8 with multipath SCSI References: <20140630103058.GA17747@iris.ozlabs.ibm.com> <53B1416D.8020305@suse.de> <20140630110202.GB17747@iris.ozlabs.ibm.com> <53B14B78.4010500@suse.de> <20140630212801.GB20819@iris.ozlabs.ibm.com> In-Reply-To: <20140630212801.GB20819@iris.ozlabs.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: Vladimir Davydov , Kay Sievers , linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, dm-devel@redhat.com, Andrew Morton , Linus Torvalds List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 06/30/2014 11:28 PM, Paul Mackerras wrote: > On Mon, Jun 30, 2014 at 01:35:20PM +0200, Hannes Reinecke wrote: >> On 06/30/2014 01:02 PM, Paul Mackerras wrote: [ .. ] >>> >>> No, I'm not using LVM, and in fact I deleted all the physical volumes >>> that were on any of the disks (they were installations of other >>> distros), so there are no physical or logical volumes anywhere on any >>> disk. I haven't tried disabling the LVM service completely, though. >>> What would it mean if disabling the LVM service made a difference? >>> >> Yes. LVM integration with systemd is a science unto itself. >> I'm reasonably confident with multipath, but not LVM. >> Plus the fact the the LVM service apparently is waiting for something sort >> of points into that direction. >> >> So please do disable the lvm service. > > I disabled the LVM service, and it's still bad. Unmodified 3.15 > booted successfully in only 18 out of 50 attempts with LVM disabled. > > So it's not LVM. In any case LVM was fine with a 3.14 kernel. > Right, that was just a cross-check to eliminate any variables. I'll be checking here at my end. Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)