number of CPUs and IPI panic

[John Baldwin]

On Wednesday 20 October 2004 06:01 pm, Nik Azim Azam wrote:
> hello list,
>
> i'm doing some testing on a 6 cpu pentium II overdrive
> computer with 6-CURRENT. with 6 cpus, the system will
> panic easily with moderate load (previous IPI is
> stuck). i edited sys/i386/sys/param.h file and lowered
> the MAXCPU to 4. now the system is running with 4 cpus
> and it survived a make buildworld + portupgrade at the
> same time.
>
> is this a known problem? i can give more information
> if anyone interested.

My quad PII-Xeon is also very unstable.  You can try setting the 
kern.sched.ipiwakeups.enabled sysctl to 0 to help improve the stability.  It 
may not completely fix the problem, however.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org