After restarting some 'ghost' docker containers on precise with the raring-lts kernel, the kernel locks up and shows:
[1095015.392057] BUG: soft lockup - CPU#0 stuck for 22s! [gunicorn:12804]
... (for each core)
Here is the original, more docker focused bug report: https://github.com/dotcloud/docker/issues/3873
I could reproduce this bug with various kernel versions. I've set the softlockup_panic=1 kernel parameter to get some stack traces. See this gist for stack trace for 3.5 and 3.8 kernels (will add 3.11 any minute): https://gist.github.com/discordianfish/7886354d9a19b2084775
It also contains a small script to reproduce this, although I couldn't reproduce it in a vagrant VM just our Dell R710 systems so far.
---
AlsaDevices:
total 0
crw-rw---T 1 root audio 116, 1 Feb 3 09:45 seq
crw-rw---T 1 root audio 116, 33 Feb 3 09:45 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: [Errno 2] No such file or directory
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=e8d3c6ec-f202-480c-ac43-52ffbbbcb393
IwConfig: Error: [Errno 2] No such file or directory
MachineType: Dell Inc. PowerEdge R710
MarkForUpload: True
Package: linux (not installed)
PciMultimedia:
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-35-generic root=/dev/mapper/ubuntu--vg-root ro console=tty0 console=ttyS1,115200 softlockup_panic=1
ProcVersionSignature: Ubuntu 3.8.0-35.52~precise1-generic 3.8.13.13
RelatedPackageVersions:
linux-restricted-modules-3.8.0-35-generic N/A
linux-backports-modules-3.8.0-35-generic N/A
linux-firmware 1.79.9
RfKill: Error: [Errno 2] No such file or directory
Tags: precise
Uname: Linux 3.8.0-35-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
dmi.bios.date: 07/24/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 6.3.0
dmi.board.name: 0YDJK3
dmi.board.vendor: Dell Inc.
dmi.board.version: A09
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr6.3.0:bd07/24/2012:svnDellInc.:pnPowerEdgeR710:pvr:rvnDellInc.:rn0YDJK3:rvrA09:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge R710
dmi.sys.vendor: Dell Inc.
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1275809
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.