kernal panic when trying to recompile world or kernel

[Lowell Gilbert]

"Hicks, Raymond" <Raymond.Hicks at dhs.gov> writes:

>   I was hoping to get some insight into what could be causing these issues.
> Any thing you can do to help is appreciated. Here is the situation: 
> 
>   I have an asus A7M-266D with dual athalon MP 1800+  and 1.5G of DDR 2100
> RAM.  The machine has 3 120GIG IDE drives, one floppy and one CD drive.
> Drives are western digital. The kernel is compiled for SMP and the release
> is FREEBSD-5.1-RELEASE although sources were current till about June at
> which time I moved and did not do much to system.  Now I have gotten the
> system out of storage and set it up .. it runs fine but I have recently
> tried to cvsup then recompile world and I get: 
> 
> KERNEL PANIC with CPUID = 0 
> lapic.id = 00000000
> 
>   It seems like a random error in that it sometimes does it in 2 minutes and
> other times it will go for almost 10 minutes.  Once it happens, the machine
> reboots.  I originally thought this could be due to heat from processors so
> I took measures to reduce heat.  There are currently 2 fans pushing air into
> the case and 3 fans plus 1 blower pulling air out of the case.  Each CPU has
> a new amd cpu fan with bearings and the temp is well within the limits of
> normal operation.   I am at a loss for this and was wondering if anyone had
> any ideas on ways to fix / mitigate.  

Still sounds like some kind of hardware problem, because it runs fine
as long as it isn't under pressure and fails in a different way each
time.  If it's always the same CPU, that may be a hint.  Bad RAM is
the most frequent culprit for such unpredictable problems, though.

If you have the opportunity to disable SMP and try again (e.g., you
have a GENERIC kernel around that matches your userland), that would
be worth a shot.