From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ZndeX6Yz" Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2059210EF for ; Thu, 7 Dec 2023 11:57:20 -0800 (PST) Received: by mail-pj1-x102f.google.com with SMTP id 98e67ed59e1d1-28647f4ebd9so1188875a91.3 for ; Thu, 07 Dec 2023 11:57:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1701979039; x=1702583839; darn=vger.kernel.org; h=to:date:message-id:subject:mime-version:content-transfer-encoding :from:from:to:cc:subject:date:message-id:reply-to; bh=6HMdpJ28r8mttHeq5lgMJ6ge0bIyorsFZA7pKmCIgG0=; b=ZndeX6YzBLZR/pEgTLg/u+dTJJvVQtdvPCfgHp8DcNqA3onc8HxqQgwwugORzn4Vql 7hpRy8tdPtnjuvZE+p4xNsWRLG7Qp5VEaJCoshX5vkJjkKtguDPIpBwpGh2plB4NlRst 3R4T+N44ZzFNGnwa56muSLcWYEHrYflubNdwCQZhiCVuT90+1jU3j6qqY0bTuCPSeDG+ zFiaindP7VEF92oW6hqfRWwcFMeUVZks86ZIIRiU0yab4elMSscO1Nskl2INWWPA4bN3 4zjUtb45AMdbM2hTsp1oI0pJ4rLUoc2EjfYQTmKJAFhUXLZSk45PiepUkpu8nMvaTgsU uuAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701979039; x=1702583839; h=to:date:message-id:subject:mime-version:content-transfer-encoding :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=6HMdpJ28r8mttHeq5lgMJ6ge0bIyorsFZA7pKmCIgG0=; b=eZyMgHiy6nBjPbkSATDtx2nyxfnobOc6VqGaKSIl8I/cxRmbuzWE6oUGMMJrGKeE/q pPiTfLalzyt47TjSlPE4+MgdFtyLk7BUxL1S9roKHDNY0GlDg/Q+m5NWk5SjGhnP/+F0 kPY5iPumJvSXIC2n2gcdjPqwXzKdV+0e5EqMnmV1PyxjI3/0dzw36V9VTNObYe6jDbTh /osFo3ZIi+BkIFByxvhLscZoAIBagql6KcJ21blpWcv7bomfv0UWHjvImnt2t9giCkSx 3RCIkexkE5SY96mmA4a9eIJDd9FYwW0WCaO7egVdLvJxLCrGhCQmOgQIv2aMseEWJaF0 dtXA== X-Gm-Message-State: AOJu0YxBNjVHMD77Oc0TEfCTtYC4jzjg4ZryUxtnaIMimR8Xsi9+9mp3 HxHXTY3fpdxe4RUTxFhBYIJgk9YQRMQ= X-Google-Smtp-Source: AGHT+IGzSbAwlqROIcyE68Q3E2B/NiRhI2NIWGas5VvRuwvVKzg4jQ1S5Gc3lN036PTg91OxW2wgEQ== X-Received: by 2002:a17:90b:1b0e:b0:286:e436:4aca with SMTP id nu14-20020a17090b1b0e00b00286e4364acamr2725961pjb.92.1701979039342; Thu, 07 Dec 2023 11:57:19 -0800 (PST) Received: from smtpclient.apple ([2001:56a:78d6:ff00::1fac]) by smtp.gmail.com with ESMTPSA id f5-20020a17090aec8500b00286f5f0dcb8sm300811pjy.10.2023.12.07.11.57.18 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 07 Dec 2023 11:57:19 -0800 (PST) From: Arjun Mehta Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.700.6\)) Subject: Rx issues with Linux Bridge and thunderbolt-net Message-Id: Date: Thu, 7 Dec 2023 12:57:08 -0700 To: netdev@vger.kernel.org X-Mailer: Apple Mail (2.3731.700.6) Hi there, I=E2=80=99d like to report what I believe to be a bug with = either Linux Bridge (maybe and/or thunderbolt-net as well). Problem: Rx on bridged Thunderbolt interface are blocked Reported Behavior: Tested on Proxmox host via iperf3, between B550 Vision D-P and MacBook = Pro (2019 intel). On a direct interface, thunderbolt bridge Tx and Rx = speeds are equal and full speed (in my case 9GB/s each). However, when a = thunderbolt bridge is passed through via Linux Bridge to a VM or = container (in my case a Proxmox LXC container or VM) the bridge achieves = full Tx speeds, but Rx speeds are reporting limited to ~30kb/s Expected: The VM/CT should have the same general performance for Tx AND Rx as the = host Reproducing: - Setup for the bridge was done by following this guide: = https://gist.github.com/scyto/67fdc9a517faefa68f730f82d7fa3570 - Both devices on Thunderbolt interfaces have static IPs - VM is given the same IP, but unique MAC address - BIOS has Thunderbolt security mode set to =E2=80=9CNo security=E2=80=9D Further reading: The problem is outlined more with screenshots and further details in = this Reddit post: = https://www.reddit.com/r/Proxmox/comments/17kq5st/slow_rx_speed_from_thund= erbolt_3_port_to_vm_over/. Please let me know if there is any further action I can do to help = investigate or where else I can direct the bug/concern Thanks! Arjun=