Re: [PATCH 5/7] thermal: intel: hfi: Enable notification interrupt

[Ricardo Neri]

On Mon, Nov 08, 2021 at 10:01:04AM +0100, Peter Zijlstra wrote:
> On Fri, Nov 05, 2021 at 06:33:10PM -0700, Ricardo Neri wrote:
> > +	/*
> > +	 * On most systems, all CPUs in the package receive a package-level
> > +	 * thermal interrupt when there is an HFI update. Since they all are
> > +	 * dealing with the same update (as indicated by the update timestamp),
> > +	 * it is sufficient to let a single CPU to acknowledge the update and
> > +	 * schedule work to process it.
> > +	 */
> 
> That's pretty crap hardware behaviour. Is there really no way to steer
> these interrupts?

The HFI is a package-level thermal interrupt. Hence, all CPUs get it.
AFAIK there is no way to steer the interrupts.

Thanks and BR,
Ricardo