> : >> If I remember from a discussion with John Baldwin, the reason we
> : >> don't do this (yet) is that HLT only wakes up when you take an
> : >> interrupt, and there are cases where we can't guarantee that we'll
> : >> take an interrupt in order to get us out of the HLT.
> : >
> : >I thought that's what the timer interrupts were for...  We can't
> : >guarantee that we'll get one?  That seems very serious to me.
> : 
> : The problem is that one cpu may wich to schedule a process to run on
> : the idle cpu, but it can't because the idle cpu is halted and won't
> : wake up until the next irq.
> Since I'm running a UP kernel, that can't happen.

Actually, there are pathalogical cases where it could, but they are, 
well, pathalogical. 8)

... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also.  But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view.  [Dr. Fritz Todt]

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