Re: PPro arch_cpu_idle: NMI watchdog: Watchdog detected hard LOCKUP on cpu 1

Meelis Roos
2017-03-02T03:35:05Z

> > This is on my trusty IBM PC365, dual Pentium Pro. 4.10 worked fine,
> > 4.10.0-09686-g9e314890292c and 4.10.0-10770-g2d6be4abf514 exhibit a
> > problem. Ocassionally NMI watchdog kicks in and discovers one of the
> > CPUs in LOCKUP. The system keeps running fine. The first lockup was
> > different, all the others were from arch_cpu_idle. Sometime ecey couple
> > of seconds (after some activity), sometimes nothing for a long time
> > (idle, no SSH logins).
>
> The only watchdog related patch which hit after 4.10 is:
>
> 8dcde9def5a1 kernel/watchdog.c: do not hardcode CPU 0 as the initial thread
>
> Can you try to revert that for a start? I'm not seeing why it should be the
> culprit from a quick glance, but ...

Reverting this patch does not help.