From owner-freebsd-net@FreeBSD.ORG Thu Jan 20 19:04:03 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5C561106566C for ; Thu, 20 Jan 2011 19:04:03 +0000 (UTC) (envelope-from jamesbrandongooch@gmail.com) Received: from mail-wy0-f182.google.com (mail-wy0-f182.google.com [74.125.82.182]) by mx1.freebsd.org (Postfix) with ESMTP id E294C8FC08 for ; Thu, 20 Jan 2011 19:04:02 +0000 (UTC) Received: by wyf19 with SMTP id 19so957992wyf.13 for ; Thu, 20 Jan 2011 11:04:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=8El5fhrXvOc381KxPl/6+aJYOIJCs2eXJjPABTTeN5w=; b=eYiw8QED+kb6ZY93+zcO6Gf5pdblS4cSJtXj3qF4tE3T+TWut3atLcc+/xG10byn+s 17if3KVD0ObPWCHCl23thDWSyKubjihvt+HEV/nTgc8rolnjhEjhGE5K/KktFAZHR61A 9d4zDASSS0Cd/CT7Xu7x6JxyYDvFDAoKjb2fY= 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:content-transfer-encoding; b=D3G/v8HI79Ei0QVssfThhZC+HA29itnotsFI7WQB5tKlZ36AuuJJgiN/hsA8KUbciZ frjR5GWKpW2tmE0I87BPqtWOfQPbLOzlHDjsogEGANUfTN4ppWZJDIxNI63/HqTtctaR OG4Q2c5hbCKOMzpiJ6H3Aouk+/hJ8unEt311g= MIME-Version: 1.0 Received: by 10.216.18.194 with SMTP id l44mr4645022wel.87.1295550240081; Thu, 20 Jan 2011 11:04:00 -0800 (PST) Received: by 10.216.36.71 with HTTP; Thu, 20 Jan 2011 11:03:59 -0800 (PST) In-Reply-To: <20110119235924.GD12030@michelle.cdnetworks.com> References: <20110117005524.GA1305@michelle.cdnetworks.com> <20110118.093804.74673434.sthaug@nethelp.no> <20110118182351.GE5624@michelle.cdnetworks.com> <20110118.193530.74688427.sthaug@nethelp.no> <20110119235924.GD12030@michelle.cdnetworks.com> Date: Thu, 20 Jan 2011 13:03:59 -0600 Message-ID: From: Brandon Gooch To: pyunyh@gmail.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-net@freebsd.org, rmacklem@uoguelph.ca, sthaug@nethelp.no, ronald-freebsd8@klop.yi.org Subject: Re: bogus 0 len IP packet, was: Hang in VOP_LOCK1_APV on 8-STABLE with NFS. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Jan 2011 19:04:03 -0000 On Wed, Jan 19, 2011 at 5:59 PM, Pyun YongHyeon wrote: > On Tue, Jan 18, 2011 at 07:35:30PM +0100, sthaug@nethelp.no wrote: >> > > I'm seeing the same problem with Broadcom NetXtreme (bce) cards: >> > > >> > > bce0@pci0:3:0:0: =A0 =A0 =A0 =A0class=3D0x020000 card=3D0x03421014 c= hip=3D0x164c14e4 rev=3D0x12 hdr=3D0x00 >> > > =A0 =A0 vendor =A0 =A0 =3D 'Broadcom Corporation' >> > > =A0 =A0 device =A0 =A0 =3D 'Broadcom NetXtreme II Gigabit Ethernet A= dapter (BCM5708)' >> > > =A0 =A0 class =A0 =A0 =A0=3D network >> > > =A0 =A0 subclass =A0 =3D ethernet >> > > >> > > This is with 8.2-PRERELEASE. Turning off TSO (ifconfig bce0 -tso) >> > > removes the problem. >> > > >> > >> > Is there a reliable way to trigger this on bce(4)? I don't have >> > BCM5708 but I have BCM5709 so I can verify that. >> >> It showed up pretty much immediately when running a csup sessions >> against cvsup2.us.freebsd.org. >> >> I have a pcap file from the session, if you're interested. >> > > I vaguely guess upper stack might pass less than MSS sized segment > to TSO capable driver with CSUM_TSO. > How about merging r212803 to stable/8? It states in the commit message: MFC after: 10 days When I read an MFC, is it more of a suggestion than a promise? I'm not trying to be sarcastic :| -Brandon