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Mon, 22 Sep 2025 22:48:33 +0000 Message-ID: <0c110b5f-de24-4ffd-bc9c-3597493bab7d@intel.com> Date: Mon, 22 Sep 2025 15:48:29 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 09/10] fs/resctrl: Introduce interface to modify io_alloc Capacity Bit Masks To: "Moger, Babu" , Babu Moger , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , References: <1cd5f0a7-2478-41b8-97cc-413fa19205dd@intel.com> <7c6a4f7e-e810-4d81-b01d-b0cbf644472f@amd.com> From: Reinette Chatre Content-Language: en-US In-Reply-To: <7c6a4f7e-e810-4d81-b01d-b0cbf644472f@amd.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4P220CA0018.NAMP220.PROD.OUTLOOK.COM (2603:10b6:303:115::23) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|IA1PR11MB6219:EE_ X-MS-Office365-Filtering-Correlation-Id: cbb4de37-01ed-42a4-6b7f-08ddfa2a2873 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|366016|1800799024|921020; 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I also think "bitmask" is usually one word? So: fs/resctrl: Introduce interface to modify io_alloc capacity bitmasks > > The io_alloc feature in resctrl enables system software to configure the > portion of the cache allocated for I/O traffic. When supported, the > io_alloc_cbm file in resctrl provides access to Capacity Bit Masks (CBMs) allocated for I/O devices. > > Enable users to modify io_alloc CBMs via io_alloc_cbm resctrl file when the feature is enabled. (nit) can be made more specific with: Enable users to modify io_alloc CBMs by writing to the io_alloc_cbm resctrl file when the io_alloc feature is enabled. > > Mirror the CBMs between CDP_CODE and CDP_DATA when CDP is enabled to present consistent I/O allocation information to user space and keep both resource types synchronized. I think "and keep both resource types synchronized" is redundant considering the sentence starts with "Mirror the CBMs"? Reinette