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Fri, 3 Apr 2026 02:09:56 -0700 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Mark Bloch , "Alexei Starovoitov" , Daniel Borkmann , "Jesper Dangaard Brouer" , John Fastabend , Stanislav Fomichev , Dragos Tatulea , Cosmin Ratiu , Simon Horman , "Jacob Keller" , Lama Kayal , "Michal Swiatkowski" , Carolina Jubran , Nathan Chancellor , Daniel Zahka , Rahul Rameshbabu , "Raed Salem" , , , , , Gal Pressman Subject: [PATCH net-next V2 0/5] net/mlx5e: XDP, Add support for multi-packet per page Date: Fri, 3 Apr 2026 12:09:22 +0300 Message-ID: <20260403090927.139042-1-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE31:EE_|MN0PR12MB5860:EE_ X-MS-Office365-Filtering-Correlation-Id: 0961851d-22c0-4389-96fc-08de9160d3f7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700016|376014|7416014|1800799024|18002099003|56012099003|13003099007; X-Microsoft-Antispam-Message-Info: 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 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)(82310400026)(36860700016)(376014)(7416014)(1800799024)(18002099003)(56012099003)(13003099007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 6nl4ZT1caQ3u4mmeEl+PhkWUWvxjIIdH0Lx+g6DB1m4/1gFtXbi8bWnvB8L4EEphDNI7rr1rOUPftLKsh6hevXp2RWlwSlKWMlyHySlCYfwDRMzct4IZc0qBMwiRPPyataB14JZuv+gm9LGUD7jVJHGZ9ilwxX+qSHfcVbr8cszeOD7sCLNT1F/4jnGTbX/LtsZKnzU0X1qByDN45L3zOD0qfssPPboRt0YjIIup7EjmaL875kOIymlqSodq/Yl3Yu7BeYGjXW+kZI5PBXH5IWGY40Y9SEiapipDUD3s450mGBDtwn3Hoskp7BAEzfEjfJXJv5DI4p+lZJ9M62h3Rpd4qX4Y3/6uY/LpKh1IZH374GTS76D9cr2uHTVSfoKBjlIWfQXVwZWGN4N+Vo48u7+S94askNXJttxGoG8pT0h6ZKvm3fNEUTxi1aZdo2lh X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Apr 2026 09:10:19.1434 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0961851d-22c0-4389-96fc-08de9160d3f7 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: CY4PEPF0000EE31.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5860 Hi, This series removes the limitation of having one packet per page in XDP mode. This has the following implications: - XDP in Striding RQ mode can now be used on 64K page systems. - XDP in Legacy RQ mode was using a single packet per page which on 64K page systems is quite inefficient. The improvement can be observed with an XDP_DROP test when running in Legacy RQ mode on a ARM Neoverse-N1 system with a 64K page size: +-----------------------------------------------+ | MTU | baseline | this change | improvement | |------+------------+-------------+-------------| | 1500 | 15.55 Mpps | 18.99 Mpps | 22.0 % | | 9000 | 15.53 Mpps | 18.24 Mpps | 17.5 % | +-----------------------------------------------+ After lifting this limitation, the series switches to using fragments for the side page in non-linear mode. This small improvement is at most visible for XDP_DROP tests with small 64B packets and a large enough MTU for Striding RQ to be in non-linear mode: +----------------------------------------------------------------------+ | System | MTU | baseline | this change | improvement | |----------------------+------+------------+-------------+-------------| | 4K page x86_64 [1] | 9000 | 26.30 Mpps | 30.45 Mpps | 15.80 % | | 64K page aarch64 [2] | 9000 | 15.27 Mpps | 20.10 Mpps | 31.62 % | +----------------------------------------------------------------------+ This series does not cover the xsk (AF_XDP) paths for 64K page systems. [1] https://lore.kernel.org/all/20260324024235.929875-1-kuba@kernel.org/ V2: - Link to V1: https://lore.kernel.org/all/20260319075036.24734-1-tariqt@nvidia.com/ - Fixed issue found by AI review [1]. Dragos Tatulea (5): net/mlx5e: XSK, Increase size for chunk_size param net/mlx5e: XDP, Improve dma address calculation of linear part for XDP_TX net/mlx5e: XDP, Remove stride size limitation net/mlx5e: XDP, Use a single linear page per rq net/mlx5e: XDP, Use page fragments for linear data in multibuf-mode drivers/net/ethernet/mellanox/mlx5/core/en.h | 12 +++- .../ethernet/mellanox/mlx5/core/en/params.c | 11 +--- .../ethernet/mellanox/mlx5/core/en/params.h | 2 +- .../net/ethernet/mellanox/mlx5/core/en/xdp.c | 2 +- .../net/ethernet/mellanox/mlx5/core/en_main.c | 50 ++++++++++++-- .../net/ethernet/mellanox/mlx5/core/en_rx.c | 65 +++++++++++++++---- 6 files changed, 113 insertions(+), 29 deletions(-) base-commit: 8b0e64d6c9e7feec5ba5643b4fa8b7fd54464778 -- 2.44.0