From owner-freebsd-stable@FreeBSD.ORG Wed Jan 27 07:09:46 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 2907C1065672 for ; Wed, 27 Jan 2010 07:09:46 +0000 (UTC) (envelope-from ncrogers@gmail.com) Received: from mail-pz0-f176.google.com (mail-pz0-f176.google.com [209.85.222.176]) by mx1.freebsd.org (Postfix) with ESMTP id E9F168FC0C for ; Wed, 27 Jan 2010 07:09:45 +0000 (UTC) Received: by pzk6 with SMTP id 6so260555pzk.3 for ; Tue, 26 Jan 2010 23:09:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=sfRoMkxCXp/ZEo1nM4rPH3qnGRL9uC2F7RkT5UuORaA=; b=C3HCNQZEFOoCzH1M//cPF9mMYn36F+b1MIepDWmoNNKt9bTPXbdT4cqe7/G+F6plQt Djm+OILod53w2A2qgMvYK3/UFHNYbyOJebuq9UtWXgdB3hRWxtnuryNs+orU+S3aLvno yMIACwabXx8VN40eDnZwxFagFI1V4Zbd4xGJE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=mAczXV9W2dNUEPod3Yo0iGKkHgs+RRl1msCyGbaSUgamCdpmnrZ2aGReDSKf6UZkAo 2dVEHa9mXhidi3VOfirzKDyC9aVAC6m6VStr0RYx7SgLEJxmncBlZ+hi68Pt46ajXN5v YQPhAnsiw1bSaz94j9QX6BR1xe0NlhzCNeWrE= MIME-Version: 1.0 Received: by 10.142.118.24 with SMTP id q24mr66296wfc.238.1264576185361; Tue, 26 Jan 2010 23:09:45 -0800 (PST) In-Reply-To: <33c6b0bc1001252031k508426bfh25fad65e9223d87@mail.gmail.com> References: <20091201.102925.218343479.hrs@allbsd.org> <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> <33c6b0bc1001252031k508426bfh25fad65e9223d87@mail.gmail.com> Date: Tue, 26 Jan 2010 23:09:45 -0800 Message-ID: <147432021001262309l47ac1a1bsf08c70a9335c887b@mail.gmail.com> From: Nick Rogers To: Joshua Boyd Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: "stable@freebsd.org" 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: Wed, 27 Jan 2010 07:09:46 -0000 Can anyone clarify if I should be looking to disable TSO or TXCSUM, or both, or does disabling either one somehow work around the problem? Thanks a lot. On Mon, Jan 25, 2010 at 8:31 PM, Joshua Boyd wrote: > 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 >