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Mon, 3 Nov 2025 19:05:59 +0000 Message-ID: <43506b9c-5ad7-4871-8a24-11e71380321d@intel.com> Date: Mon, 3 Nov 2025 11:05:56 -0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 06/10] fs/resctrl: Add user interface to enable/disable io_alloc feature To: Babu Moger , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , References: From: Reinette Chatre Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW3PR05CA0029.namprd05.prod.outlook.com (2603:10b6:303:2b::34) 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_|SA3PR11MB7626:EE_ X-MS-Office365-Filtering-Correlation-Id: ed269274-b1ba-4e07-b306-08de1b0c066d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|7416014|1800799024; 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See architecture specific notes > + below. Depending on usage requirements the feature can be enabled > + or disabled. > + > + On AMD systems, io_alloc feature is supported by the L3 Smart > + Data Cache Injection Allocation Enforcement (SDCIAE). The CLOSID for > + io_alloc is the highest CLOSID supported by the resource. When > + io_alloc is enabled, the highest CLOSID is dedicated to io_alloc and > + no longer available for general (CPU) cache allocation. When CDP is > + enabled, io_alloc routes I/O traffic using the highest CLOSID allocated > + for the instruction cache (CDP_CODE), making this CLOSID no longer > + available for general (CPU) cache allocation for both the CDP_CODE > + and CDP_DATA resources. > + > Memory bandwidth(MB) subdirectory contains the following files > with respect to allocation: > With the doc formatting fixed: | Reviewed-by: Reinette Chatre Reinette