linux-kernel - Re: [PATCH v15 14/32] x86,fs/resctrl: Add and initialize a resource for package scope monitoring

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Message-ID: <5aebfa53-00d1-4343-906b-b97f6f83837e@intel.com>
Date: Tue, 9 Dec 2025 11:40:06 -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 v15 14/32] x86,fs/resctrl: Add and initialize a resource
 for package scope monitoring

Hi Tony,

On 12/4/25 12:53 PM, Tony Luck wrote:
> Add a new PERF_PKG resource and introduce package level scope for monitoring
> telemetry events so that CPU hot plug notifiers can build domains at the
> package granularity.
> 
> Use the physical package ID available via topology_physical_package_id()
> to identify the monitoring domains with package level scope. This enables
> user space to use:
>  /sys/devices/system/cpu/cpuX/topology/physical_package_id
> to identify the monitoring domain a CPU is associated with.
> 
> Signed-off-by: Tony Luck <tony.luck@...el.com>
> ---

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

Reinette