From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Snitzer Subject: Re: dm-multipath: Accept failed paths for multipath maps Date: Tue, 18 Feb 2014 20:14:02 -0500 Message-ID: <20140219011401.GA17796@redhat.com> References: <1387353155-7271-1-git-send-email-hare@suse.de> <20131218140858.GC17730@redhat.com> <52B1B046.3040301@suse.de> <1387380498.7608.6.camel@ict-vth-stewarts01.ict.englab.netapp.com> <52B2AC96.8010909@acm.org> 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: <52B2AC96.8010909@acm.org> 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: device-mapper development , "Stewart, Sean" , Alasdair Kergon List-Id: dm-devel.ids On Thu, Dec 19 2013 at 3:21am -0500, Bart Van Assche wrote: > On 12/18/13 16:28, Stewart, Sean wrote: > > The most severe case is with > > InfiniBand, where the LLD may place a device offline, then every single > > reload that is trying to add a good path in will fail. I will qualify > > this by saying that I realize it is a problem that the device gets > > placed offline in the first place, but this patch would allow it a > > chance to continue on. The user still has to take manual steps to fix > > the problem in this case, but it seems less disruptive to applications. > > Are you perhaps referring to the SRP initiator ? The above is correct > for old versions of the SRP initiator (< Linux kernel 3.12) but no > longer for upstream kernel versions >= 3.12. An effort is ongoing to > backport the latest SRP initiator changes into RHEL and SLES. Hi Bart, It has been a while. Where do things stand for the RHEL backport of these SRP initiator changes? Are we talking RHEL6 and RHEL7? Who at Red Hat is your contact for this work? Regardless of whether some version of Hannes's patch is applied to upstream dm-mpath: I'd really like to see this offlining problem that forced the need for this dm-mpath change addressed.