Re: [kthread] 2e7d8748eb: last_state.is_incomplete_run

[Chen, Rong A]

Thanks for the input, we do detect this on this commit but not its parent.
It may be merged into a wrong base branch or something else that
we are not aware of. And it's kind difficulty now for us to provide a
reproduction step for kexec issue, we will consider this further.

Best Regards,
Rong Chen


On 8/27/2020 11:49 AM, qianli zhao wrote:
> I did not see any exceptions related to my changes,the corresponding
> macro CONFIG_DEBUG_OBJECTS_KTHREAD is not enabled,so i think the issue
> has nothing to do with my changes
>
> Thanks
>
> On Thu, 20 Aug 2020 at 14:26, kernel test robot <rong.a.chen@xxxxxxxxx> wrote:
> > Greeting,
> >
> > FYI, we noticed the following commit (built with gcc-9):
> >
> > commit: 2e7d8748eba7e32150cbd4f57129ea77d1255892 ("[RFC V2] kthread: add object debug support")
> > url: https://github.com/0day-ci/linux/commits/Qianli-Zhao/kthread-add-object-debug-support/20200812-131719
> > base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git fb893de323e2d39f7a1f6df425703a2edbdf56ea
> >
> > in testcase: boot
> >
> > on test machine: 8 threads Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16G memory
> >
> > caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> >
> >
> >
> > kernel boot failed by kexec:
> >
> > user  :notice:  [32m[  +0.371313]  [0m [33mLKP [0m: kexec loading...
> > user  :notice:  [32m[  +0.007118]  [0mkexec --noefi -l /opt/rootfs/tmp/pkg/linux/x86_64-rhel-8.3/gcc-9/2e7d8748eba7e32150cbd4f57129ea77d1255892/vmlinuz-5.8.0-12610-g2e7d8748eba7e --initrd=/opt/rootfs/tmp/initrd-concatenated
> >
> >
> >
> >
> > Thanks,
> > Rong Chen