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Miller" , "Eric Dumazet" , Jakub Kicinski , "Simon Horman" , Donald Hunter , "Andrew Lunn" , Shuah Khan , "Willem de Bruijn" , , , , Subject: Re: [PATCH v3 net-next 10/10] selftests: net: tests for add double tunneling GRO/GSO Date: Thu, 15 Jan 2026 11:13:30 +0100 In-Reply-To: <551e2839d870351c34f656530bfd5865b9b131bc.1768410519.git.pabeni@redhat.com> Message-ID: <871pjr6t08.fsf@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-ClientProxiedBy: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF00005FFC:EE_|LV3PR12MB9093:EE_ X-MS-Office365-Filtering-Correlation-Id: eba40d8f-6867-495e-0b16-08de542547cc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|7416014|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?03yY9kmo0GiJhlgp+U/cvKTg/97IE7HgASfcSR5ZjK21sRDBUfnJSbH+ODfF?= =?us-ascii?Q?jFqFYvrVnKSvp4G1gfajnjv9tQQa0Gl+oO+lsg8fth7ZOIBwZUs4VQb03hNw?= =?us-ascii?Q?zFrE2ZHqeQynCm+GkHfK3teg01U3jYmDYLry2NchfkgVGE/Xxb/eq94Z3C3x?= =?us-ascii?Q?nzjV08l8KGe/vBFg2kWf/VU0ByaXPQbYDq80/SUx/4DUArhlL70gsS5/L2+m?= =?us-ascii?Q?S89eIa9laH0N+fD4gpXu+ee4wEiyLspya8UmC30eetZPTlSVNQzLjtwCXoEk?= =?us-ascii?Q?r2bZPeGisU6t/WyslKthLtXOuuOfN2KWeouVOUHdFH8sTKlJTIjS2jbvey5O?= =?us-ascii?Q?Xz3klTJpHg6xQ+Ff38fIvb0lxh9fhCBBPrz/7K54YyDVOoee91mMuMKaSJAZ?= =?us-ascii?Q?s+a1Zo7M2a0Yb8bj38rGjVKex0tAOU6Jv/Wg8+BMVGThShiEF94wqBs9jTgm?= =?us-ascii?Q?4o6y7SVAoov4iR9D+swDizDT1tMKvVM5HHk5xoKHVSGLg0MxYe6DBYEhRled?= =?us-ascii?Q?DOyRrcQwy9eRR1aFMkHgHH4E5cnZACFgrdg0zVyAo5EAQUBHE7ZiYxS+wI9X?= =?us-ascii?Q?jOm0y9YMSrmm9lpgKGuEmfrdzLA13P4EU1SxT0k+ndmzUaNkR4PlaEVgdSPM?= =?us-ascii?Q?DsRrIfS/+HZ6qeULjoyXvH5S+V7HQg7nHYnTUnZzAZVDdDecokZryHheH923?= =?us-ascii?Q?QNatZhUnlCEEyQEXdwEzRobdA9SMicDy0EUyN0nZIwSnjf8dxEkpW1w3Dnyr?= =?us-ascii?Q?u1rX31Tszo5giqRkPLXJe/SE+OmTFliKVfd+bCK6SNwu9imlNnJTxtuCBPGy?= =?us-ascii?Q?NX8PR6m2oC0og9eRBPRReNm0ScG4q3xzDJYM66dOUEGFl2zi71QirMoFOOxr?= =?us-ascii?Q?leEGa4X1ae+IwSQ7tr7uCawYfYyOpHg8LWP+yzoEUuaNnnWb5iY7clSL5b9i?= =?us-ascii?Q?O2nsXm4OFECatOoiE7URtFtgAT37z67v9rCDaLblq5KmupboFmoILC4JPCIG?= =?us-ascii?Q?l9KPDRujcJVJ7EunIHhoB+p4zNdCVrrkOl7l19ik2vJ5AeL9MCqZp7LB9sk/?= =?us-ascii?Q?2DQvzGjZU+s45d/JO15SQLSLy0poiklvrlIm6zcNMoT7gotdN1+FF38GOOLX?= =?us-ascii?Q?f2EiSjLor0AD0weGKNBP4ftTPmVmeNocROlWBtu+sQvbO35Ut8FJrHBTU9FJ?= =?us-ascii?Q?1CjNrJg8LxiOu8HIN88mr2JJR6AuZE+clQ4/Qy+dliuh02cfG/ChuYgjkgxI?= =?us-ascii?Q?nr5elyjJjT/82R06KQxdEjwjdKJ7BYdEZKzvFtF00suXcPq7+19t53SxX1yN?= =?us-ascii?Q?t5jIBY+F6Z3/uRC4Hv3M7eJ4hZ/wib+d8mpYuARW+5pd/XcxXrAJNgPEC7/V?= =?us-ascii?Q?BEidkZdpQY9ZBiBy98ewmhaxEGeQuyw+bvW1x/oN3XAQXzlL99PDBN5zvfaV?= =?us-ascii?Q?XqYKf9U4JHwxOV4k1pZqsLa/QAeBI/4mO4JvCyuIDZ/MQcDKzECL3dAgxmm4?= =?us-ascii?Q?qsEiHTohk3Z5/X6EfZK1YXFv00r/3cb9EbrW32PPXElCoT7gJGr6CphPMYqU?= =?us-ascii?Q?W1CPqh2XAivcSPA/zKDRKrNGL5tZAQFsKXkizOz8lcUfWiXWCTQdVCpmTQsb?= =?us-ascii?Q?wU491IR2mXWXs6JqajpQfTU7+39mhgUZf0bLGtDOoMJbJoR7vR66HyTuHmDf?= =?us-ascii?Q?N8G7ng=3D=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(376014)(7416014)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jan 2026 11:00:22.6400 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: eba40d8f-6867-495e-0b16-08de542547cc X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF00005FFC.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR12MB9093 Paolo Abeni writes: > Create a simple, netns-based topology with double, nested UDP tunnels and > perform TSO transfers on top. > > Explicitly enable GSO and/or GRO and check the skb layout consistency with > different configuration allowing (or not) GSO frames to be delivered on > the other end. > > The trickest part is account in a robust way the aggregated/unaggregated > packets with double encapsulation: use a classic bpf filter for it. > > Signed-off-by: Paolo Abeni Looks OK overall, just: > diff --git a/tools/testing/selftests/net/double_udp_encap.sh b/tools/testing/selftests/net/double_udp_encap.sh > new file mode 100755 > index 000000000000..055f65b4d18d > --- /dev/null > +++ b/tools/testing/selftests/net/double_udp_encap.sh > +# tcp retransmisions will break the accounting > +[ "$KSFT_MACHINE_SLOW" = yes ] && FAIL_TO_XFAIL=yes You should just be able to call `xfail_on_slow' without an argument to apply the setting globally. Selftests shouldn't have to touch FAIL_TO_XFAIL directly.