Re: [PATCH v2] cpuidle: Deny idle entry when CPU already have IPI interrupt pending

[Rafael J. Wysocki (Intel)]

On Fri, Aug 21, 2026 at 11:28 AM Daniel Lezcano
<daniel.lezcano@xxxxxxxxxxxxxxxx> wrote:
>
>
> Le 21/08/2026 à 07:03, Maulik Shah (mkshah) a écrit :
>
> [ ... ]
> >> What do we do about the cpuidle stats in that case?
> >> I'm thinking primiarly about last_residency_ns and rejected here.
> >
> > As the idle entry will not happen (call_cpuidle() is not invoked)
> > the stats would also not required to be updated.
> I agree, with the IPI pending it is like the idle task should have not
> be scheduled, so the idle call is aborted.

Which is why I think that this should be handled directly in the idle
loop and not in cpuidle_enter_state().

In that case, cpuidle should not be involved at all (if it is
sufficiently important for special-casing which I'm still not
convinced about).