linux-kernel - Re: [PATCH v8:for-boris 00/30] x86/resctrl: Move the resctrl filesystem code to /fs/resctrl

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Message-ID: <Z9DpDKO4wLEfVVcs@agluck-desk3>
Date: Tue, 11 Mar 2025 18:53:16 -0700
From: "Luck, Tony" <tony.luck@...el.com>
To: James Morse <james.morse@....com>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org,
	Reinette Chatre <reinette.chatre@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	H Peter Anvin <hpa@...or.com>, Babu Moger <Babu.Moger@....com>,
	shameerali.kolothum.thodi@...wei.com,
	D Scott Phillips OS <scott@...amperecomputing.com>,
	carl@...amperecomputing.com, lcherian@...vell.com,
	bobo.shaobowang@...wei.com, tan.shaopeng@...itsu.com,
	baolin.wang@...ux.alibaba.com, Jamie Iles <quic_jiles@...cinc.com>,
	Xin Hao <xhao@...ux.alibaba.com>, peternewman@...gle.com,
	dfustini@...libre.com, amitsinght@...vell.com,
	David Hildenbrand <david@...hat.com>,
	Rex Nie <rex.nie@...uarmicro.com>,
	Dave Martin <dave.martin@....com>, Koba Ko <kobak@...dia.com>,
	Shanker Donthineni <sdonthineni@...dia.com>, fenghuay@...dia.com
Subject: Re: [PATCH v8:for-boris 00/30] x86/resctrl: Move the resctrl
 filesystem code to /fs/resctrl

On Tue, Mar 11, 2025 at 06:36:45PM +0000, James Morse wrote:
> Changes since v7?:
>  * Series split to the first 30 patches, requested by Boris.
>  * Fixed stale function names, definitions/declartions and typos.
>  * Dropped the use of the default ctrlval helper in cache_alloc_hsw_probe()
> 
> As ever, changes are noted on each patch.
> ---
> This series renames functions and moves code around. With the
> exception of invalid configurations for the configurable-events, there should
> be no changes in behaviour caused by this series. It is now possible for
> throttle_mode to report 'undefined', but no known platform will do this.
> 
> The driving pattern is to make things like struct rdtgroup private to resctrl.
> Features like pseudo-lock aren't going to work on arm64, the ability to disable
> it at compile time is added.
> 
> All this is to allow the filesystem portions of resctrl to be moved to live in /fs/,
> which allows resctrl to be supported by other architecture, such as arm64's MPAM.
> (What's MPAM? See the cover letter of the first series. [1])
> 
> This series is based on v6.14-rc3 and can be retrieved from:
> https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v8_for_boris
> 
> As ever - bugs welcome,
> Thanks,
> 
> James

Built, booted, and ran tools/testing/selftests/resctrl/resctrl_tests
successfully on Intel Icelake.

-Tony