From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurence Oberman Subject: Re: [PATCH v3 0/5] Reduce RDMA RW API SGE limit Date: Wed, 20 Jul 2016 11:19:36 -0400 (EDT) Message-ID: <88756403.5866837.1469027976552.JavaMail.zimbra@redhat.com> References: <8fb358c3-3504-02ca-fcb8-1624f28be1b0@sandisk.com> <1465736110.5730453.1468948485702.JavaMail.zimbra@redhat.com> <93123318.5861700.1469025833903.JavaMail.zimbra@redhat.com> <8b8d2e22-4fb9-466f-5321-0745748bd793@sandisk.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <8b8d2e22-4fb9-466f-5321-0745748bd793-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Bart Van Assche Cc: Doug Ledford , Christoph Hellwig , Sagi Grimberg , Steve Wise , Parav Pandit , "Nicholas A. Bellinger" , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org ----- Original Message ----- > From: "Bart Van Assche" > To: "Laurence Oberman" > Cc: "Doug Ledford" , "Christoph Hellwig" , "Sagi Grimberg" , > "Steve Wise" , "Parav Pandit" , "Nicholas A. Bellinger" > , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > Sent: Wednesday, July 20, 2016 11:07:34 AM > Subject: Re: [PATCH v3 0/5] Reduce RDMA RW API SGE limit > > On 07/20/2016 07:43 AM, Laurence Oberman wrote: > > [ ... ] > > I am not sure yet if something in the 4.7.0-rc7 base changed ALUA > > behavior, likely that is the case. > > I have to go back and check. > > > > On an older kernel with recent patches from you and Leon everything looks > > fine and is working fine. > > > > 4.7.0-rc1.bartleon+ > > > > 360001ff0b035d000000000098d79000a dm-11 DDN ,SFA14K > > size=29T features='1 queue_if_no_path' hwhandler='0' wp=rw > > |-+- policy='round-robin 0' prio=90 status=active > > | `- 1:0:0:9 sdt 65:48 active ready running > > `-+- policy='round-robin 0' prio=50 status=enabled > > `- 2:0:0:9 sdv 65:80 active ready running > > 360001ff0b035d000000000078d770008 dm-9 DDN ,SFA14K > > size=29T features='1 queue_if_no_path' hwhandler='0' wp=rw > > |-+- policy='round-robin 0' prio=90 status=active > > | `- 2:0:0:7 sds 65:32 active ready running > > `-+- policy='round-robin 0' prio=50 status=enabled > > `- 1:0:0:7 sdp 8:240 active ready running > > Hello Laurence, > > Can you check your /etc/multipath.conf? In the multipath -ll output > "hwhandler" should be something like hwhandler='1 alua' instead of '0' > when communicating with an array that supports ALUA. > > Thanks, > > Bart. > Hi Bart I have not changed my multipath.conf and the older kernel works fine. Its been the same configuration all along. I have had this all along (came from the vendor) and its also on the other server booting the older kernel. device { vendor "DDN" product "SFA14K" path_grouping_policy group_by_prio prio alua path_selector "round-robin 0" path_checker tur failback 2 rr_weight uniform no_path_retry 12 dev_loss_tmo 10 fast_io_fail_tmo 5 } Older kernel is coming up ALUA 360001ff0b035d000000000078d770008 dm-9 DDN ,SFA14K size=29T features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=90 status=active Active/optimized | `- 2:0:0:7 sds 65:32 active ready running `-+- policy='round-robin 0' prio=50 status=enabled Active/non-optimized `- 1:0:0:7 sdp 8:240 active ready running New kernel with latest patches 360001ff0b035d000000000078d770008 dm-12 DDN ,SFA14K size=29T features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=10 status=active |- 1:0:0:7 sdj 8:144 active ready running `- 2:0:0:7 sday 67:32 active ready running I dont think its your recent 5 patches, but I will test the latest kernel without them to validate that its not your changes. Let me go ahead and test the generic 4.7.0-rc7 and confirm. Thanks!! Laurence -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html