Re: [PATCH v3 3/8] sched, smp: Trace IPIs sent via send_call_function_single_ipi()

Ingo Molnar
2023-01-07T11:04:47Z

* Valentin Schneider <vschneid@redhat.com> wrote:

> send_call_function_single_ipi() is the thing that sends IPIs at the bottom
> of smp_call_function*() via either generic_exec_single() or
> smp_call_function_many_cond(). Give it an IPI-related tracepoint.
>
> Note that this ends up tracing any IPI sent via __smp_call_single_queue(),
> which covers __ttwu_queue_wakelist() and irq_work_queue_on() "for free".
>
> Signed-off-by: Valentin Schneider <vschneid@redhat.com>
> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>

Acked-by: Ingo Molnar <mingo@kernel.org>

Patch series logistics:

- No objections from the scheduler side, this feature looks pretty useful.

- Certain patches are incomplete, others are noted as being merged
separately, so I presume you'll send an updated/completed series
eventually?

- We can merge this via the scheduler tree I suspect, as most callbacks
affected relate to tip:sched/core and tmp:smp/core - but if you have
some other preferred tree that's fine too.

Thanks,

Ingo