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From: Chen Yu <yu.c.chen@intel.com>
To: Babu Moger <babu.moger@amd.com>
Cc: <tony.luck@intel.com>, <reinette.chatre@intel.com>,
	<Dave.Martin@arm.com>, <james.morse@arm.com>, <bp@alien8.de>,
	<ben.horgan@arm.com>, <corbet@lwn.net>,
	<skhan@linuxfoundation.org>, <rdunlap@infradead.org>,
	<tglx@kernel.org>, <mingo@redhat.com>,
	<dave.hansen@linux.intel.com>, <hpa@zytor.com>,
	<fenghuay@nvidia.com>, <akpm@linux-foundation.org>,
	<rppt@kernel.org>, <dapeng1.mi@linux.intel.com>,
	<elver@google.com>, <jlayton@kernel.org>,
	<enelsonmoore@gmail.com>, <kuba@kernel.org>,
	<ebiggers@kernel.org>, <seanjc@google.com>,
	<peterz@infradead.org>, <chao.gao@intel.com>,
	<jmattson@google.com>, <naveen@kernel.org>,
	<ricardo.neri-calderon@linux.intel.com>, <tiala@microsoft.com>,
	<chang.seok.bae@intel.com>, <prathyushi.nangia@amd.com>,
	<kim.phillips@amd.com>, <elena.reshetova@intel.com>,
	<darwi@linutronix.de>, <linux-doc@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <x86@kernel.org>,
	<chen.yu@linux.dev>
Subject: Re: [PATCH v5 00/16] x86/resctrl: Add kernel-mode (e.g., PLZA) support to the resctrl subsystem
Date: Mon, 21 Sep 2026 11:22:46 +0800	[thread overview]
Message-ID: <arCjBqclcfHBP8fH@chenyu-dev> (raw)
In-Reply-To: <cover.1787772750.git.babu.moger@amd.com>

Hi Babu,

On Wed, Aug 26, 2026 at 02:32:14PM -0500, Babu Moger wrote:
> 
> 
>   # Create a CTRL_MON group and associate kernel-mode allocation with it.
>   # mkdir ctrl1
>   # echo "assign_global_enable_per_cpu:ctrl=assign;mon=inherit;group=ctrl1//" \
>           > info/kernel_mode
>   # cat info/kernel_mode
>   inherit_user
>   [assign_global_enable_per_cpu:ctrl=assign;mon=inherit;group=ctrl1//]
> 
>   # kmode_cpus and kmode_cpus_list are visible only on the associated group.
>   # ls ctrl1/kmode_cpus*
>   ctrl1/kmode_cpus  ctrl1/kmode_cpus_list
>

Just curious, would the other existing files like "tasks" be exposed under ctrl1?
If this ctrl1 is used only for "kernel space" mode, would the schemata of ctrl1 be
shared by all tasks in the system? That is to say, it seems that there is no need to
expose "tasks" under ctrl1. Should we hide "tasks" for the kernel group? Please
correct me if I misunderstood.

thanks,
Chenyu

  parent reply	other threads:[~2026-09-21  3:36 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-26 19:32 Babu Moger
2026-08-26 19:32 ` [PATCH v5 01/16] x86/cpufeatures: Support Privilege Level Zero Association (PLZA) Babu Moger
2026-09-16  5:12   ` Reinette Chatre
2026-09-16 20:45     ` Babu Moger
2026-09-17 15:04       ` Reinette Chatre
2026-09-17 17:08         ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 02/16] x86/resctrl: Add PLZA support to command-line options Babu Moger
2026-09-16  5:12   ` Reinette Chatre
2026-09-16 20:45     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 03/16] x86/resctrl: Add PLZA configuration definitions and data structures Babu Moger
2026-09-16  5:16   ` Reinette Chatre
2026-09-16 20:53     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 04/16] fs/resctrl: Introduce kernel mode policy enum Babu Moger
2026-09-16  5:14   ` Reinette Chatre
2026-09-16 20:53     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 05/16] x86,fs/resctrl: Introduce architecture hooks to program kernel mode Babu Moger
2026-09-16  5:26   ` Reinette Chatre
2026-09-16 20:57     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 06/16] fs/resctrl: Introduce kernel mode states for resctrl Babu Moger
2026-09-16  5:28   ` Reinette Chatre
2026-09-17 14:05     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 07/16] fs/resctrl: Introduce resctrl_set_kmode_support() to register supported modes Babu Moger
2026-09-16  5:29   ` Reinette Chatre
2026-09-17 14:20     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 08/16] x86/resctrl: Expose assign_global_enable_per_cpu when PLZA is available Babu Moger
2026-08-26 19:32 ` [PATCH v5 09/16] fs/resctrl: Add interface to display supported and active kernel modes Babu Moger
2026-09-16  5:32   ` Reinette Chatre
2026-09-17 15:29     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 10/16] fs/resctrl: Add support for hidden resource group files Babu Moger
2026-09-16  5:33   ` Reinette Chatre
2026-09-17 17:26     ` Babu Moger
2026-09-17 18:31       ` Reinette Chatre
2026-09-17 18:54         ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 11/16] fs/resctrl: Introduce kmode_cpus/kmode_cpus_list per rdtgroup Babu Moger
2026-09-16  5:34   ` Reinette Chatre
2026-09-17 18:19     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 12/16] fs/resctrl: Program kernel mode assignments on CPU hotplug Babu Moger
2026-09-16  5:35   ` Reinette Chatre
2026-09-17 18:26     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 13/16] fs/resctrl: Deactivate the kernel mode association when a group is removed Babu Moger
2026-09-16  5:36   ` Reinette Chatre
2026-09-17 19:25     ` Babu Moger
2026-09-17 19:48       ` Reinette Chatre
2026-08-26 19:32 ` [PATCH v5 14/16] fs/resctrl: Add interface to modify kernel mode via info/kernel_mode Babu Moger
2026-09-16  5:50   ` Reinette Chatre
2026-09-17 20:54     ` Babu Moger
2026-08-26 19:32 ` [PATCH v5 15/16] fs/resctrl: Allow user space to write kmode_cpus/kmode_cpus_list Babu Moger
2026-08-26 19:32 ` [PATCH v5 16/16] fs/resctrl: Add documentation on kernel_mode with example Babu Moger
2026-09-01 21:14   ` Luck, Tony
2026-09-01 23:28     ` Moger, Babu
2026-09-21  3:22 ` Chen Yu [this message]
2026-09-21 19:27   ` [PATCH v5 00/16] x86/resctrl: Add kernel-mode (e.g., PLZA) support to the resctrl subsystem Babu Moger

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