linux-kernel - Re: [PATCH v13 29/32] x86/resctrl: Enable RDT_RESOURCE_PERF

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Message-ID: <dc10ea53-90dd-437d-b6d4-3cbe8158b8a1@intel.com>
Date: Thu, 13 Nov 2025 14:52:57 -0800
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 v13 29/32] x86/resctrl: Enable RDT_RESOURCE_PERF_PKG

Hi Tony,

On 10/29/25 9:21 AM, Tony Luck wrote:
> Since telemetry events are enumerated on resctrl mount the RDT_RESOURCE_PERF_PKG
> resource is not considered "monitoring capable" during early resctrl initialization.
> This means that the domain list for RDT_RESOURCE_PERF_PKG is not built when the CPU
> hot plug notifiers are registered and run for the first time right after resctrl
> initialization.
> 
> Mark the RDT_RESOURCE_PERF_PKG as "monitoring capable" upon successful telemetry
> event enumeration to ensure future CPU hotplug events include this resource and
> initialize its domain list for CPUs that are already online.
> 
> Print to console log announcing the name of the telemetry feature detected.
> 
> Signed-off-by: Tony Luck <tony.luck@...el.com>
> ---

Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>

Reinette