** Changed in: ubuntu-power-systems
Status: Incomplete => Fix Released
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https://bugs.launchpad.net/bugs/1734856
Title:
Can't boot VM with more than 16 disks (slof buffer issue)
Status in SLOF - Slimline Open Firmware:
New
Status in The Ubuntu-power-systems project:
Fix Released
Status in slof package in Ubuntu:
Fix Released
Status in slof source package in Xenial:
Fix Released
Status in slof source package in Zesty:
Fix Released
Status in slof source package in Artful:
Fix Released
Status in slof source package in Bionic:
Fix Released
Bug description:
[Impact]
* Booting a KVM guest with many disks considered as potential boot device
fails on ppc64le
* In detail this was an overflow, so now the processing of devices is
changed to use dynamic allocation which works with higher numbers of
devices.
[Test Case]
* Comment #12 has the full final testcase, not writing all that up
here again.
[Regression Potential]
* It is a change of disk processing in the slof loader for ppc64el
- that means on one hand only ppc64el will be affected by an issue
- OTOH there might be a disk combination not part of my or upstreams or
IBMs testing that might now fail with the new code (unlikely)
- Given that the change is upstream and was provided by IBM which I
consider the authority on that code I think it is safe to be
considered.
[Other Info]
* n/a
----
== Comment: #0 - RAHUL CHANDRAKAR <rahch...@in.ibm.com> - 2017-11-28 03:40:37
==
---Problem Description---
Can't boot VM with more than 16 disks.
It is an issue with qemu/SLOF (Bug: https://github.com/qemu/SLOF/issues/3)
and it was fixed by Nikunj Amritlal Dadhnia. He has made a patch available and
it has been tested by PowerVC team.
We need this fix in Ubuntu 16.04 and later releases.
Machine Type = 8348-21C (P8 Habanero)
---Steps to Reproduce---
Steps to recreate:
1. Create a VM
2. Attach 50 disks
3. Shutdown from OS
4. Start again and let it boot
---uname output---
Linux neo160.blr.stglabs.ibm.com 4.4.0-101-generic #124-Ubuntu SMP Fri Nov 10
18:29:11 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
---Debugger---
A debugger is not configured
Patch posted and awaiting response...
http://patchwork.ozlabs.org/patch/842011/
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