Re: [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU
On Sun, Aug 2, 2020 at 1:58 PM Greg Kroah-Hartman wrote: > On Sun, Aug 02, 2020 at 01:50:29PM +0300, Andy Shevchenko wrote: > > On Sun, Aug 2, 2020 at 8:54 AM kernel test robot wrote: ... > > > If you fix the issue, kindly add following tag > > > Reported-by: kernel test robot > > > > Thanks for the report. I didn't see it on real hardware though. Maybe > > because of timing (race?) differences. > > > > Greg, I think the best is to revert the change until I will have better one. > > Can you send me a revert patch with the reported-by: set up? Done. -- With Best Regards, Andy Shevchenko
Re: [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU
On Sun, Aug 02, 2020 at 01:50:29PM +0300, Andy Shevchenko wrote:
> On Sun, Aug 2, 2020 at 8:54 AM kernel test robot wrote:
> >
> > Greeting,
> >
> > FYI, we noticed the following commit (built with gcc-9):
> >
> > commit: 679193b7baf8d88e41cbeb397ca17f797654947d ("serial: 8250: Let serial
> > core initialise spin lock")
> > https://git.kernel.org/cgit/linux/kernel/git/gregkh/tty.git tty-next
> >
> >
> > in testcase: boot
> >
> > on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m
> > 16G
> >
> > caused below changes (please refer to attached dmesg/kmsg for entire
> > log/backtrace):
> >
> >
> > +---+++
> > | | f3af1b68fc | 679193b7ba |
> > +---+++
> > | boot_successes| 4 | 0 |
> > | boot_failures | 0 | 4 |
> > | BUG:spinlock_bad_magic_on_CPU | 0 | 4 |
> > +---+++
> >
> >
> > If you fix the issue, kindly add following tag
> > Reported-by: kernel test robot
>
> Thanks for the report. I didn't see it on real hardware though. Maybe
> because of timing (race?) differences.
>
> Greg, I think the best is to revert the change until I will have better one.
Can you send me a revert patch with the reported-by: set up?
thanks,
greg k-h
Re: [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU
On Sun, Aug 2, 2020 at 8:54 AM kernel test robot wrote:
>
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: 679193b7baf8d88e41cbeb397ca17f797654947d ("serial: 8250: Let serial
> core initialise spin lock")
> https://git.kernel.org/cgit/linux/kernel/git/gregkh/tty.git tty-next
>
>
> in testcase: boot
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
>
> caused below changes (please refer to attached dmesg/kmsg for entire
> log/backtrace):
>
>
> +---+++
> | | f3af1b68fc | 679193b7ba |
> +---+++
> | boot_successes| 4 | 0 |
> | boot_failures | 0 | 4 |
> | BUG:spinlock_bad_magic_on_CPU | 0 | 4 |
> +---+++
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot
Thanks for the report. I didn't see it on real hardware though. Maybe
because of timing (race?) differences.
Greg, I think the best is to revert the change until I will have better one.
--
With Best Regards,
Andy Shevchenko
