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

[Meelis Roos]

> > 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.

-- 
Meelis Roos (mroos@xxxxxxxx)