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Wed, 14 Aug 2024 04:00:47 +0000 Message-ID: <72e612b3-0840-4cbf-b5fb-85ed3be4cfc8@intel.com> Date: Tue, 13 Aug 2024 21:00:44 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 08/39] x86/resctrl: Generate default_ctrl instead of sharing it To: James Morse , , CC: Fenghua Yu , Thomas Gleixner , Ingo Molnar , Borislav Petkov , H Peter Anvin , Babu Moger , , D Scott Phillips OS , , , , , , Jamie Iles , Xin Hao , , , , David Hildenbrand , Rex Nie , "Dave Martin" References: <20240802172853.22529-1-james.morse@arm.com> <20240802172853.22529-9-james.morse@arm.com> From: Reinette Chatre Content-Language: en-US In-Reply-To: <20240802172853.22529-9-james.morse@arm.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR04CA0124.namprd04.prod.outlook.com (2603:10b6:303:84::9) 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_|SA2PR11MB4955:EE_ X-MS-Office365-Filtering-Correlation-Id: b7b90067-8694-4aed-e962-08dcbc15ad91 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|7416014|366016; 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> + case RESCTRL_SCHEMA_PERCENTAGE: > + return 100u; > + case RESCTRL_SCHEMA_MBPS: > + return r->membw.max_bw; > + } > + > + return WARN_ON_ONCE(1); > +} > + I am concerned where this is headed. Since RESCTRL_SCHEMA_PERCENTAGE remains in use when resctrl is mounted with mba_MBps the default cannot always be 100u (it should be MBA_MAX_MBPS when software controller is active). Reinette