Date: Thu, 20 Jan 2011 13:03:59 -0600 From: Brandon Gooch <jamesbrandongooch@gmail.com> To: pyunyh@gmail.com 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. Message-ID: <AANLkTikHuvKD6Ws1ZUx7E%2BD7HQ16iy7BydUqjaG99cN1@mail.gmail.com> 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>
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On Wed, Jan 19, 2011 at 5:59 PM, Pyun YongHyeon <pyunyh@gmail.com> 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
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