linux-kernel - Re: [PATCH v5 27/29] fs/resctrl: Add file system mechanism for architecture info file

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Message-ID: <f25d136c-b1d3-483a-ac77-92464d7fe25c@intel.com>
Date: Tue, 3 Jun 2025 21:15:02 -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>, Anil Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	Chen Yu <yu.c.chen@...el.com>
CC: <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	<patches@...ts.linux.dev>
Subject: Re: [PATCH v5 27/29] fs/resctrl: Add file system mechanism for
 architecture info file

Hi Tony,

On 5/21/25 3:50 PM, Tony Luck wrote:
> Creation of all files in the resctrl file system is under control of
> the file system layer.
> 
> But some resources may need to add a file to the info/{resource}
> directory for debug purposes.
> 
> Add a new rdt_resource::info_file field for the resource to specify
> show() and/or write() operations. These will be called with the
> rdtgroup_mutex held.
> 
> Architecture can note the file is only for debug using by setting
> the rftype::flags RFTYPE_DEBUG bit.

This needs to change. This punches a crater through the separation
between fs and arch that we worked hard to achieve. Please make an attempt
to do so as I am sure you can.

Reinette