linux-kernel - Re: [PATCH v9 28/31] x86/resctrl: Enable RDT_RESOURCE_PERF

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Message-ID: <fd1a7cb2-a5de-4e66-8c70-6ec6934d8e9b@intel.com>
Date: Wed, 10 Sep 2025 10:58:27 -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 v9 28/31] x86/resctrl: Enable RDT_RESOURCE_PERF_PKG

Hi Tony,

On 8/29/25 12:33 PM, Tony Luck wrote:
> The RDT_RESOURCE_PERF_PKG resource is not marked as "mon_capable" during
> early resctrl initialization. This means that the domain lists for the
> resource are not built when the CPU hot plug notifiers are registered.
> 
> Set the global rdt_mon_capable (to cover the case when none of the L3
> monitor events are enabled).
> 
> Mark the resource as mon_capable and call domain_add_cpu_mon() for
> each online CPU to build the domain lists in the first call to the
> resctrl_arch_pre_mount() hook.

This just describes what can be seen in patch.

Reinette