Re: [RFC PATCH v2 6/8] treewide: Trace IPIs sent via smp_send_reschedule()

Peter Zijlstra
2022-11-17T09:13:23Z

On Wed, Nov 02, 2022 at 06:33:34PM +0000, Valentin Schneider wrote:

> diff --git a/kernel/smp.c b/kernel/smp.c
> index c4d561cf50d45..44fa4b9b1f46b 100644
> --- a/kernel/smp.c
> +++ b/kernel/smp.c
> @@ -167,6 +167,14 @@ send_call_function_ipi_mask(const struct cpumask *mask)
> arch_send_call_function_ipi_mask(mask);
> }
>
> +void smp_send_reschedule(int cpu)
> +{
> + /* XXX scheduler_ipi is inline :/ */
> + trace_ipi_send_cpumask(cpumask_of(cpu), _RET_IP_, NULL);
> + arch_smp_send_reschedule(cpu);
> +}
> +EXPORT_SYMBOL_GPL(smp_send_reschedule);

Yeah, no.. I see some crazy archs do this, but no we're not exporting
this in generic.