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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: [PATCH v1 05/10] mm/huge_memory: remove READ_ONLY_THP_FOR_FS from file_thp_enabled() Date: Thu, 26 Mar 2026 21:42:50 -0400 Message-ID: <20260327014255.2058916-6-ziy@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260327014255.2058916-1-ziy@nvidia.com> References: <20260327014255.2058916-1-ziy@nvidia.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BL1PR13CA0153.namprd13.prod.outlook.com (2603:10b6:208:2bd::8) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) 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: DS7PR12MB9473:EE_|LV8PR12MB9264:EE_ X-MS-Office365-Filtering-Correlation-Id: 87d06398-3d63-43fa-2cf1-08de8ba23454 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014|18002099003|56012099003|22082099003; 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charset="utf-8" Replace it with a check on the max folio order of the file's address space mapping, making sure PMD_ORDER is supported. Signed-off-by: Zi Yan --- mm/huge_memory.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index c7873dbdc470..1da1467328a3 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -89,9 +89,6 @@ static inline bool file_thp_enabled(struct vm_area_struct= *vma) { struct inode *inode; =20 - if (!IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS)) - return false; - if (!vma->vm_file) return false; =20 @@ -100,6 +97,9 @@ static inline bool file_thp_enabled(struct vm_area_struc= t *vma) if (IS_ANON_FILE(inode)) return false; =20 + if (mapping_max_folio_order(inode->i_mapping) < PMD_ORDER) + return false; + return !inode_is_open_for_write(inode) && S_ISREG(inode->i_mode); } =20 --=20 2.43.0