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Mar 2024 21:05:37 +0000 Date: Thu, 7 Mar 2024 13:05:30 -0800 From: Dan Williams To: Jane Chu , , , CC: Linux-MM Subject: Re: Barlopass nvdimm as MemoryMode question Message-ID: <65ea2c1a441d_12713294d9@dwillia2-mobl3.amr.corp.intel.com.notmuch> References: Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: MW4P220CA0019.NAMP220.PROD.OUTLOOK.COM (2603:10b6:303:115::24) To PH8PR11MB8107.namprd11.prod.outlook.com (2603:10b6:510:256::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH8PR11MB8107:EE_|SA1PR11MB6805:EE_ X-MS-Office365-Filtering-Correlation-Id: a44f70e4-7cf7-45f7-2f7d-08dc3eea5656 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; X-Microsoft-Antispam-Message-Info: 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7fsq/+1ohKF2iInmGBQZhnFmlDIWuoYNvcqRydShPU2XfmuLj6YG2rs2iadY9s7m94LgUuV21clnRcDM2IHiDUDY4HGCQhzlbQj/5LhXhJd5YYAIaK3JkfeFN+7U+GTz5Hv5ucyzsgiex6RLJCNrNMwSmlIrnu3VdVOvVwnG9SHIGasJ/qQob0DxuwzGkxYC44mga+oPRbZrAAlEpILq1GphV9Kd2ZulNKm95WSHZ4F9gdwE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Jane Chu wrote: > Hi, Dan and Vishal, > > What kind of NUMAness is visible to the kernel w.r.t. SysRAM region > backed by Barlopass nvdimms configured in MemoryMode by impctl ? As always, the NUMA description, is a property of the platform not the media type / DIMM. The ACPI HMAT desrcibes the details of a memory-side-caches. See "5.2.27.2 Memory Side Cache Overview" in ACPI 6.4.