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    SubjectRe: [PATCH][2.5] fix preempt-issues with smp_call_function()
    Dave Jones <davej@codemonkey.org.uk> wrote:
    >
    > btw, (unrelated) shouldn't smp_call_function be doing magick checks
    > with cpu_online() ?

    Looks OK? It sprays the IPI out to all the other CPUs in cpu_online_map,
    and waits for num_online_cpus()-1 CPUs to answer.

    All very racy in the presence of CPUs going offline, but that's all over
    the place. Depends how the offlining will be done I guess.



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