Hi,
Backboost is gone so X really should be at -10 or even higher.
I'm now using 160 bits of the priority array instead of 140. This
works on x86, but I haven't had a look at other architectures.

Its still sort of in progress, but I thought I should send an update.
Its against 2.6.0-test4 and includes my other assorted scheduler patches.

Scheduling latency is very good now, < 50ms for a nice 0 process doing
nothing except a signal once in a while. This during a make -j3 compile
and mad X activity on UP.

I still need to think about how to get X working a bit more nicely
though. I'd like to be able to get good interactivity with large make
loads, but thats at the bottom of the list.