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{ "id": 2230232, "url": "http://patchwork.ozlabs.org/api/1.1/covers/2230232/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/cover.1777468631.git.alessio.faina@canonical.com/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/1.1/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<cover.1777468631.git.alessio.faina@canonical.com>", "date": "2026-04-29T13:57:19", "name": "[SRU,N:linux-bluefield,0/1] Revert performance sinking conntrack patch", "submitter": { "id": 91694, "url": "http://patchwork.ozlabs.org/api/1.1/people/91694/?format=api", "name": "Alessio Faina", "email": "alessio.faina@canonical.com" }, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/cover.1777468631.git.alessio.faina@canonical.com/mbox/", "series": [ { "id": 502067, "url": "http://patchwork.ozlabs.org/api/1.1/series/502067/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=502067", "date": "2026-04-29T13:57:19", "name": "Revert performance sinking conntrack patch", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502067/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2230232/comments/", "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=hVwhD1Rk;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g5Jlf5W6Pz1yK5\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 29 Apr 2026 23:57:34 +1000 (AEST)", "from localhost ([127.0.0.1] helo=lists.ubuntu.com)\n\tby lists.ubuntu.com with esmtp (Exim 4.86_2)\n\t(envelope-from <kernel-team-bounces@lists.ubuntu.com>)\n\tid 1wI5Po-0001kc-6N; Wed, 29 Apr 2026 13:57:24 +0000", "from smtp-relay-internal-1.internal ([10.131.114.114]\n helo=smtp-relay-internal-1.canonical.com)\n by lists.ubuntu.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.86_2) (envelope-from <alessio.faina@canonical.com>)\n id 1wI5Pn-0001kU-1c\n for kernel-team@lists.ubuntu.com; Wed, 29 Apr 2026 13:57:23 +0000", "from mail-wr1-f69.google.com (mail-wr1-f69.google.com\n [209.85.221.69])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by smtp-relay-internal-1.canonical.com (Postfix) with ESMTPS id D94163F918\n for <kernel-team@lists.ubuntu.com>; Wed, 29 Apr 2026 13:57:22 +0000 (UTC)", "by mail-wr1-f69.google.com with SMTP id\n ffacd0b85a97d-43cfedb10a8so8302128f8f.1\n for <kernel-team@lists.ubuntu.com>; Wed, 29 Apr 2026 06:57:22 -0700 (PDT)", "from localhost (93-35-127-183.ip55.fastwebnet.it. [93.35.127.183])\n by smtp.gmail.com with ESMTPSA id\n ffacd0b85a97d-447b4216ecasm6045730f8f.14.2026.04.29.06.57.20\n for <kernel-team@lists.ubuntu.com>\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Wed, 29 Apr 2026 06:57:21 -0700 (PDT)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com;\n s=20251003; t=1777471042;\n bh=ttaOJhwqdcTudFnJcekLe9ecVufrDhPqeeZQ0t04fwg=;\n h=From:To:Subject:Date:Message-ID:MIME-Version;\n b=hVwhD1RkmNQycCB1UcD6RAg926oUdzrwlGSzuQGYB+yVWU6yV+T7KmeaQ50dxQpJe\n 9VJlu5ZRcROHbdhk4Jn6LA+0pqPbQWR1X6NtKTCbJx5wTS89IcZ/jco1dD9dUaAlC+\n iDAbRw46mSjXCJGMPPwQ/6zM4D3yZJI8fVsvQzZ8RZI1MCsLBbxLnr2F1Di0eUw5cw\n 9DsFh1zNSLp8V9DEg3XGCJ/B9lJOMFN0oWHHbAMcilFYIPqvAdhxIXrivnF56sYUU2\n JFHk27xKMzApDubn1KQoazJzrYPZN+amn7KIIj5/Jpg5OXJgsKIkxJdQ8wCU9pcItB\n 0SGWwqrVnIgZY4HhnrdGS80v8qhDg3L2b2hcBVAJcLC8wssVPz8CuzAByVHNFyXrKD\n UX0oKs2pu9tQUn8BTE3E8n10J4wIFzWIUxFs3BmYUzsW5eeK8AxtHnqiEEMKpvcphi\n rZVhULF0D6VcpLuKVzQO22G96QBUZn8SdW3y4q8amJS2qWvwPiHkUlqYSUnwKJ2FO1\n nPOzufgFI6KayD6JSTioG31T++e5lQuBlh+dB6ul20I7ZIL5zmcm3cvQMMT+Cxj+Mi\n IT5PGQzj7ZJiQH/hI67FFvmVrhinZz+/Up3V1YuhKZ7WFWqx6ZWAIaPBKk/9QvZAcd\n igTbR+4CdD3X4MG23ciTklBg=", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20251104; t=1777471042; x=1778075842;\n