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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: ayExkWy5SrzPHTHyNDrmPsDOq/eMic2RxRoHNK5MK/yP/k2u4ylr80idIfErLyYIjV7U/AFK5m7kc2s+I2qD/JReHhWQ5+8WPpcG8JlfApSmjHYH1G7Z+V2GprPgK3Vfc2Y9sVvlodTNneqtRlIvRWW/EM/UBDdL3VADDFVBx84fcjrFNv83gz1jdUc/B76UfW16JxCxyxoXgJMdoGW+GOMQR25aj1F/uN8KEv2YVlrfhQA4MNXXja3ROvPb3I+dLR3mVYbbfw+w4Yx5BWnyEB2WRnsO8A+ldTVoFoMFoldVtmQTKl85gdOPCeFRDmbeW6hq63aVmO7La7p1k3CrjpQ5hsaemwifmdUuCTbCX/Ti3tXYwTOd92ncZBscJBbgfxQutaEw8DEl8T9VniQ1sBPxKFTiKUDUArrIYnju1/LfnE+unwMq0vR/kYpgUB6C X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Aug 2026 10:44:19.6419 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d23c9987-ba27-4266-6d8c-08def927d47f X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: AM3PEPF00009B9D.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB8681 On 13/08/2026 11:20 am, David Hildenbrand (Arm) wrote: > On 7/27/26 11:52, Muhammad Usama Anjum wrote: >> The tmpfile-backed COW cases allocate a one-page file with fallocate() >> before exercising private and shared mappings. When the filesystem >> backing tmpfile() does not implement fallocate(), setup fails with >> EOPNOTSUPP and no COW behavior is exercised. >> >> This occurs when the temporary directory resides on a filesystem with >> limited allocation support, such as NFSv3. Reporting a failure adds >> noise because the test prerequisite is absent rather than the COW >> implementation being broken. >> >> Report EOPNOTSUPP as a skip. Continue treating every other fallocate() >> error as a failure so unexpected setup regressions remain visible. >> >> Tested-by: Sarthak Sharma >> Signed-off-by: Muhammad Usama Anjum >> --- > > Worth a Fixes: ? I think so. Thanks for reviewing! Fixes: f8664f3c4a08 ("selftests/vm: cow: basic COW tests for non-anonymous pages") > > Acked-by: David Hildenbrand (Arm) -- Thanks, Usama