On Sun, 16 Dec 2007, Herbert Xu wrote:
> If we can get the address of the per-cpu counter against
> some sort of a per-cpu base pointer, e.g., %gs on x86, then
> we can do
>
> incq %gs:(%rax)
>
> where %rax would be the offset with %gs as the base. This would
> obviate the need for the CPU ID and therefore avoid disabling
> preemption.
>
> Hmm, wasn't Christoph working on something like that?
Yes that is what the cpu alloc patchset implements.
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