Re: x86: Is there still value in having a special tlb flush IPI vector?

[Jeremy Fitzhardinge]

Peter Zijlstra wrote:
> 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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/