Triaged and assigned to me for the multipath-tools and d-i work. I've
notified the kernel team on IRC as well since I'll need to have
multipath-modules-udeb containing dm-queue-length before I can apply the
changes there. Then we can SRU the whole thing as well.
** Also affects: hw-detect (Ubuntu)
Importance: Undecided
Status: New
** Changed in: hw-detect (Ubuntu)
Importance: Undecided => Critical
** Changed in: hw-detect (Ubuntu)
Status: New => Triaged
** Changed in: hw-detect (Ubuntu)
Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)
** Changed in: hw-detect (Ubuntu)
Milestone: None => ubuntu-17.03
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https://bugs.launchpad.net/bugs/1673350
Title:
dm-queue-length module is not included in installer/initramfs
Status in hw-detect package in Ubuntu:
Triaged
Status in initramfs-tools package in Ubuntu:
Triaged
Status in linux package in Ubuntu:
Triaged
Status in multipath-tools package in Ubuntu:
Triaged
Status in hw-detect source package in Xenial:
New
Status in initramfs-tools source package in Xenial:
New
Status in linux source package in Xenial:
New
Status in multipath-tools source package in Xenial:
New
Bug description:
---Problem Description---
dm-queue-length module is not included in installer/initramfs
On Ubuntu, multipath devices using the 'queue-length' path selector
are non-functional on both the installer and initramfs environments;
because the 'dm-queue-length' kernel module is not included in them.
The multipath-modules.udeb (src:linux) does not include it in the installer,
nor multipath-tools-boot (src:multipath-tools) installs it in the initramfs.
One example is the EMC XtremIO storage, which has 'queue-length' defined as
its path selector in the default multipath configuration, at least on 16.04.
Other products may be affected if they are manually configured to use that
path selector (e.g., via /etc/multipath.conf), and the mere switch of that
might render the system _unbootable_ if booting from multipath, since the
initramfs is affected.
More recently this and another storage changed default path selectors out
of 'queue-length', however, it's virtually possible for any storage system
to be affected, with the described manual configuration change. So, this
change is also desired on for the next stable release, 17.04, and later.
Patches are provided for 16.04 and 17.04.
Error logs in LP comment #6.
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