This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1746860
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: trusty
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https://bugs.launchpad.net/bugs/1746860
Title:
CPU Soft Lockup Causing Trusty (4.4.0-111-generic) to become
unresponsive
Status in linux package in Ubuntu:
Incomplete
Bug description:
1) The release of Ubuntu you are using, via 'lsb_release -rd' or System ->
About Ubuntu
Description: Ubuntu 14.04.5 LTS
Release: 14.04
2) The version of the package you are using, via 'apt-cache policy pkgname'
or by checking in Software Center
Ubuntu 4.4.0-111.134~14.04.1-generic 4.4.98
qemu-system 2.0.0+dfsg-2ubuntu1.36
3) What you expected to happen
The system should not have crashed
4) What happened instead
The system crashed and reported CPU soft lockup errors.
Hi,
we had a system lock up completely today, we noticed the following in the
logs:
[84070301.087602] BUG: soft lockup - CPU#1 stuck for 23s!
[qemu-system-x86:30908]
[84070301.271530] BUG: soft lockup - CPU#8 stuck for 22s! [khugepaged:238]
[84070314.314615] INFO: rcu_sched detected stalls on CPUs/tasks: { 0}
(detected by 19, t=150024 jiffies, g=8647354832, c=8647354831, q=0)
[84070341.072534] BUG: soft lockup - CPU#1 stuck for 22s!
[qemu-system-x86:30908]
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