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    SubjectRe: [PATCH][2.6] Hotplug cpu: Fix APIC queued timer vector race
    On Sun, 2004-08-22 at 00:10, Zwane Mwaikambo wrote:
    > Some timer interrupt vectors were queued on the Local APIC and were being
    > serviced when we enabled interrupts again in fixup_irqs(), so we need to
    > mask the APIC timer, enable interrupts so that any queued interrupts get
    > processed whilst the processor is still on the online map and then clear
    > ourselves from the online map. 1ms is a nice safe number even under heavy
    > interrupt load with higher priority vectors queued. Andrew this is
    > the patch i promised, Rusty, i'm not sure if you find
    > __attribute__((weak)) offensive...

    It's horrible. Please move the unsetting of the cpu_online bit into the
    arch-specific __cpu_disable() code for each arch, which is consistent
    and also simplifies things.

    Anyone who quotes me in their signature is an idiot -- Rusty Russell

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