[{"id":3684089,"web_url":"http://patchwork.ozlabs.org/comment/3684089/","msgid":"<60d62735-3d0e-4b91-9176-9fcbe31a0c08@canonical.com>","list_archive_url":null,"date":"2026-04-29T14:22:38","subject":"ACK: [SRU][N:linux-bluefield][PATCH 0/1] Revert performance sinking\n conntrack patch","submitter":{"id":91709,"url":"http://patchwork.ozlabs.org/api/people/91709/","name":"Sarah Emery","email":"sarah.emery@canonical.com"},"content":"On 29/04/2026 15:57, Alessio Faina wrote:\n> BugLink: https://bugs.launchpad.net/bugs/2150645\n> \n> SRU Justification:\n> \n> [Impact]\n> \n> NVIDIA engineers reported a sudden drop in performance after applying\n> some conntrack patches. Reverting one of them after a previous one has\n> been already reverted by upstream.\n> \n> [Fix]\n> \n> Revert commit def3e30c59e\n> \n> [Test case]\n> \n> Compile tested\n> Full test will be performed by NVIDIA R&D engineers to confirm the successful\n> outcome after patch is reverted.\n> \n> [Regression potential]\n> \n> The code works in conntrack and with TCP timeouts; it can break some\n> TCP flows and offloading structures, leading to broken connections or\n> still under-performing network speed.\n> \n> Alessio 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(-)\n> \n\nAcked-by: Sarah Emery ","headers":{"Return-Path":"","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=rdrOsiVx;\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; 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charset=\"utf-8\"; Format=\"flowed\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" "}},{"id":3684510,"web_url":"http://patchwork.ozlabs.org/comment/3684510/","msgid":"<20260430075820.3upv6khmkcaqzgzm@wintermute.fritz.box>","list_archive_url":null,"date":"2026-04-30T07:58:20","subject":"ACK: [SRU][N:linux-bluefield][PATCH 0/1] Revert performance sinking\n conntrack patch","submitter":{"id":86131,"url":"http://patchwork.ozlabs.org/api/people/86131/","name":"Manuel Diewald","email":"manuel.diewald@canonical.com"},"content":"On Wed, Apr 29, 2026 at 03:57:19PM +0200, Alessio Faina wrote:\n> BugLink: https://bugs.launchpad.net/bugs/2150645\n> \n> SRU Justification:\n> \n> [Impact]\n> \n> NVIDIA engineers reported a sudden drop in performance after applying\n> some conntrack patches. Reverting one of them after a previous one has\n> been already reverted by upstream.\n> \n> [Fix]\n> \n> Revert commit def3e30c59e\n> \n> [Test case]\n> \n> Compile tested\n> Full test will be performed by NVIDIA R&D engineers to confirm the successful\n> outcome after patch is reverted.\n> \n> [Regression potential]\n> \n> The code works in conntrack and with TCP timeouts; it can break some\n> TCP flows and offloading structures, leading to broken connections or\n> still under-performing network speed.\n> \n> Alessio 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(-)\n> \n> -- \n> 2.43.0\n> \n> \n> -- \n> kernel-team mailing list\n> kernel-team@lists.ubuntu.com\n> https://lists.ubuntu.com/mailman/listinfo/kernel-team\n\nAcked-by: Manuel Diewald ","headers":{"Return-Path":"","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=XAjIJfjK;\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; 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boundary=\"===============8473107464806927682==\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" "}},{"id":3684666,"web_url":"http://patchwork.ozlabs.org/comment/3684666/","msgid":"","list_archive_url":null,"date":"2026-04-30T12:33:39","subject":"APPLIED: [SRU][N:linux-bluefield][PATCH 0/1] Revert performance\n sinking conntrack patch","submitter":{"id":91694,"url":"http://patchwork.ozlabs.org/api/people/91694/","name":"Alessio Faina","email":"alessio.faina@canonical.com"},"content":"On Wed, Apr 29, 2026 at 03:57:19PM +0200, Alessio Faina wrote:\n> BugLink: https://bugs.launchpad.net/bugs/2150645\n> \n> SRU Justification:\n> \n> [Impact]\n> \n> NVIDIA engineers reported a sudden drop in performance after applying\n> some conntrack patches. Reverting one of them after a previous one has\n> been already reverted by upstream.\n> \n> [Fix]\n> \n> Revert commit def3e30c59e\n> \n> [Test case]\n> \n> Compile tested\n> Full test will be performed by NVIDIA R&D engineers to confirm the successful\n> outcome after patch is reverted.\n> \n> [Regression potential]\n> \n> The code works in conntrack and with TCP timeouts; it can break some\n> TCP flows and offloading structures, leading to broken connections or\n> still under-performing network speed.\n> \n> Alessio 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(-)\n> \n> -- \n> 2.43.0\n> \n\nApplied to n:linux-bluefield\n\nThanks!\n- Alessio Faina","headers":{"Return-Path":"","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=Z5tfHTuR;\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 4g5trc0rHfz1yGq\n\tfor ; Thu, 30 Apr 2026 22:33:51 +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 )\n\tid 1wIQaO-0001lX-AW; Thu, 30 Apr 2026 12:33:44 +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 )\n id 1wIQaM-0001l3-Tb\n for kernel-team@lists.ubuntu.com; Thu, 30 Apr 2026 12:33:43 +0000","from mail-wm1-f69.google.com (mail-wm1-f69.google.com\n [209.85.128.69])\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 AC1DD3F9C1\n for ; Thu, 30 Apr 2026 12:33:42 +0000 (UTC)","by mail-wm1-f69.google.com with SMTP id\n 5b1f17b1804b1-488d8deb75fso5764235e9.3\n for ; Thu, 30 Apr 2026 05:33:42 -0700 (PDT)","from localhost (93-40-60-255.ip37.fastwebnet.it. 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