Date: Thu, 8 Apr 2010 10:23:32 -0700 From: Jack Vogel <jfvogel@gmail.com> To: Brandon Gooch <jamesbrandongooch@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: em driver regression Message-ID: <o2r2a41acea1004081023ia889eb2fte06f0cad60389f05@mail.gmail.com> In-Reply-To: <x2k179b97fb1004081018x588378ebra68e1b9eccd0a978@mail.gmail.com> References: <201004081313.o38DD4JM041821@lava.sentex.ca> <201004081320.o38DKVX7041854@lava.sentex.ca> <l2n2a41acea1004080952u988c0dcci6f0e8b8750ad1fac@mail.gmail.com> <o2y179b97fb1004081001qb9fd54a5i3f23820a9b57f897@mail.gmail.com> <z2o2a41acea1004081006v9903e4adgf4d328682fdeba82@mail.gmail.com> <x2k179b97fb1004081018x588378ebra68e1b9eccd0a978@mail.gmail.com>
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On Thu, Apr 8, 2010 at 10:18 AM, Brandon Gooch <jamesbrandongooch@gmail.com>wrote: > On Thu, Apr 8, 2010 at 12:06 PM, Jack Vogel <jfvogel@gmail.com> wrote: > > > > > > On Thu, Apr 8, 2010 at 10:01 AM, Brandon Gooch < > jamesbrandongooch@gmail.com> > > wrote: > >> > >> On Thu, Apr 8, 2010 at 11:52 AM, Jack Vogel <jfvogel@gmail.com> wrote: > >> > Mike, I noticed this connection is only 100Mb, that isn't accidental? > >> > And, > >> > is it possible for > >> > you to check a connection at 1Gb and see if the watchdogs don't > happen. > >> > > >> > My test engineer is running this code, and we are having trouble > >> > repro'ing > >> > the issue, so any > >> > clues might help. Is the kernel 64 or 32 bit? > >> > > >> > Jack > >> > > >> > >> Not to butt in or anything... > > > > Not butting in :) OK, so this all looks fine or am I missing something? > > > > Jack > > > > This is the dmesg from the system exhibiting the "ip length 328 > disagrees with bytes received 332" while attempting to obtain a lease > on the two DHCP-enabled VLANs, and also manifests in the VirtualBox > bridged networking guests. > > I can honestly say that other than the output from dhclient and the > VirtualBox issue, I might not have noticed problems otherwise. > > For instance, I have a VLAN interface configured to connect to an > "outside" LAN segment and I'm running sshd on that interfaces IP > address (using the new multiple routing table feature as well). I was > able to connect to the sshd instance as usual, and I can make > connections out as in: > > # setfib 4 ping google.com > > ...things seemed OK. Until VirtualBox. Then I started paying attention > to messages scrolling by as my machine booted and saw the dhclient "ip > length" thing (just as Mike Tancsa had) and thought, "It must be the > new em(4) driver". > > That's my story :) > > I don't know what chip my em(4) device is, how can I check that? Also, > would some type of traffic capture help in this case? > > -Brandon > > pciconf -l will show us. my tester is having trouble reproducing this, but I dont think he is using vlans, that must be the missing ingredient. The disagreement in size is 4 bytes, just the size of the CRC coincidentally, but I dont have it set to strip, hmmmm. I may have some code for you to try shortly, stay tuned. Jack
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