cpu stuck for N seconds kernel bug in 3.13 to 3.15

[km]

ubuntu version 14.04
linux kernel version 3.13-0.29
What is expected: no kernel oops
What happened instead: kernel oops

This bug is non deterministic and manifests in 1 day or two to 10 days. This is observed especially with running processes of multithreaded java. The log shows cpu #N stuck for M seconds!

[Brad Figg (brad-figg)]

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

apport-collect 1343248

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.

[Joseph Salisbury (jsalisbury)]

Did this issue occur in a previous version of Ubuntu, or is this a new issue?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.16 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

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'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.16-rc6-utopic/

[km (srikrishnamohan)]

Unfortunately I am on a production machine and due to the server hanging
and becoming unresponsive, I had to reinstall ubuntu 12.10 server edition.
The problem does not appear in this 12.10

But then I found that this softlockup problem has been solved and the last
working kernel version that was reported to be working fine was 3.12.0-8

see
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1269404

Now
 http://www.spinics.net/lists/kernel/msg1716965.html
This is a patch that was believed to be solution to the problem. But in the
upstream kernels I do not see the patch applied.

So could this patch be applied upstream into 3.16 ?
Please let me know.

Krishna

On Thu, Jul 17, 2014 at 5:30 PM, Brad Figg <email address hidden> wrote:

> This bug is missing log files that will aid in diagnosing the problem.
> >From a terminal window please run:
>
> apport-collect 1343248
>
> 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
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1343248
>
> Title:
> cpu stuck for N seconds kernel bug in 3.13 to 3.15
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1343248/+subscriptions
>

[Launchpad Janitor (janitor)]

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