linux-kernel - Re: [PATCH v8 30/32] fs/resctrl: Provide interface to create architecture specific debugfs area

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Message-ID: <94295ce0-0ed7-482f-8475-5f3fcaf63772@intel.com>
Date: Thu, 14 Aug 2025 14:57:20 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghuay@...dia.com>, "Maciej
 Wieczor-Retman" <maciej.wieczor-retman@...el.com>, Peter Newman
	<peternewman@...gle.com>, James Morse <james.morse@....com>, Babu Moger
	<babu.moger@....com>, Drew Fustini <dfustini@...libre.com>, Dave Martin
	<Dave.Martin@....com>, Chen Yu <yu.c.chen@...el.com>
CC: <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	<patches@...ts.linux.dev>
Subject: Re: [PATCH v8 30/32] fs/resctrl: Provide interface to create
 architecture specific debugfs area

Hi Tony,

On 8/11/25 11:17 AM, Tony Luck wrote:
> All files below /sys/fs/resctrl are considered user ABI.
> 
> This leaves no place for architectures to provide additional
> interfaces.
> 
> Add resctrl_debugfs_mon_info_arch_mkdir() which creates a directory in the
> debugfs file system for a resource. Naming follows the layout of the

"a resource" -> "a monitoring resource"

> main resctrl hierarchy:
> 
> 	/sys/kernel/debug/resctrl/info/{resource}_MON/{arch}
> 
> The {arch} last level directory name matches the output of
> the user level "uname -m" command.
> 
> Architecture code may use this directory for debug information,
> or for minor tuning of features. It must not be used for basic
> feature enabling as debugfs may not be configured/mounted on
> production systems.
> 
> Suggested-by: Reinette Chatre <reinette.chatre@...el.com>
> Signed-off-by: Tony Luck <tony.luck@...el.com>
> ---

Reinette