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Thu, 24 Oct 2024 00:08:34 +0000 Message-ID: Date: Wed, 23 Oct 2024 17:08:31 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 38/40] fs/resctrl: Add boiler plate for external resctrl code 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" , Shaopeng Tan References: <20241004180347.19985-1-james.morse@arm.com> <20241004180347.19985-39-james.morse@arm.com> From: Reinette Chatre Content-Language: en-US In-Reply-To: <20241004180347.19985-39-james.morse@arm.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW3PR06CA0002.namprd06.prod.outlook.com (2603:10b6:303:2a::7) 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_|SA2PR11MB5196:EE_ X-MS-Office365-Filtering-Correlation-Id: d05b7b6d-15ed-4d12-b65b-08dcf3c00084 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016|7416014; 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Examples of such facilities include > + Intel's Resource Director Technology (Intel(R) RDT) and AMD's > + Platform Quality of Service (AMD QoS). > + > + If your system has the necessary support and you want to be able to > + assign tasks to groups and manipulate the associated resource > + monitors and controls from userspace, say Y here to get a mountable > + 'resctrl' filesystem that lets you do just that. > + > + If nothing mounts or prods the 'resctrl' filesystem, resource > + controls and monitors are left in a quiescent, permissive state. > + > + On architectures where this can be disabled independently, it is > + safe to say N. > + > + See for more information. > + > +config RESCTRL_FS_PSEUDO_LOCK > + bool > + help > + Software mechanism to pin data in a cache portion using > + micro-architecture specific knowledge. > + There now seems to be two copies of this ... patch #23 added this exact same "config RESCTRL_FS_PSEUDO_LOCK" snippet to arch/x86/Kconfig > +config RESCTRL_RMID_DEPENDS_ON_CLOSID > + bool > + help > + Enable by the architecture when the RMID values depend on the CLOSID. "Enable by" -> "Enabled by"? > + This causes the closid allocator to search for CLOSID with clean > + RMID. Reinette