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Thu, 18 Dec 2025 23:00:16 +0000 Message-ID: Date: Thu, 18 Dec 2025 14:59:59 -0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/3] x86/resctrl: Add "*" shorthand to set minimum io_alloc CBM for all domains To: "Luck, Tony" , "Moger, Babu" , "Aaron Tomlin" , "Dave.Martin@arm.com" , "james.morse@arm.com" , "babu.moger@amd.com" , "tglx@linutronix.de" , "mingo@redhat.com" , "bp@alien8.de" , "dave.hansen@linux.intel.com" CC: "sean@ashe.io" , "linux-kernel@vger.kernel.org" References: <20251215230257.1798865-1-atomlin@atomlin.com> <20251215230257.1798865-4-atomlin@atomlin.com> <95d219be-c89b-431a-974a-2e2b653f98e4@amd.com> Content-Language: en-US From: Reinette Chatre In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0226.namprd03.prod.outlook.com (2603:10b6:303:b9::21) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|SJ0PR11MB6744:EE_ X-MS-Office365-Filtering-Correlation-Id: 8d428ec4-ebc7-4dd5-36d4-08de3e89354c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|1800799024|376014|366016|921020; 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The same simple change could apply to parse_line() to allow > setting all domains in a resource to be set to the same value: > > # echo "L3:*=fff" > schemata > > # echo "MB:*=50" > schemata If I remember correctly the idea was to limit this feature to io_alloc to avoid needing to deal with L2 asymmetric domains [1]. Reinette [1] https://lore.kernel.org/lkml/SJ1PR11MB60833A27A1B8057CDDFB1B2BFCCFA@SJ1PR11MB6083.namprd11.prod.outlook.com/