linux-kernel - RE: [PATCH 1/2] x86/resctrl: Add io_alloc_min_cbm

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Message-ID: <SJ1PR11MB60831737A75EC2AA1409C944FCC0A@SJ1PR11MB6083.namprd11.prod.outlook.com>
Date: Sat, 8 Nov 2025 00:42:14 +0000
From: "Luck, Tony" <tony.luck@...el.com>
To: Aaron Tomlin <atomlin@...mlin.com>, "Moger, Babu" <bmoger@....com>
CC: "Chatre, Reinette" <reinette.chatre@...el.com>, "Dave.Martin@....com"
	<Dave.Martin@....com>, "james.morse@....com" <james.morse@....com>,
	"babu.moger@....com" <babu.moger@....com>, "tglx@...utronix.de"
	<tglx@...utronix.de>, "mingo@...hat.com" <mingo@...hat.com>, "bp@...en8.de"
	<bp@...en8.de>, "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] x86/resctrl: Add io_alloc_min_cbm_all interface for
 CBM reset

> The intention of this new interface is not to hide lower-level details from
> the administrator, but rather to simplify a specific, high-overhead
> administration task and prevent human error, which I encountered during
> testing of your series.

If you do this often, make a bash script or function to do:

sed -i -e 's/\([0-9][0-9]*\)=\([0-9a-f][0-9a-f]*\)/\1=0/g' /sys/fs/resctrl/info/L3/io_alloc_cbm

[That regex would probably be more readable using extended syntax]

-Tony