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ryan.roberts@arm.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] selftests: mincore: fix tmpfs mincore test failure Date: Mon, 07 Apr 2025 10:24:32 -0400 X-Mailer: MailMate (2.0r6238) Message-ID: In-Reply-To: <9a00856cc6a8b4e46f4ab8b1af11ce5fc1a31851.1744025467.git.baolin.wang@linux.alibaba.com> References: <9a00856cc6a8b4e46f4ab8b1af11ce5fc1a31851.1744025467.git.baolin.wang@linux.alibaba.com> Content-Type: text/plain X-ClientProxiedBy: MN0PR02CA0014.namprd02.prod.outlook.com (2603:10b6:208:530::19) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|MN6PR12MB8590:EE_ X-MS-Office365-Filtering-Correlation-Id: 45797d99-a377-40e4-3e54-08dd75dfeb5b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7053199007; X-Microsoft-Antispam-Message-Info: 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AHOY2fGa8x3wzkOhpkFRdEN3fawEfLBOSFge1wybi+hDydbStcQdlmUYo9jWVMGWEbkxmHZlzvpUNGh8d7HkcL2eGkdWPgbilhULMiHYr1JsXz77IG3O+MFE/sNecSjltrKk9FVv4e46yypZZKcvBIsVwokVgxW+z6RpcG2LEy7FbMkX/W9J1PrSA3pjt5LG38eDQL+tapSjwoFNhQhjIWXy4mWBRhJdVNn1ZVv+qhv20qZ0Fb8FTg74bvQ082mKOBZu9cA6sZ/VF3C2QjArFKnQ+xef+k9HfruvQzIjIMgV8xWKcU50KO4bQtZmb098mTX1cIr18azvNnyM/J4IeSe2QGb3RoylFkirWONQp87sVfcc+VyFjxuTZWg== 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: On 7 Apr 2025, at 7:31, Baolin Wang wrote: > When running mincore test cases, I encountered the following failures: > > " > mincore_selftest.c:359:check_tmpfs_mmap:Expected ra_pages (511) == 0 (0) > mincore_selftest.c:360:check_tmpfs_mmap:Read-ahead pages found in memory > check_tmpfs_mmap: Test terminated by assertion > FAIL global.check_tmpfs_mmap > not ok 5 global.check_tmpfs_mmap > FAILED: 4 / 5 tests passed > " > > The reason for the test case failure is that my system automatically enabled > tmpfs large folio allocation by adding the 'transparent_hugepage_tmpfs=always' > cmdline. However, the test case still expects the tmpfs mounted on /dev/shm to > allocate small folios, which leads to assertion failures when verifying readahead > pages. > > As discussed with David, there's no reason to continue checking the readahead > logic for tmpfs. Drop it to fix this issue. > > Signed-off-by: Baolin Wang > --- > Changes from v1: > - Drop the readahead logic check, per David. > --- > .../testing/selftests/mincore/mincore_selftest.c | 16 ++-------------- > 1 file changed, 2 insertions(+), 14 deletions(-) > Acked-by: Zi Yan -- Best Regards, Yan, Zi