lxc guest fails to start with a kernel traceback

Bug #900378 reported by Andrew Glen-Young on 2011-12-05
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

After starting an AMD64 Oneiric instance (downloaded from uec-images.u.c 2011-11-29) using LXC as the nova-compute libvirt backend, I am occasionally seeing the instance fail to start and the kernel triggering a backtrace (attached).

There are no libvirtd logs for this instance, however I have also attached the relevant parts for the nova-compute.log from around the time this occurred. This looks like /dev/nbd15 may still be in use while being reassigned to a new instance.

System Information:
    Linux chandler 3.0.0-13-server #22-Ubuntu SMP Wed Nov 2 15:09:08 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
    Ubuntu 11.10 Oneiric

    HP ProLiant DL380 G6

Please let me know if you need any further information.

Andrew Glen-Young (aglenyoung) wrote :
Andrew Glen-Young (aglenyoung) wrote :
Chuck Short (zulcss) on 2011-12-05
affects: nova (Ubuntu) → linux (Ubuntu)

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 900378

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
tags: added: oneiric
Andrew Glen-Young (aglenyoung) wrote :

Attached log.

Changed in linux (Ubuntu):
status: Incomplete → Confirmed
Joseph Salisbury (jsalisbury) wrote :

Would it be possible for you to test the latest upstream kernel? It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . If possible, please test the latest v3.2-rcN kernel (Not a kernel in the daily directory). Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag(Only that one tag, please leave the other tags). This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text.

If this bug is fixed by the mainline kernel, please add the following tag 'kernel-fixed-upstream-KERNEL-VERSION'. For example, if kernel version 3.2-rc1 fixed and issue, the tag would be: 'kernel-fixed-upstream-v3.2-rc1'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. If you believe this bug does not require upstream testing, please add the tag: 'kernel-upstream-testing-not-needed'.

Thanks in advance.

Changed in linux (Ubuntu):
importance: Undecided → Medium
tags: added: needs-upstream-testing
tags: added: needs-kernel-logs
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