Andrew, hopefully this'll give you a cleaner integration point to do 
the HT scheduler stuff ... I basically did a rename of "node" to "pool" 
on sched.c (OK, it was a little more complex than that), and provided
some hooks for you to attatch to. There's a really hacky version of
the HT stuff in there that I doubt works at all. (sched.h will need
something other than CONFIG_SCHED_NUMA, for starters). 

It's not really finished, but I have to go out ... I thought you or 
someone else might like to have a play with it in the meantime. 
Goes on top of the second half of Ingo's stuff from yesterday 
(also attatched).

I think this should result in a much cleaner integration between the HT
aware stuff and the NUMA stuff. Pools is a concept Erich had in his
scheduler a while back, but it got set aside in the paring down for
integration. We should be able to add multiple levels to this fairly
easily, at some point (eg HT + NUMA), but let's get the basics working
first ;-)

M.