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Tue, 20 Oct 2026 14:21:16 +0000 Date: Tue, 20 Oct 2026 22:08:19 +0800 From: Chen Yu To: Tony Luck CC: Fenghua Yu , Reinette Chatre , Maciej Wieczor-Retman , Peter Newman , James Morse , Babu Moger , "Drew Fustini" , Dave Martin , "David E Box" , , Christoph Hellwig , , Subject: Re: [PATCH v14 06/24] arm,x86,fs/resctrl: Replace architecture capability helpers with generic versions Message-ID: References: <20261019205031.16977-1-tony.luck@intel.com> <20261019205031.16977-7-tony.luck@intel.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20261019205031.16977-7-tony.luck@intel.com> X-ClientProxiedBy: SI3PR02CA0014.apcprd02.prod.outlook.com (2603:1096:4:295::6) To PH7PR11MB6005.namprd11.prod.outlook.com (2603:10b6:510:1e0::19) X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH7PR11MB6005:EE_|IA0PR11MB8379:EE_ X-MS-Office365-Filtering-Correlation-Id: 8beed5f2-e098-43e5-3225-08df2eb5672c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014|23010399003|56012099006|11063799006|5023799004|4143699003|261009223027099003|10067099003|22082099003|18002099003; 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Each architecture answers this via resctrl_arch_alloc_capable() and > resctrl_arch_mon_capable(). x86 maintains global flags for this in > addition to the per-resource flags and must keep both in sync. MPAM > derives the answer from its per-resource flags. > > The per-resource flags are part of the resource description that the file > system already has, so the architecture helpers duplicate information > available to the file system. > > Define resctrl_alloc_capable() and resctrl_mon_capable() in the file system > based on the per-resource flags and remove the architecture helpers, in > preparation for removing the x86 global flags. The result is unchanged for > MPAM, which presents all monitors on the L3 resource. > > Suggested-by: Reinette Chatre > Signed-off-by: Tony Luck > --- > Since this possible regress window is very small, and I did not find any issue in this change, Reviewed-by: Chen Yu thanks, Chenyu