Peter Zijlstra wrote:
quoted text
> How about using just arch_send_call_function_single_ipi() to implement
> smp_send_reschedule() ?
>
> The overhead of that is a smp_mb() and a list_empty() check in
> generic_smp_call_function_single_interrupt() if there is indeed no work
> to do.
>   

Is doing a no-op interrupt sufficient on all architectures?  Is there
some change a function call IPI might not go through the normal
reschedule interrupt exit path?

    J

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