> The preemptible kernel can reschedule, on average, sooner than the
> scheduling-point kernel, which has to wait for a scheduling point to
> roll around.
The preemptible kernel ALSO has to wait for a scheduling point
to roll around, since it cannot preempt with spinlocks held.
Considering this, I don't see much of an advantage to adding
kernel preemption.
regards,
Rik
--
"Linux holds advantages over the single-vendor commercial OS"
-- Microsoft's "Competing with Linux" document
http://www.surriel.com/ http://distro.conectiva.com/
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