Re: [PATCH v5 04/10] x86/resctrl: Attach ACPI ERDT information to L3 mon domain on CPU online

[Chen, Yu C]

Hi Reinette,

On 7/15/2026 12:13 AM, Reinette Chatre wrote:
> Hi Chenyu,

[ ... ]

> > > > +     * erdt_domain_info reports that CPU{0,2} are in domain0,
> > > > +     * CPU{1,3} are in domain1. So when it comes to CPU1,
> > > > +     * a mismatch is detected, we should remove CPU1 from
> > > > +     * resctrl.
> > >
> > > CPU1 and CPU2?
> >
> > I think it should be CPU1 and CPU3 that will be removed from resctrl -
> > because the first CPU of the hw_dom->cpumask will not find a mismatch per
> > your description previously.
>
> I expected that only the CPUs CPUID and ACPI disagree on will be removed?
> In the example CPUID and ACPI agree on which domain CPU0 and CPU3 belongs to
> while they disagree on which domain CPU1 and CPU2 belongs to.

Got it. After switching to "check-before-add-to-cpumask", CPU1 and CPU2 
will be
filtered out. I'll adjust the code.

thanks,
Chenyu