Interrupt API change

[Scott Long]

Jeff Roberson wrote:
> 
> There are still significant optimizations to be done in interrupt
> scheduling.  It seems to me that the filter idea is not a good one if we
> can make ithread scheduling extremely cheap, which we can.  Ideally, it
> should just be little more than a stack switch.  I'd rather see us put
> effort into this than put effort into defeating the goal of a system which
> we have not even finished implementing yet.
> 
> Cheers,
> Jeff
> 

I completely agree.  However, I don't have the knowledge to do these
optimizations, so I'm preparing this as a contingency plan.  If you,
Peter, Bosko, etc, can put your heads together and come up with a 
prototype in the next few weeks, that would be awesome.

Scott