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[PATCH v11 2/4] mm/page_owner: add NUMA node filter Cc: , , , , , , To: "Zhen Ni" , From: "Zi Yan" X-Mailer: aerc 0.21.0 References: <20260625043101.338794-1-zhen.ni@easystack.cn> <20260625043101.338794-3-zhen.ni@easystack.cn> In-Reply-To: <20260625043101.338794-3-zhen.ni@easystack.cn> X-ClientProxiedBy: YQZPR01CA0186.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:c01:8b::6) To IA0PR12MB8374.namprd12.prod.outlook.com (2603:10b6:208:40e::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PR12MB8374:EE_|PH7PR12MB5781:EE_ X-MS-Office365-Filtering-Correlation-Id: fbe86651-0b56-4d7b-38a0-08ded2efdda5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|23010399003|376014|18002099003|22082099003|3023799007|11063799006|4143699003|56012099006|6133799003; X-Microsoft-Antispam-Message-Info: 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Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: fbe86651-0b56-4d7b-38a0-08ded2efdda5 X-MS-Exchange-CrossTenant-AuthSource: IA0PR12MB8374.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Jun 2026 19:27:59.2161 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: L6ldVT3Wo12MRCdwx9XfgOJd3+XxD7237o7yOvOsDIn29g6d613P2PqaDEkjSsnl X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB5781 X-Rspam-User: X-Stat-Signature: uw8t3699jipwwai4bxrkr7u7zbdquuio X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: BAC40C0009 X-HE-Tag: 1782415684-363465 X-HE-Meta: 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 f6Tyru16 VnGzib6scbpM4gfqm61lCGy4rruBfuRoVYgXWpR04QIc4SsoN8MaWHJ8wd5v+CB6J1d3mnVrQPZ7u8JzycUFvPT2BoRwSHtSCxkJIsosKhQ5ZLOL6fDiDTdAhyy2R92En9vc/I4ywhUL4uV7h55dEycsxSe8zU83t+YtcUkkUQGl5ZbUPXY4pXFJTbuu9H/BshnFDxqRJWBvQsWBWy87iEafdL0s4NreGiDvWVL08Y7UHKT/ckVlP7uXcP7KJQCAkSEOaq8gauUlLSK2bikw8dl7ukZTlWhzFsL/4S6h+dLF3fWS/pTk1Y4NEV1+la8LuFzeujbDF1jHPkFAX0d0yS8lVsXRXKcKyOXHYFvRzDeGr17ebOJj2vinluf5XW5EkPtMt4orY9AAmFSRyVdYECcBzaePXcbwq5PKpFemkbKM4Vgs= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu Jun 25, 2026 at 12:30 AM EDT, Zhen Ni wrote: > Add NUMA node filtering functionality to page_owner to allow filtering > pages by specific NUMA node(s). This is useful for NUMA-aware memory > allocation analysis and debugging. > > The filter supports flexible input formats: > - Single node: nid=3D0 > - Multiple nodes: nid=3D0,2,3 > - Node range: nid=3D0-3 > - Mixed format: nid=3D0,2-4,7 > > Example usage: > # Using the page_owner_filter tool (recommended) > ./page_owner_filter -n 0-3 > ./page_owner_filter -m stack_handle -n 0,2-4,7 > > The implementation uses per-file-descriptor filter state stored in > file->private_data, allowing each opener to have independent filter > configuration. It uses nodemask_t for efficient multi-node filtering and > nodelist_parse() for flexible input parsing. Node validity is verified > using nodes_subset() to reject nodes without memory. > > Signed-off-by: Zhen Ni > --- > =20 > /* > * Maximum input length for filter commands: > - * 32: print_mode command max length is 17 ("mode=3Dstack_handle"). > + * - 32: print_mode command max length is 17 ("mode=3Dstack_handle") > + * with sufficient buffer > + * - 6 * MAX_NUMNODES: worst case for nid list > + * Worst case per node: ",NNNNN" (comma + 5-digit node number) =3D 6 = bytes > */ > - max_input_len =3D 32; > + max_input_len =3D 32 + 6 * MAX_NUMNODES; > =20 > if (count > max_input_len) > return -EINVAL; Hi Andrew, This needs to be fixed as well. --=20 Best Regards, Yan, Zi