>> I managed to reproduce the panic at the exactly same location which
>> people reported, with very high load of 6-parallel make (-j 6) ran on
>> /usr/src/lib/libc.  Another theory is EntryHi register has been changed
>> when the 'tlbp' is about to be called.
> 
>   Um, what happens if you get a TLB miss between the TLB mod exception and
> the MachTLBUpdate()?

It is as unfortunate as dodoo birds.

My MAXINE has servived last entire night 6-parallel make on libc with
continuous high load around 7-8 after the change. 

Tohru Nishimura