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    SubjectRe: hot cache line due to note_interrupt()

    Hi,

    > I also verified on a system simulator that the counter in
    > note_interrupt() is the only line that is bounced between cpus at a HZ
    > rate on an idle system.
    >
    > The IPI & reschedule interrupts have a similar problem but at a lower
    > rate.

    We havent seen this on ppc64 because our timer interrupt doesnt go via
    the standard interrupt path (its a separate exception). IPIs do however
    so Id expect these to be a problem for us.

    Anton
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