h=content-transfer-encoding:mime-version:message-id:date:subject:to\n :from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id\n :reply-to;\n bh=ttaOJhwqdcTudFnJcekLe9ecVufrDhPqeeZQ0t04fwg=;\n b=bo+Or2WeMtzR1K4gehI3Jciwu8pc1bMr1zXRkYJSHimsnzNSoegtzZLnN3dZ50+Ol6\n WTTXZorJmHbigfjg24P1B7soRHZiv93qTWLDUmMR5m9OQS+0fFxA2Hx1vGuuMCQrtjwz\n OF/nQ9e8BsScqgYvhsXSeVj3qHF8UxnASwzkidcZ2xAlNrRsY/FJMzE56pSDnLuIZB2O\n Y7BScq7MQO/S74DxCz+trpHhORg5ju9OrtR7DKJJgGgmpOThj47XLzAgPxIAX2d5jLWi\n s+TQSH+2zp2HvkkrXtMS9s71zk3cNqjxst+5jVUdCLh49JJt77SB2evyFU9uwsk3iPX5\n 7IXw==", "X-Gm-Message-State": "AOJu0YzrAzMzrEz9T2i62QPUbG1+c2uCSBOvHHmfCHggpThSDudED8fR\n E6g+76yVy2oJYsPFupb3LZhTb2u59SLmq4uA8Xdqj6EYz21o697F1nY23fwY9ebGPUkALnDh0Od\n t2rdu8/SQG3GT2sO2tSyoqlWpY7kK3qYLxMq3oJuzhJ3RSgrwNbbuL5s5QGObo8Ek5LCnSNw5tG\n iwWplCfXbM9zEBZw==", "X-Gm-Gg": "AeBDievIiVgJy0WO/CJJrmPQx0F2XrLqGlVL8QQP/S0XBJkLgi2/B1sd0/m5vjciscy\n YgmAWj9+SezdyxW58JUuzeyFRsQ+yJXCZ5pXcxICVAp09F/RSKFWqDIInl+7BSKzs5GyoBbpH5X\n 54b5ImJ0xugY45mQqeErL86G4Ldg0axW/oPIrsrUx/5kvOi/eDSkkKRQeTcWKqJhO/QMrpjHpUF\n DSY0SDzRycOgBMjAQtjTuUGYEifHQ2I0lS4Ye/Aco/XeOAQNz0cn3BHrKGNV6zWmctym90kmApw\n w7CQ6zoADGVI+nwPTleNh6buBsCl49woweH/qCnALJgmyhkFL6lpjxkBCOLtFqz5+gqM/iWHmSu\n /51gCVXEnqqu52U1AQ+2iPfcGTLxvuig0IAAP5wnpx7zRbB6Cc0x/m4+BDrUZiegQFtyYQ9++Yt\n s8OlAT2vpoqv+MbDPpN+5vTP9Qr8KQ7A==", "X-Received": [ "by 2002:adf:e748:0:b0:448:659b:abec with SMTP id\n ffacd0b85a97d-448659bae87mr1902852f8f.8.1777471042355;\n Wed, 29 Apr 2026 06:57:22 -0700 (PDT)", "by 2002:adf:e748:0:b0:448:659b:abec with SMTP id\n ffacd0b85a97d-448659bae87mr1902821f8f.8.1777471041691;\n Wed, 29 Apr 2026 06:57:21 -0700 (PDT)" ], "From": "Alessio Faina <alessio.faina@canonical.com>", "To": "kernel-team@lists.ubuntu.com", "Subject": "[SRU][N:linux-bluefield][PATCH 0/1] Revert performance sinking\n conntrack patch", "Date": "Wed, 29 Apr 2026 15:57:19 +0200", "Message-ID": "<cover.1777468631.git.alessio.faina@canonical.com>", "X-Mailer": "git-send-email 2.43.0", "MIME-Version": "1.0", "X-BeenThere": "kernel-team@lists.ubuntu.com", "X-Mailman-Version": "2.1.20", "Precedence": "list", "List-Id": "Kernel team discussions <kernel-team.lists.ubuntu.com>", "List-Unsubscribe": "<https://lists.ubuntu.com/mailman/options/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=unsubscribe>", "List-Archive": "<https://lists.ubuntu.com/archives/kernel-team>", "List-Post": "<mailto:kernel-team@lists.ubuntu.com>", "List-Help": "<mailto:kernel-team-request@lists.ubuntu.com?subject=help>", "List-Subscribe": "<https://lists.ubuntu.com/mailman/listinfo/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=subscribe>", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "BugLink: https://bugs.launchpad.net/bugs/2150645\n\nSRU Justification:\n\n[Impact]\n\nNVIDIA engineers reported a sudden drop in performance after applying\nsome conntrack patches. Reverting one of them after a previous one has\nbeen already reverted by upstream.\n\n[Fix]\n\nRevert commit def3e30c59e\n\n[Test case]\n\nCompile tested\nFull test will be performed by NVIDIA R&D engineers to confirm the successful\noutcome after patch is reverted.\n\n[Regression potential]\n\nThe code works in conntrack and with TCP timeouts; it can break some\nTCP flows and offloading structures, leading to broken connections or\nstill under-performing network speed.\n\nAlessio Faina (1):\n UBUNTU: SAUCE: Revert \"netfilter: conntrack: rework offload nf_conn\n timeout extension logic\"\n\n include/net/netfilter/nf_conntrack.h | 10 +++\n net/netfilter/nf_conntrack_core.c | 6 ++\n net/netfilter/nf_flow_table_core.c | 105 +--------------------------\n 3 files changed, 18 insertions(+), 103 deletions(-)" }