* Valentin Schneider [off-list ref] 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