From owner-freebsd-net@freebsd.org Mon Nov 6 15:42:56 2017 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0A34AE6155C for ; Mon, 6 Nov 2017 15:42:56 +0000 (UTC) (envelope-from mad@madpilot.net) Received: from mail.madpilot.net (grunt.madpilot.net [78.47.145.38]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id C106A74719 for ; Mon, 6 Nov 2017 15:42:55 +0000 (UTC) (envelope-from mad@madpilot.net) Received: from mail (mail [192.168.254.3]) by mail.madpilot.net (Postfix) with ESMTP id 3yVxdy5gdKzZrb for ; Mon, 6 Nov 2017 16:42:46 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=madpilot.net; h= content-transfer-encoding:content-language:content-type :content-type:mime-version:user-agent:date:date:message-id :subject:subject:from:from:received:received; s=mail; t= 1509982963; x=1511797364; bh=HzM9K3/Iqzlr02LfRj19xqO9vKcmcI+10Je WFHDf9sM=; b=lLXW72qeeOyqvhxrKOooosJ/eLYBCkt+Nh3hJks1F19m0cJlf+3 hurC50gc3i6bFqwNJw3EizmaryejRphOSUGkht7pv+ktINZLdBs8gjYohiQEHWPG mCfsxIX6ALDqKTNy256TbnkRKw+Z64GnF4l2uRK6dC48PZa8SL9gt/mM= Received: from mail.madpilot.net ([192.168.254.3]) by mail (mail.madpilot.net [192.168.254.3]) (amavisd-new, port 10024) with ESMTP id 728KzDQPT41k for ; Mon, 6 Nov 2017 16:42:43 +0100 (CET) Received: from marvin.madpilot.net (micro.madpilot.net [88.149.173.206]) by mail.madpilot.net (Postfix) with ESMTPSA for ; Mon, 6 Nov 2017 16:42:43 +0100 (CET) To: freebsd-net@freebsd.org From: Guido Falsi Subject: em0 causing hangs with tso4 enabled on I219-V system Message-ID: <0dc76b5d-bbe1-cc53-1273-29e8d1c3a969@madpilot.net> Date: Mon, 6 Nov 2017 16:42:43 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Nov 2017 15:42:56 -0000 Hi, As the subject states I have been seeing hangups on a machine with that chipset [1] when using default ifconfig settings. It was hanging once every day on average. Following suggestions I found googling I have disabled tso4 and the machine has been running smoothly for weeks. I don't have any strict requirement to enable tso4 on it so I'm ok with things as is, but I'd like to help debug and resolve the problem. How can I help with this? Any pointers to specific data I can collect which could be useful? Thanks! [1] em0@pci0:0:31:6: class=0x020000 card=0x86721043 chip=0x15b88086 rev=0x31 hdr=0x00 -- Guido Falsi