From: "Luck, Tony" <tony.luck@intel.com>
To: Babu Moger <babu.moger@amd.com>
Cc: <corbet@lwn.net>, <reinette.chatre@intel.com>,
<Dave.Martin@arm.com>, <james.morse@arm.com>, <tglx@kernel.org>,
<bp@alien8.de>, <dave.hansen@linux.intel.com>,
<skhan@linuxfoundation.org>, <x86@kernel.org>, <mingo@redhat.com>,
<hpa@zytor.com>, <akpm@linux-foundation.org>,
<rdunlap@infradead.org>, <pawan.kumar.gupta@linux.intel.com>,
<feng.tang@linux.alibaba.com>, <dapeng1.mi@linux.intel.com>,
<kees@kernel.org>, <elver@google.com>, <lirongqing@baidu.com>,
<paulmck@kernel.org>, <bhelgaas@google.com>, <seanjc@google.com>,
<alexandre.chartre@oracle.com>, <yazen.ghannam@amd.com>,
<peterz@infradead.org>, <chang.seok.bae@intel.com>,
<kim.phillips@amd.com>, <xin@zytor.com>, <naveen@kernel.org>,
<thomas.lendacky@amd.com>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <eranian@google.com>,
<peternewman@google.com>,
<sos-linux-ext-patches@mailman-svr.amd.com>
Subject: Re: [PATCH v3 00/12] [PATCH v3 00/12] x86/resctrl: Add kernel-mode (e.g., PLZA) support to the resctrl subsystem
Date: Fri, 26 Jun 2026 08:55:18 -0700 [thread overview]
Message-ID: <aj6g5jojdWASJ5YJ@agluck-desk3> (raw)
In-Reply-To: <cover.1777591496.git.babu.moger@amd.com>
On Thu, Apr 30, 2026 at 06:24:45PM -0500, Babu Moger wrote:
>
> Hi,
>
> This series adds support for AMD's Privilege-Level Zero Association
> (PLZA) so kernel work can be assigned to a resctrl group, and wires it
> up through a small generic "kernel mode" (kmode) layer in fs/resctrl
> so future architectures can plug in without touching core resctrl.
>
> The features are documented in:
>
> AMD64 Zen6 Platform Quality of Service (PQOS) Extensions,
> Publication # 69193 Revision 1.00, Issue Date March 2026
>
> available at https://bugzilla.kernel.org/show_bug.cgi?id=206537
>
> The patches are based on top of commit (7.1.0-rc1)
> Commit 3382329a309d Merge branch into tip/master: 'timers/clocksource'.
Hi Babu,
Have you had any thoughts about a resctrl selftest for PLZA?
I'm not sure there are any easy ways to show that PLZA is effective for
MBA control (as most normal system calls don't do enough to easily detect
whether the kernel CLOSID is applied). But perhaps you have some ideas for this?
A test that sets global_assign_ctrl_assign_mon_per_cpu mode with a dedicated
RMID to track kernel memory traffic would easily show MBM and llc_occupancy
numbers for kernel activity.
-Tony
prev parent reply other threads:[~2026-06-26 15:55 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-30 23:24 [PATCH v3 00/12] [PATCH v3 00/12] x86/resctrl: Add kernel-mode (e.g., PLZA) support to the resctrl subsystem Babu Moger
2026-04-30 23:24 ` [PATCH v3 01/12] x86/resctrl: Support Privilege-Level Zero Association (PLZA) Babu Moger
2026-06-11 23:23 ` Reinette Chatre
2026-06-12 16:56 ` Moger, Babu
2026-06-12 17:00 ` Moger, Babu
2026-06-17 0:00 ` Reinette Chatre
2026-06-17 16:28 ` Babu Moger
2026-04-30 23:24 ` [PATCH v3 02/12] x86/resctrl: Add data structures and definitions for PLZA configuration Babu Moger
2026-06-11 23:40 ` Reinette Chatre
2026-06-12 15:40 ` Luck, Tony
2026-06-12 17:46 ` Moger, Babu
2026-06-12 17:32 ` Moger, Babu
2026-06-12 17:49 ` Moger, Babu
2026-04-30 23:24 ` [PATCH v3 03/12] fs/resctrl: Add kernel mode (kmode) data structures and arch hook Babu Moger
