From: "Moger, Babu" <bmoger@amd.com>
To: Reinette Chatre <reinette.chatre@intel.com>,
Babu Moger <babu.moger@amd.com>,
corbet@lwn.net, tony.luck@intel.com, Dave.Martin@arm.com,
james.morse@arm.com, tglx@kernel.org, bp@alien8.de,
dave.hansen@linux.intel.com
Cc: 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
Subject: Re: [PATCH v3 01/12] x86/resctrl: Support Privilege-Level Zero Association (PLZA)
Date: Fri, 12 Jun 2026 12:00:16 -0500 [thread overview]
Message-ID: <bb603c09-cd23-4fd4-8a50-e7f9f9648a5e@amd.com> (raw)
In-Reply-To: <a737ae9e-9cbc-46bb-b565-0b888e69f0ea@amd.com>
Hi Reinette,
Missed typo again.
On 6/12/2026 11:56 AM, Moger, Babu wrote:
> Hi Reinette,
>
> On 6/11/2026 6:23 PM, Reinette Chatre wrote:
>> Hi Babu,
>>
>> On 4/30/26 4:24 PM, Babu Moger wrote:
>>> Customers have identified an issue while using the QoS resource Control
>>
>> "Control" -> "control"?
>>
>
> ack
>
>>> feature. If a memory bandwidth associated with a CLOSID is aggressively
>>
>> "a memory bandwidth" -> "memory bandwidth"?
>
> ack.
>
>>
>>> throttled, and it moves into Kernel mode, the Kernel operations are also
>>
>> What does "it" refer to here? From text it seems to be the "CLOSID"
>> but that
>> does not sound right? Should "it" instead be something like "a task
>> with that
>> CLOSID"?
>
> sure.
>
>>
>> "Kernel" -> "kernel"?
>
> ack.
>>
>>> aggressively throttled. This can stall forward progress and eventually
>>> degrade overall system performance. AMD hardware supports a feature
>>> Privilege-Level Zero Association (PLZA) to change the association of the
>>> thread as soon as it begins executing.
>>
>> "change the association of the thread as soon as it begins executing."
>> I am
>> not able to parse this.
>
> How about ?
>
> Customers have identified an issue while using the QoS resource Control
Control > control
Thanks
Babu
next prev parent reply other threads:[~2026-06-12 17:00 UTC|newest]
Thread overview: 50+ 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 [this message]
2026-06-17 0:00 ` Reinette Chatre
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
2026-04-30 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
2026-06-05 10:06 ` Qinyun Tan
2026-06-08 18:17 ` Babu Moger
2026-06-11 11:44 ` Peter Newman
2026-06-11 14:46 ` Babu Moger
2026-06-16 23:33 ` Reinette Chatre
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
2026-04-30 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
2026-04-30 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
2026-04-30 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
2026-04-30 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
2026-04-30 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
2026-06-08 9:23 ` [PATCH v3 00/12] x86/resctrl: Add kernel-mode (e.g., PLZA) support to the resctrl subsystem Qinyun Tan
2026-06-09 14:10 ` Babu Moger
2026-06-10 1:40 ` qinyuntan
2026-06-11 11:17 ` [PATCH 0/4] x86,fs/resctrl: kernel-mode (PLZA) fixes found during review Qinyun Tan
2026-06-11 21:02 ` Babu Moger
2026-06-11 11:17 ` [PATCH 1/4] resctrl: Add kmode arch stubs for ARM MPAM and hide kernel_mode on non-PLZA platforms Qinyun Tan
2026-06-11 11:33 ` [PATCH v2 1/4] resctrl: Add kmode arch stubs for ARM MPAM Qinyun Tan
2026-06-11 11:17 ` [PATCH 2/4] resctrl: Fix PLZA RMID_EN to be mode-based and relax RDTMON_GROUP constraint for assign_mon Qinyun Tan
2026-06-11 11:17 ` [PATCH 3/4] fs/resctrl: make a failed kernel-mode switch a no-op Qinyun Tan
2026-06-11 11:17 ` [PATCH 4/4] fs/resctrl: program PLZA on a CPU that comes online under a binding Qinyun Tan
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
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