Re: [PATCH 1/2] x86/resctrl: Add io_alloc_min_cbm_all interface for CBM reset

From: Aaron Tomlin

Date: Tue Nov 11 2025 - 17:34:40 EST


On Tue, Nov 11, 2025 at 03:04:55PM -0600, Babu Moger wrote:
> > Here’s my understanding of the discussion from this thread:
> >
> >
> > We plan to support the following operation:
> >
> >    #echo "*=value" > /sys/fs/resctrl/info/L3/io_alloc_cbm
> >
> Looks like we are going with the above approach where "*" represents all the
> domain.
>
> Couple of things to consider.
>
> a. Send a separate patch to add this feature after [1] is merged.
>
> b. Add this change as part of [1] series in patch 9. The series is mostly
> ready for merge. I can add the changes. Only concern is, it will might delay
> the series merge little bit.  My expectation is to have this series ready
> for next merge window.
>
> [1] https://lore.kernel.org/lkml/cover.1761844489.git.babu.moger@xxxxxxx/
>
> Any thoughts?
>
> Thanks
>

Hi Babu, Tony, Reinette,

I believe the most prudent course of action would be to hold off on this
particular change until the main series has been merged.

As I was the one who specifically requested this supporting functionality,
I would be happy to prepare and submit the follow-up patch for this detail
myself.


Kind regards,
--
Aaron Tomlin