** Description changed: + [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 <[email protected]> - 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) - + + Machine Type = 8348-21C (P8 Habanero) + ---Steps to Reproduce--- - Steps to recreate: + 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/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1734856 Title: Can't boot VM with more than 16 disks (slof buffer issue) To manage notifications about this bug go to: https://bugs.launchpad.net/slof/+bug/1734856/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
