From: Reinette Chatre <reinette.chatre@intel.com>
To: Jinjie Ruan <ruanjinjie@huawei.com>,
Fenghua Yu <fenghuay@nvidia.com>, Tony Luck <tony.luck@intel.com>,
Ben Horgan <ben.horgan@arm.com>,
James Morse <james.morse@arm.com>,
Dave Martin <Dave.Martin@arm.com>, Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Shaopeng Tan <tan.shaopeng@fujitsu.com>,
Chen Yu <yu.c.chen@intel.com>, Babu Moger <babu.moger@amd.com>,
Drew Fustini <fustini@kernel.org>,
Vikram Sethi <vsethi@nvidia.com>,
Shanker Donthineni <sdonthineni@nvidia.com>,
Newton Liu <newtonl@nvidia.com>,
Richard Cheng <icheng@nvidia.com>
Cc: <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH RFC v2 00/19] arm,fs/resctrl: ARM MPAM MB_NODE support
Date: Fri, 23 Oct 2026 07:51:52 -0700 [thread overview]
Message-ID: <96795f1b-08ff-4d26-9b51-8c54bcbe537d@intel.com> (raw)
In-Reply-To: <87ecba5b-e396-45db-bab0-4eff0f30cb25@huawei.com>
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@intel.com/
>> [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@arm.com/
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@intel.com/
"arm_mpam: resctrl: Separate MPAM domains"
https://lore.kernel.org/lkml/cover.1792443633.git.reinette.chatre@intel.com/
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
next prev parent reply other threads:[~2026-10-23 14:52 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-31 17:22 Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 01/19] resctrl: De-hardcode L3 monitor infrastructure Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 02/19] resctrl: Expose MBA MBM counter assignment sysfs Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 03/19] resctrl: name node-scoped monitor domains mon_NODE_<id> Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 04/19] resctrl: Add node-scope MBM total event Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 05/19] resctrl: Make MBM paths resource-aware Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 06/19] arm_mpam: Support memory-level MSCs and ABMC per class Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 07/19] arm_mpam: Refine L3 topology and class selection Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 08/19] arm_mpam: Include all MSC components during domain setup Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 09/19] fs/resctrl: Take memory hotplug lock whenever taking CPU hotplug lock Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 10/19] arm_mpam: Handle CPU-less numa nodes Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 11/19] arm_mpam: Emulate MB control with node-scoped MB_NODE control Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 12/19] arm_mpam: resctrl: Add NUMA node notifier for domain online/offline Fenghua Yu
2026-09-07 11:12 ` Ben Horgan
2026-08-31 17:22 ` [PATCH RFC v2 13/19] resctrl: Add mbm_assign_scope_mode for native assignment file names Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 14/19] Documentation: resctrl: document mbm_assign_scope_mode Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 15/19] Documentation: arm64: mpam: document memory-level MB control and NUMA nodes Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 16/19] Documentation: resctrl: document NODE-scoped MBA domains and mon_NODE monitoring Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 17/19] Documentation: resctrl: document MB_NODE emulation example on ARM MPAM Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 18/19] arm_mpam: Add KUnit test for CPU-less NUMA node affinity Fenghua Yu
2026-08-31 17:22 ` [PATCH RFC v2 19/19] selftests/resctrl: Add MB emulation test for ARM MPAM Fenghua Yu
2026-09-01 9:37 ` [PATCH RFC v2 00/19] arm,fs/resctrl: ARM MPAM MB_NODE support Richard Cheng
2026-09-07 11:20 ` Ben Horgan
2026-10-12 13:30 ` [External] " yunhui cui
2026-10-23 1:23 ` Jinjie Ruan
2026-10-23 14:51 ` Reinette Chatre [this message]
2026-10-26 8:20 ` Jinjie Ruan
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