linux-kernel - Re: [PATCH v6 01/30] x86,fs/resctrl: Consolidate monitor event descriptions

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Message-ID: <65c185de-b7a1-4959-84b6-399158865ab5@nvidia.com>
Date: Fri, 27 Jun 2025 14:55:58 -0700
From: Fenghua Yu <fenghuay@...dia.com>
To: Tony Luck <tony.luck@...el.com>,
 Reinette Chatre <reinette.chatre@...el.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 v6 01/30] x86,fs/resctrl: Consolidate monitor event
 descriptions


On 6/26/25 09:49, Tony Luck wrote:
> There are currently only three monitor events, all associated with
> the RDT_RESOURCE_L3 resource. Growing support for additional events
> will be easier with some restructuring to have a single point in
> file system code where all attributes of all events are defined.
>
> Place all event descriptions into an array mon_event_all[]. Doing
> this has the beneficial side effect of removing the need for
> rdt_resource::evt_list.
>
> Add resctrl_event_id::QOS_FIRST_EVENT for a lower bound on range
> checks for event ids and as the starting index to scan mon_event_all[].
>
> Drop the code that builds evt_list and change the two places where
> the list is scanned to scan mon_event_all[] instead using a new
> helper macro for_each_mon_event().
>
> Architecture code now informs file system code which events are
> available with resctrl_enable_mon_event().
>
> Signed-off-by: Tony Luck <tony.luck@...el.com>

Reviewed-by: Fenghua Yu <fenghuay@...dia.com>

Thanks.

-Fenghua

[SNIP]