does IPI_PREEMPTION in the kernel config do anything

Paul B. Mahol onemda at
Sun Jan 11 01:20:01 PST 2009

On 1/11/09, Aryeh M. Friedman <aryeh.friedman at> wrote:
> For the last year I have been using IPI_PREEMPTION in my kernel config
> and I know back then it helped quite a bit on the performence of my dual
> core... now I am setting a 4 core machine using 7.1pl1 (i386) [on the
> dual core I {and will continue} to use -current] and was just wondering
> if IPI_PREEMPTION actually maeans anything anymore

IPI_PREEMPTION is used only with 4bsd scheduler.


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