>  > Jason, just to be accurate, does NetBSD/alpha have a sufficiently 
>  > re-entrant kernel that it can run simultaneously on all processors, 
>  > as required? Do we do interrupt processing on all processors?
> 
> General I/O interrupts, no.  Clock interrupts, yes.

Also, there's nothing in the MI kernel code in -current which requires
that I/O interrupts run only on the master processor.

> So, "symmetric multiprocessing", as I have always understood the term,
> simply refers to the ability for all processors to run general kernel
> code, not necessarily concurrently.  Please correct me if I am simply
> confused on this point :-)

That's my understanding as well.  

						- Bill