2026-06-16 23:30 ` Reinette Chatre
2026-06-17 19:36 ` Babu Moger
2026-04-30 23:24 ` [PATCH v3 04/12] x86,fs/resctrl: Program PLZA through kmode arch hooks Babu Moger
2026-05-19 20:59 ` Luck, Tony
2026-05-20 17:49 ` Babu Moger
2026-05-20 22:16 ` Luck, Tony
2026-05-20 23:09 ` Moger, Babu
2026-06-11 11:44 ` Peter Newman
2026-06-11 14:46 ` Babu Moger
2026-06-16 23:33 ` Reinette Chatre
2026-06-17 23:15 ` Moger, Babu
2026-04-30 23:24 ` [PATCH v3 05/12] x86/resctrl: Initialize supported kernel modes for PLZA Babu Moger
2026-06-16 23:35 ` Reinette Chatre
2026-06-18 16:20 ` Babu Moger
2026-04-30 23:24 ` [PATCH v3 06/12] fs/resctrl: Initialize the global kernel-mode policy at subsystem init Babu Moger
2026-06-16 23:36 ` Reinette Chatre
2026-06-18 17:14 ` Babu Moger
2026-06-22 16:21 ` Reinette Chatre
2026-06-22 16:38 ` Babu Moger
2026-04-30 23:24 ` [PATCH v3 07/12] fs/resctrl: Add info/kernel_mode for kernel-mode policy introspection Babu Moger
2026-06-16 23:38 ` Reinette Chatre
2026-06-18 19:16 ` Babu Moger
2026-04-30 23:24 ` [PATCH v3 08/12] fs/resctrl: Make info/kernel_mode writable and identify the bound group Babu Moger
2026-06-16 23:42 ` Reinette Chatre
2026-06-19 1:29 ` Babu Moger
2026-06-22 16:47 ` Reinette Chatre
2026-06-22 19:03 ` Babu Moger
2026-04-30 23:24 ` [PATCH v3 09/12] fs/resctrl: Reset kernel-mode binding when its rdtgroup goes away Babu Moger
2026-06-16 23:42 ` Reinette Chatre
2026-06-19 20:22 ` Babu Moger
2026-04-30 23:24 ` [PATCH v3 10/12] fs/resctrl: Expose kmode_cpus / kmode_cpus_list per rdtgroup Babu Moger
2026-04-30 23:24 ` [PATCH v3 11/12] resctrl: Hide kmode_cpus[_list] on groups not bound to kernel-mode Babu Moger
2026-04-30 23:24 ` [PATCH v3 12/12] fs/resctrl: Allow user space to write kmode_cpus / kmode_cpus_list Babu Moger
2026-06-11 21:53 ` [PATCH v3 00/12] [PATCH v3 00/12] x86/resctrl: Add kernel-mode (e.g., PLZA) support to the resctrl subsystem Reinette Chatre
2026-06-12 15:37 ` Moger, Babu
2026-06-17 4:34 ` Reinette Chatre
2026-06-17 15:56 ` Babu Moger
2026-06-17 17:33 ` Reinette Chatre
2026-06-17 19:55 ` Babu Moger
2026-06-26 15:55 ` Luck, Tony [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=aj6g5jojdWASJ5YJ@agluck-desk3 \
--to=tony.luck@intel.com \
--cc=Dave.Martin@arm.com \
--cc=akpm@linux-foundation.org \
--cc=alexandre.chartre@oracle.com \
--cc=babu.moger@amd.com \
--cc=bhelgaas@google.com \
--cc=bp@alien8.de \
--cc=chang.seok.bae@intel.com \
--cc=corbet@lwn.net \
--cc=dapeng1.mi@linux.intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=elver@google.com \
--cc=eranian@google.com \
--cc=feng.tang@linux.alibaba.com \
--cc=hpa@zytor.com \
--cc=james.morse@arm.com \
--cc=kees@kernel.org \
--cc=kim.phillips@amd.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lirongqing@baidu.com \
--cc=mingo@redhat.com \
--cc=naveen@kernel.org \
--cc=paulmck@kernel.org \
--cc=pawan.kumar.gupta@linux.intel.com \
--cc=peternewman@google.com \
--cc=peterz@infradead.org \
--cc=rdunlap@infradead.org \
--cc=reinette.chatre@intel.com \
--cc=seanjc@google.com \
--cc=skhan@linuxfoundation.org \
--cc=sos-linux-ext-patches@mailman-svr.amd.com \
--cc=tglx@kernel.org \
--cc=thomas.lendacky@amd.com \
--cc=x86@kernel.org \
--cc=xin@zytor.com \
--cc=yazen.ghannam@amd.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox