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Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Shuah Khan , linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 7.2 v2 08/12] mm/huge_memory: remove folio split check for READ_ONLY_THP_FOR_FS Date: Mon, 13 Apr 2026 16:46:54 -0400 X-Mailer: MailMate (2.0r6290) Message-ID: In-Reply-To: References: <20260413192030.3275825-1-ziy@nvidia.com> <20260413192030.3275825-9-ziy@nvidia.com> Content-Type: text/plain X-ClientProxiedBy: MN0P222CA0017.NAMP222.PROD.OUTLOOK.COM (2603:10b6:208:531::22) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|CH3PR12MB8727:EE_ X-MS-Office365-Filtering-Correlation-Id: b16c8b50-d26b-4b46-5b94-08de999dcf03 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014|22082099003|56012099003|18002099003; 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Or do we just skip > adding order-1 file folios to the deferred split list? Either way, order <= 1 folios are not added to deferred split list. See deferred_split_folio(). IIUC, we have order-1 file folios but not order-1 anon folios. > we need to correct _something_, whether it's the code or the comment. > >> + if (folio_test_anon(folio) && new_order == 1) >> + return -EINVAL; Best Regards, Yan, Zi