[Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system
This should be fixed in Xenial/Yakkety by now. Unfortunately as part of the backport for bug #1567602 (fixed in 4.4.0-31.50 and later). ** Changed in: linux (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1588421 Title: linux: 4.6 kernel fails to boot on ppc64el multi-path system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1588421/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system
The same error appeared in 4.6.1 for amd64 . 4.6.0 works without problem. Matthew -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1588421 Title: linux: 4.6 kernel fails to boot on ppc64el multi-path system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1588421/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system
So I can confirm that above patch cherry picked into 4.6 allows to boot and configure multipath devices again (as long as there is not that UNIX=m thing in which case there won't be any disks to multipath on). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1588421 Title: linux: 4.6 kernel fails to boot on ppc64el multi-path system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1588421/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system
Or maybe not as 4.6 seems to fix that race. Though I found one change in the ALUA handler post 4.6 which modifies the handling of missing VPD identification (which leads to the "No device descriptors found" message): commit fe8b9534a0a0356f8a76467e2c561194bdb53c84 Author: Hannes Reinecke Date: Fri May 6 10:34:35 2016 +0200 scsi_dh_alua: do not fail for unknown VPD identification Not every device will return a useable VPD identification, but still might support ALUA. Rather than disable ALUA support we should be allowing the device identification to be empty and attach individual ALUA device handler to each devices. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1588421 Title: linux: 4.6 kernel fails to boot on ppc64el multi-path system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1588421/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system
Comparing that to the working 4.4 kernel it looks like device handler fails to receive valid data. The info should look like this: [1.653229] sd 0:2:0:0: alua: supports implicit TPGS [1.653395] sd 0:2:0:0: alua: port group c339 rel port c339 [1.653426] sd 0:2:0:0: alua: rtpg failed with 8070002 [1.653459] sd 0:2:0:0: alua: port group c339 state A preferred supports TOlUSNA [1.653616] sd 0:2:0:0: Attached scsi generic sg13 type 0 While the exact symptoms differ, this sounds a bit like there might be some relation to the device scan problems that are seen on zSeries (LP: #1567602). ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed ** Changed in: linux (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1588421 Title: linux: 4.6 kernel fails to boot on ppc64el multi-path system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1588421/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system
Initial data gathered: - The base disks seem present - The multipath modules, too (afaiks) dm_round_robin dm_multipath dm_round_robin scsi_dh_alua - Trying to manually create the multipath mappings fails somewhere related to the ALUA device handler. [ 526.285984] sd 0:2:0:0: alua: supports implicit TPGS [ 526.286088] sd 0:2:0:0: alua: No device descriptors found [ 526.286135] sd 0:2:0:0: alua: Attach failed (-22) [ 526.286192] device-mapper: table: 252:0: multipath: error attaching hardware handler -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1588421 Title: linux: 4.6 kernel fails to boot on ppc64el multi-path system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1588421/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
