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Thu, 7 May 2026 00:56:28 -0700 From: Cosmin Ratiu To: CC: David Ahern , Ido Schimmel , Kuniyuki Iwashima , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Simon Horman , Paolo Abeni , Cosmin Ratiu Subject: [PATCH net-next v3 0/3] ipv4: Flush the FIB once on multiple nexthop removal Date: Thu, 7 May 2026 10:56:03 +0300 Message-ID: <20260507075606.322405-1-cratiu@nvidia.com> X-Mailer: git-send-email 2.53.0 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-ClientProxiedBy: rnnvmail203.nvidia.com (10.129.68.9) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ5PEPF00000207:EE_|SJ2PR12MB7917:EE_ X-MS-Office365-Filtering-Correlation-Id: 7598d5e8-8922-4bfc-e46a-08deac0e3009 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|376014|1800799024|82310400026|13003099007|18002099003|56012099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700016)(376014)(1800799024)(82310400026)(13003099007)(18002099003)(56012099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: Ho8sUIvwbr7tQKIMjewHUrAn5T0O4jFRvx3eOl/rfkIf1RE13P4ME3T0PeUrXoCkEizkrwW/2LjXaN0449DK8qAFbuCMFjdKOSJUKvFQYJyXKi+dRdf0zvm8zKwMz90fn7dL+sRMHrIrhaxg5tLbpxyn1ZglhXFNEYy55wq1xyCr01pAMlyZD7Qsy8oHfu7FSd2AF10OEcSeGE8D3DH2Zu+zHTX7Eq9sso6p16xqMkxTkVNiIzPXjyoA945IBbWrWuI/WGm7peF0pd7KfxQZENvcUJ53UW/+SfoKptU5wM4kytfQdSrtDs7xHvLV1cuNogqow3kWftVojt5MQgQv/7oAXcm3eh/GqpykPBwfxaoNLdan7qAgVWAXaDEDxrE2U6Lt8YgOKg3M098uFVr9qHZbT1SmBj+oax2S1EiKWC033foQzD2lcwjcoiaeAzjk X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 May 2026 07:56:46.8310 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7598d5e8-8922-4bfc-e46a-08deac0e3009 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF00000207.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB7917 This series optimizes multiple nexthop removal performance from having to do a FIB flush for each nexthop being removed to only doing a single FIB flush after all nexthops are removed. This dramatically improves performance in scenarios where there are many nexthops and many ipv4 routes. Please see individual patches for more details and for a test scenario. V2 -> V3: https://lore.kernel.org/netdev/8fea4084-c9ec-472a-b8ab-ecc87e537216@kernel.org/T/#t - Split the patch into 3 (Ido Schimmel, David Ahern) - Used WARN_ON_ONCE instead of WARN_ON (Ido Schimmel) V1 -> V2: - Fixes xmas tree in a couple places (Kuniyuki Iwashima) - Added __must_check to remove_nexthop_from_groups() (Kuniyuki Iwashima) Cosmin Ratiu (3): ipv4: Provide a FIB flushing signal from nexthop removal functions ipv4: Flush the FIB once on multiple nexthop removal ipv4: Add __must_check to nexthop removal functions net/ipv4/nexthop.c | 88 +++++++++++++++++++++++++++++----------------- 1 file changed, 56 insertions(+), 32 deletions(-) -- 2.53.0