From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 84B42202C4E; Mon, 3 Feb 2025 10:20:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738578004; cv=none; b=AMBo8ZyB+LvJ1iYghm/jtI2qiEaxepVDsdpgfcWeIAVC9GzPCUwMlZRruCKdGuRMCKpWQurtQKCFPf9co36lAm60XgCamIqsBxEyUzcwSuYVbHgk5zwsvDWVTxjJbKZQBRyHMuaZub1yfgGVc36Knd4HKDiJpeS6VJ2fih0iRMI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738578004; c=relaxed/simple; bh=swGdISvDcFg/fvJ8yNHlLKqrsreLfTHP2s0De6F5f90=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=nbDgIvHClPF3Ynze2QXj2yRlavEyRgDmOEVuvfINaDkruta9iPJJZ3dmfDTOO5q1hEAXMaGdcHe2C2DCiLNNheCPOC1mFNGSj4qC3Beu0ZLLCpmJMJKMOvuNljCOPMUXXZrBznTMBzvofMDrO+IoMqzE1x+ZtuSs/C0Oaga8+y0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Xt7tOQCN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Xt7tOQCN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EBA46C4CEE4; Mon, 3 Feb 2025 10:20:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738578004; bh=swGdISvDcFg/fvJ8yNHlLKqrsreLfTHP2s0De6F5f90=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=Xt7tOQCN4Vo4GyNlIq7mkU1m026VPNbHNCqZMs9Pvs6aYm6eNYuNDiUH8Cz6wsOl7 s8cmAB+pWOOW6PmMy8sa8iDo5rEG03GlN2os4IwNFHavIbz/nQQrNdu0GkUa6VA6mN Fqrt4Jzc+kPdLeHI9vGnlE3iqMVMN5hz2WMAFp3oU6kHl7WtWSNhGHNXB20silwck5 NBrH31BpeahcKC1OhDbqrWm/55hQE3hPkjJ0WoQyvZXmIlftaOL+1FWBwGuDYB7cId r17Gle/9Zgyoon3i7fLdkAovz9fKchKNjClmGaiJFewFFdXFtGgF63c9TxOaSA5yUq It0ExoLEeqG5Q== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 34387380AA76; Mon, 3 Feb 2025 10:20:32 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH v3 net] udp: gso: do not drop small packets when PMTU reduces From: patchwork-bot+netdevbpf@kernel.org Message-Id: <173857803108.3097404.4630945302894168269.git-patchwork-notify@kernel.org> Date: Mon, 03 Feb 2025 10:20:31 +0000 References: In-Reply-To: To: Yan Zhai Cc: netdev@vger.kernel.org, willemdebruijn.kernel@gmail.com, davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, shuah@kernel.org, johunt@akamai.com, alexander.h.duyck@linux.intel.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, kernel-team@cloudflare.com Hello: This patch was applied to netdev/net.git (main) by David S. Miller : On Fri, 31 Jan 2025 00:31:39 -0800 you wrote: > Commit 4094871db1d6 ("udp: only do GSO if # of segs > 1") avoided GSO > for small packets. But the kernel currently dismisses GSO requests only > after checking MTU/PMTU on gso_size. This means any packets, regardless > of their payload sizes, could be dropped when PMTU becomes smaller than > requested gso_size. We encountered this issue in production and it > caused a reliability problem that new QUIC connection cannot be > established before PMTU cache expired, while non GSO sockets still > worked fine at the same time. > > [...] Here is the summary with links: - [v3,net] udp: gso: do not drop small packets when PMTU reduces https://git.kernel.org/netdev/net/c/235174b2bed8 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html