Re: [PATCH v9 12/12] x86/resctrl: Add MMIO-based LLC occupancy monitoring support

[Chen Yu <yu.c.chen@intel.com>]

On Tue, Oct 27, 2026 at 09:21:56AM -0700, Reinette Chatre wrote:
> Hi Chenyu,
>

[ ... ]

> >>> Although the occupancy counters can now be read from any CPU via
> >>> MMIO, keep the per-domain limbo handler. A global handler would
> >>> still have to iterate over every domain and would save nr_domains - 1
> >>
> >> Please write what "nr_domains - 1" means in English since as it is written
> >> it is not clear how this "does not justify maintaining two limbo handler
> >> models."
> >>
> > 
> > OK, I'll rephrase it to a simpler version, how about this:
> > 
> > Although the occupancy counters can now be read from any CPU via MMIO,
> > keep the per domain limbo handler. A single global handler would still
> > have to check the limbo RMIDs of every L3 domain, so it would do the same
> > amount of work. The only saving would be running one limbo worker instead
> > of one per L3 domain, which does not justify maintaining two limbo handler
> > models.
> 
> ok. One nit, please let it start with "Keep the per domain limbo handler ...".
>

OK, will do.

thanks,
Chenyu