* Re: [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU
[not found] <20200802054852.GR23458@shao2-debian>
@ 2020-08-02 10:50 ` Andy Shevchenko
2020-08-02 10:58 ` Greg Kroah-Hartman
0 siblings, 1 reply; 3+ messages in thread
From: Andy Shevchenko @ 2020-08-02 10:50 UTC (permalink / raw)
To: kernel test robot
Cc: Andy Shevchenko, Greg Kroah-Hartman, LKML, open list:SERIAL DRIVERS, lkp
On Sun, Aug 2, 2020 at 8:54 AM kernel test robot <lkp@intel.com> 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 <lkp@intel.com>
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU
2020-08-02 10:50 ` [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU Andy Shevchenko
@ 2020-08-02 10:58 ` Greg Kroah-Hartman
2020-08-02 11:16 ` Andy Shevchenko
0 siblings, 1 reply; 3+ messages in thread
From: Greg Kroah-Hartman @ 2020-08-02 10:58 UTC (permalink / raw)
To: Andy Shevchenko
Cc: kernel test robot, Andy Shevchenko, LKML, open list:SERIAL DRIVERS, lkp
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 <lkp@intel.com> 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 <lkp@intel.com>
>
> 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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU
2020-08-02 10:58 ` Greg Kroah-Hartman
@ 2020-08-02 11:16 ` Andy Shevchenko
0 siblings, 0 replies; 3+ messages in thread
From: Andy Shevchenko @ 2020-08-02 11:16 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: kernel test robot, Andy Shevchenko, LKML, open list:SERIAL DRIVERS, lkp
On Sun, Aug 2, 2020 at 1:58 PM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> 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 <lkp@intel.com> wrote:
...
> > > If you fix the issue, kindly add following tag
> > > Reported-by: kernel test robot <lkp@intel.com>
> >
> > 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
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-08-02 10:50 ` [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU Andy Shevchenko
2020-08-02 10:58 ` Greg Kroah-Hartman
2020-08-02 11:16 ` Andy Shevchenko
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