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    SubjectRe: [PATCH] SMP signal latency fix up.

    > the 'is it running' check is 'task_curr(p)', which in this circumstance is
    > equivalent to the following test:
    >
    > per_cpu(runqueues, (cpu)).curr == p

    btw., the 'is it running right now' test is a necessary thing as well - we
    really dont want to flood CPUs with IPIs which just happen to have the
    target task in their runqueue (but the task is not executing).

    Ingo
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