[Kernel-packages] [Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system

2016-07-20 Thread Stefan Bader 
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

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Title:
  linux: 4.6 kernel fails to boot on ppc64el multi-path system

Status in linux package in Ubuntu:
  Fix Released

Bug description:
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-extra-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb

  Provisioned modoc (ppc64el) with stock Xenial, then installed the
  above kernel. It eventually times out attempting to mount rootfs and
  drops to the busybox prompt.

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[Kernel-packages] [Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system

2016-06-03 Thread Matthew Shapiro 
The same error appeared in 4.6.1 for amd64 . 4.6.0 works without problem.
Matthew

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Title:
  linux: 4.6 kernel fails to boot on ppc64el multi-path system

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-extra-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb

  Provisioned modoc (ppc64el) with stock Xenial, then installed the
  above kernel. It eventually times out attempting to mount rootfs and
  drops to the busybox prompt.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system

2016-06-03 Thread Stefan Bader 
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).

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Title:
  linux: 4.6 kernel fails to boot on ppc64el multi-path system

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-extra-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb

  Provisioned modoc (ppc64el) with stock Xenial, then installed the
  above kernel. It eventually times out attempting to mount rootfs and
  drops to the busybox prompt.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system

2016-06-03 Thread Stefan Bader 
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.

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Title:
  linux: 4.6 kernel fails to boot on ppc64el multi-path system

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-extra-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb

  Provisioned modoc (ppc64el) with stock Xenial, then installed the
  above kernel. It eventually times out attempting to mount rootfs and
  drops to the busybox prompt.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system

2016-06-03 Thread Stefan Bader 
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

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You received this bug notification because you are a member of Kernel
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Title:
  linux: 4.6 kernel fails to boot on ppc64el multi-path system

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-extra-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb

  Provisioned modoc (ppc64el) with stock Xenial, then installed the
  above kernel. It eventually times out attempting to mount rootfs and
  drops to the busybox prompt.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1588421] Re: linux: 4.6 kernel fails to boot on ppc64el multi-path system

2016-06-03 Thread Stefan Bader 
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

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Title:
  linux: 4.6 kernel fails to boot on ppc64el multi-path system

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb
  
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9759880/+files/linux-image-extra-4.6.0-6-generic_4.6.0-6.7_ppc64el.deb

  Provisioned modoc (ppc64el) with stock Xenial, then installed the
  above kernel. It eventually times out attempting to mount rootfs and
  drops to the busybox prompt.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1588421/+subscriptions

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