Comment 12 for bug 1730717

Revision history for this message
Iain Lane (laney) wrote : Re: [Bug 1730717] Re: Some VMs fail to reboot with "watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]"

On Wed, Nov 08, 2017 at 03:16:29PM -0000, Joseph Salisbury wrote:
> @Laney, thanks for testing the mainline kernel. It's promising that a
> fix might be in that kernel. The time consuming part will be
> identifying what commit in that kernel is the actual fix. We could
> perform a "Reverse" kernel bisect, which would required testing 12 or so
> test kernels. However, it sounds like to set up a reproducer is time
> consuming as well.
>
> The easiest thing to try next would be to test the latest upstream 4.13
> stable kernels. It's possible the fix that is in 4.14-rc8 was also cc'd
> to upstream stable and made it's way into 4.13 thorough the normal
> stable update process.
>
> If possible to test, the latest 4.13 upstream kernel is 4.13.12 and is available here:
> http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.12/

20 instances, all good.

Maybe I should try one that we think is 'bad' to confirm that the way
I'm doing this is actually capable of reproducing the issue? If you
think that's sensible, could you recommend me a kernel to try?

--
Iain Lane [ <email address hidden> ]
Debian Developer [ <email address hidden> ]
Ubuntu Developer [ <email address hidden> ]