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SubjectRe: [patch]2.4.0-test6 "spinlock" preemption patch
George Anzinger wrote:
>
> This patch, for 2.4.0-test6, allows the kernel to be built with full
> preemption.

Neat. Congratulations.

> ...
> The measured context switch latencies with this patch
> have been as high as 12 ms, however, we are actively working to
> isolate and fix the areas of the system where this occurs.

That has already been done! From memory, there are three long-lived
spinlocks which affect latency. Try applying
http://www.uow.edu.au/~andrewm/linux/low-latency.patch

Also, review Ingo's ll-patch. He may have picked up on some extra
ones.

http://www.redhat.com/~mingo/lowlatency-patches/
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