From owner-freebsd-stable@FreeBSD.ORG Tue Jan 26 05:03:07 2010 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EFA6A106566C for ; Tue, 26 Jan 2010 05:03:06 +0000 (UTC) (envelope-from boydjd@jbip.net) Received: from mail-fx0-f227.google.com (mail-fx0-f227.google.com [209.85.220.227]) by mx1.freebsd.org (Postfix) with ESMTP id 8CC7D8FC12 for ; Tue, 26 Jan 2010 05:03:06 +0000 (UTC) Received: by fxm27 with SMTP id 27so1562866fxm.3 for ; Mon, 25 Jan 2010 21:03:05 -0800 (PST) MIME-Version: 1.0 Received: by 10.239.187.132 with SMTP id l4mr851105hbh.87.1264480327170; Mon, 25 Jan 2010 20:32:07 -0800 (PST) In-Reply-To: <02307620-ECDC-4E8B-A5B1-FF8491E226C4@nokia.com> References: <20091201.102925.218343479.hrs@allbsd.org> <2a41acea0912021514r2d44dd33n4c364518d7fe1703@mail.gmail.com> <20091203.182931.129751456.hrs@allbsd.org> <4B43F6EE.3010308@ucla.edu> <147432021001242047k659a26d0s44b35164920aeb74@mail.gmail.com> <95D3CB82-BC44-491D-86E4-5CB82F89C0FC@nokia.com> <147432021001250825p202914a7ka5a2c1d28d96bac3@mail.gmail.com> <20100125182257.GG1187@michelle.cdnetworks.com> <147432021001251038r69393ab3m1a797e58f9fa905a@mail.gmail.com> <02307620-ECDC-4E8B-A5B1-FF8491E226C4@nokia.com> From: Joshua Boyd Date: Mon, 25 Jan 2010 23:31:47 -0500 Message-ID: <33c6b0bc1001252031k508426bfh25fad65e9223d87@mail.gmail.com> To: "stable@freebsd.org" Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: Re: em interface slow down on 8.0R X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Jan 2010 05:03:07 -0000 I've been having a similar problem with my network dropping completely on my 8-STABLE gateway/firewall/fileserver. My setup is a little different, as I have re0 and ral0 bridged for LAN, and em0 for WAN. I've just turned off TX checksum offloading to see if that makes any difference. On Mon, Jan 25, 2010 at 1:49 PM, Lars Eggert wrote: > Hi, > > On 2010-1-25, at 19:38, Nick Rogers wrote: > >> On Mon, Jan 25, 2010 at 10:22 AM, Pyun YongHyeon > wrote: > >> I'm not sure you're seeing a checksum offload bug of em(4) but the > >> bug is easily reproducible in VLAN environments. If the issue is > >> gone when you disable TX checksum offloading, see kern/141843 for > >> for more detailed information as well as fix. > >> > > Good to know, but I am having a similar problem on another em(4) > interface that has no VLAN interfaces. > > FYI, I also have these issues without using VLANs, and turning off TSO > fixed them. > > Lars -- Joshua Boyd JBipNet E-mail: boydjd@jbip.net http://www.jbip.net