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Sun, 3 May 2026 13:27:54 -0700 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Leon Romanovsky , Jason Gunthorpe , "Saeed Mahameed" , Tariq Toukan , Mark Bloch , Shay Drory , Or Har-Toov , Edward Srouji , Simon Horman , Maher Sanalla , Parav Pandit , Patrisious Haddad , Kees Cook , Gerd Bayer , Moshe Shemesh , Carolina Jubran , Cosmin Ratiu , , , , Gal Pressman , Dragos Tatulea Subject: [PATCH net-next V3 2/7] net/mlx5: E-Switch, let esw work callers choose GFP flags Date: Sun, 3 May 2026 23:27:21 +0300 Message-ID: <20260503202726.266415-3-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260503202726.266415-1-tariqt@nvidia.com> References: <20260503202726.266415-1-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@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: BN1PEPF00005FFD:EE_|PH8PR12MB6841:EE_ X-MS-Office365-Filtering-Correlation-Id: d40511c2-dcbe-4120-e060-08dea9527938 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|36860700016|82310400026|56012099003|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: 7oVjMYdjvnDeThwOxkwC//xEbX59MpBZ/J9P1566/wvimfkppqappsPvy/dfEK6ttU2s2I/1hf31HR3rboVnbvzfoiKgWO8RbZCzA756D8M5IL5Knm5I46uueObnfQAykRY/sM4A3ekHNxf2ZGEiyjzEsrVOs7dHBG6X/RukLLEPG6kgyziKLbR/LAC1HcnApKLS5wtVm9YUDCeB94Z42b1bNH0wA7hIUW8QwmJI2Ys0g7+5ndHxa55VHKQEaNMALJwHEVaJrui3Ceola5zLOsmxBd4TuscvpVvDoByszL1Cn8ql7se+2uzGsSpNRo2Es5urhkxJuWw+64HCCxb60zRNn+hDbHwo9K2K082bM5QOBRTQeOjaJOhYS/MRk/qY78bZQV75q8/kn4pXcMOKqXqgnPp2AZyGkjjuY084ZDGvI2X/QKZ5/PY0bfPUxUzweM7s2wYoPpeWHBjtq4f8UubSsiEaGqhmS/IgcnEi4SCYsQ5/qUC7yOJfevcLmOeQepdU8JRXJGYR6HBjDvei30PVgrA6n4LSSeEx+hqWiO1w9p5ljJmEZWslit97bXOWN/sAZyZKTIoKsoRkYn6iwinhQjd8GuUOgWGzz3zYonSNc9tDUvFZ1kK9loxxo0+rikIigtFE6779N0mf1BDXVxHsof9Ee79dqYp6z7kFkAyYcuIfjvGkD6528ToF145UpePfJxdzB6y7ly2c0lsP4qjDS2dAl64E4irc/gmaeeY= X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(36860700016)(82310400026)(56012099003)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: JPjvWHLeN06C7v0TWlw8U7uwpjd+uApxKXnTaw8Gap2JQnhvlq54UPdFirKF+VxzoLFYaT4jc8vAxe3N2bgj7QTnVKL8kJvcvIgxSprtbYMsiaQm8ehzZIw/cgcGdE1Rf0QN5KewJgRHGnR1YIEyOy4lK5ZHi8i5wJoU5uyVbfobMwCMfW4Ad1OBZT+VV1/fMGpFDByilGcITLSfEmXDlbEOf2j5vSdtrzd7SNVRtz2i2AXgXj5dhJCTsH6CLXTAFW5KxTj6v66DvJmZ7o8Yr7H2nlavfaK/rsmfbA1hnXSj9drek8mQdnQXyjuI9B3buk8tH5jQntJ1J9NVmcWoeUAmmeTc/zVOAq5bKLdh+bx21vlK5r7BEpbPlPVDeNVGxSkQbX1OekeEQ1+sQLGfm3inRIFRkWqx/9QcymVWUSdnr91U0W9aaetUcnuNH6qJ X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 May 2026 20:28:01.7441 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d40511c2-dcbe-4120-e060-08dea9527938 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF00005FFD.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6841 From: Mark Bloch mlx5_esw_add_work() always allocates the queued work item with GFP_ATOMIC. That is required for the E-Switch functions-change notifier, but not every caller of this helper will run from atomic context. Pass an allocation flag to mlx5_esw_add_work() and keep the notifier caller using GFP_ATOMIC. This allows sleepable callers to use GFP_KERNEL instead of unnecessarily relying on atomic reserves. Signed-off-by: Mark Bloch Signed-off-by: Tariq Toukan --- .../net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c index 69ddf56e2fc9..69134ce2a908 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c @@ -3736,11 +3736,12 @@ static void esw_wq_handler(struct work_struct *work) } static int mlx5_esw_add_work(struct mlx5_eswitch *esw, - void (*func)(struct mlx5_eswitch *esw)) + void (*func)(struct mlx5_eswitch *esw), + gfp_t gfp) { struct mlx5_host_work *host_work; - host_work = kzalloc_obj(*host_work, GFP_ATOMIC); + host_work = kzalloc_obj(*host_work, gfp); if (!host_work) return -ENOMEM; @@ -3764,7 +3765,8 @@ int mlx5_esw_funcs_changed_handler(struct notifier_block *nb, esw_funcs = mlx5_nb_cof(nb, struct mlx5_esw_functions, nb); esw = container_of(esw_funcs, struct mlx5_eswitch, esw_funcs); - ret = mlx5_esw_add_work(esw, esw_vfs_changed_event_handler); + ret = mlx5_esw_add_work(esw, esw_vfs_changed_event_handler, + GFP_ATOMIC); if (ret) return NOTIFY_DONE; -- 2.44.0