From owner-freebsd-stable@FreeBSD.ORG Thu May 14 08:30:12 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BA9AC1065689 for ; Thu, 14 May 2009 08:30:12 +0000 (UTC) (envelope-from lars.eggert@nokia.com) Received: from mail.fit.nokia.com (mail.fit.nokia.com [195.148.124.195]) by mx1.freebsd.org (Postfix) with ESMTP id 468698FC08 for ; Thu, 14 May 2009 08:30:11 +0000 (UTC) (envelope-from lars.eggert@nokia.com) Received: from [192.168.0.199] (wlan.fit.nokia.com [195.148.124.254]) (authenticated bits=0) by mail.fit.nokia.com (8.14.3/8.14.3) with ESMTP id n4E8SmHf015397 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Thu, 14 May 2009 11:28:49 +0300 (EEST) (envelope-from lars.eggert@nokia.com) Message-Id: <310A73CC-A32D-4794-BF23-A49715AFCF99@nokia.com> From: Lars Eggert To: "pyunyh@gmail.com" In-Reply-To: <20090514082750.GU65350@michelle.cdnetworks.co.kr> Content-Type: multipart/signed; boundary=Apple-Mail-9--157964867; micalg=sha1; protocol="application/pkcs7-signature" Mime-Version: 1.0 (Apple Message framework v935.3) Date: Thu, 14 May 2009 11:28:43 +0300 References: <4A09DEF1.2010202@delphij.net> <4A09FDB2.5080307@eyede.com> <20090513004131.GP65350@michelle.cdnetworks.co.kr> <20090514082750.GU65350@michelle.cdnetworks.co.kr> X-Mailer: Apple Mail (2.935.3) X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.2 (mail.fit.nokia.com [195.148.124.194]); Thu, 14 May 2009 11:28:49 +0300 (EEST) X-Spam-Status: No, score=-102.6 required=5.0 tests=AWL,BAYES_00, USER_IN_WHITELIST autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on fit.nokia.com X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: "d@delphij.net" , "freebsd-stable@freebsd.org" , "nigel@eyede.com" Subject: Re: TCP differences in 7.2 vs 7.1 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: Thu, 14 May 2009 08:30:13 -0000 --Apple-Mail-9--157964867 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Hi, On 2009-5-14, at 11:27, Pyun YongHyeon wrote: > Then you're seeing different problem on em(4). Last time I checked > em(4) TSO code in em(4) didn't use m_pullup and just returned > ENXIO to caller. I'm not sure that is related with your issue but > would you tell us your network configuration? this box is a Dell 2950 server/router running 7.2-STABLE. It has an onboard bce interface and four dual-port Intel PRO/1000 NICs, giving it 8 em interfaces. (Let me know if you want the boot dmesg.) > If you can easily > reproduce the issue would you let us know? Reproducing the issue is as easy as setting net.inet.tcp.tso=1. What's interesting is that I only see the issue on one of the eight em interfaces. That interface is connected to a D-Link DIR-655 WLAN router. When I tcpdump on the other interfaces with TSO enabled, I see no "IP bad-len 0" messages. Lars --Apple-Mail-9--157964867--