Re: [PATCH RFC v2 00/19] arm,fs/resctrl: ARM MPAM MB_NODE support

[Reinette Chatre]

Hi Jinjie,

On 10/22/26 6:23 PM, Jinjie Ruan wrote:
> 
> 
> 在 2026/9/1 1:22, Fenghua Yu 写道:
>> This series enables MBA bandwidth control emulation on ARM MPAM when the
>> default MB control is disabled, using a node-scoped MB_NODE control as
>> the native backend.  It extends memory-bandwidth monitoring and
> 
> Hi everyone,
> 
> We also have the requirement for the MPAM node-scoped MB_NODE control.
> Are there any follow-up plans for this feature?
> 
> Is there anything I can help with?
> 

...

>>
>> Apply the patches on top of [2].
>>

...

>>
>> This series is in https://github.com/fyu1/linux/  cpu_less.rfc.v2/
>> which is on top of [2].
>>

...

>>
>> [1] [RFC v2] mpam,x86,fs/resctrl: Generic schema description Proof of Concept https://lore.kernel.org/lkml/d258a32f-12d5-464d-abe9-4720fb3e44b3@xxxxxxxxx/
>> [2] Reinette's resctrl control branch RFC v2: git://git.kernel.org/pub/scm/linux/kernel/git/reinette/linux.git branch resctrl/controls_rfc_v2.4
>>
This work depends on [2] around which I believe all discussions have now settled
with the planned changes shared during LPC:
https://lpc.events/event/20/contributions/2368/attachments/2066/4625/resctrl_2026_combined.pdf

Please note, as highlighted in 

	https://lore.kernel.org/lkml/9d2f589a-7d10-44ee-a7a4-7d75d860e988@xxxxxxx/

as well as the LPC presentation, that the support for MB_NODE is planned to look
different from what is presented in this RFC.

Upstreaming of [2] started with two series currently outstanding:

"x86,fs/resctrl: Cleanups in preparation for multiple controls support"
	https://lore.kernel.org/lkml/cover.1791406459.git.reinette.chatre@xxxxxxxxx/

"arm_mpam: resctrl: Separate MPAM domains"
	https://lore.kernel.org/lkml/cover.1792443633.git.reinette.chatre@xxxxxxxxx/

I see that you already started to take a look at the MPAM changes. That is much appreciated.
Any reviews are much appreciated.

Once the above two outstanding series land I will work on the next batch of the foundational
work on which the MB_NODE support can be created.

Reinette