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Mon, 21 Jul 2025 23:29:31 +0000 Message-ID: Date: Mon, 21 Jul 2025 16:29:28 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 03/10] x86,fs/resctrl: Detect io_alloc feature To: Babu Moger , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , References: <998f42d5c92cce9d7d83bcd54d25761242839b4a.1752167718.git.babu.moger@amd.com> From: Reinette Chatre Content-Language: en-US In-Reply-To: <998f42d5c92cce9d7d83bcd54d25761242839b4a.1752167718.git.babu.moger@amd.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR04CA0336.namprd04.prod.outlook.com (2603:10b6:303:8a::11) 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_|DM4PR11MB7255:EE_ X-MS-Office365-Filtering-Correlation-Id: 517801d5-b97d-4d45-e2cc-08ddc8ae718d X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024|7416014|7053199007; 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It can reduce the > demands on DRAM bandwidth and reduces latency to the processor consuming > the I/O data. > > Introduce cache resource property "io_alloc_capable" that an architecture > can set if a portion of the cache can be allocated for I/O traffic. > > Set this property on x86 systems that support SDCIAE (L3 Smart Data Cache > Injection Allocation Enforcement). This property is set only for the L3 > cache resource on systems that support SDCIAE. > > Signed-off-by: Babu Moger > --- Reviewed-by: Reinette Chatre Reinette