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SubjectRe: new IRQ scalability changes in 2.3.48

On Thu, 2 Mar 2000, Andrea Arcangeli wrote:

> Agreed ;). OTOH there's a minor pros with such SMP irq design that we are
> forced to use: we kill irq latency best. IO-APIC AFIK chooses the CPU that
> is handling the lower bus load at irq time, but it doesn't choose the CPU
> that has irq enabled AFIK.

incorrect, it does.

> "From all processors listed in the destination, the processor
> selected is the one whose current arbitration priority is the
> lowest."

check out the 'focus CPU' feature.

-- mingo


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