On Tue, Jan 18, 2011 at 09:38:04AM +0100, sth...@nethelp.no wrote: > > > So, does anyone have an idea why the IP length field would be set to 0 > > > for these TCP/IP packets? > > > > > > Here's some info from Ronald w.r.t. his hardware. (All I can think of is > > > that he could try disabling TSO, etc?) > > > > > > Thanks in advance for any help with this, rick > > > > > > > It seems that issue came from TSO. Driver will set ip_len and > > ip_sum field to 0 before passing the TCP segment to controller. > > The failed length were 4446, 5858, 3034 and 4310 and the total > > number of such frames are more than 35k within 90 seconds. Since > > failed length 4310 is continuously repeated I guess there is edge > > case where em(4) didn't free failed TCP segment for TSO. > > I remember there was commit to HEAD(r217295) which could be related > > with this issue. > > I'm seeing the same problem with Broadcom NetXtreme (bce) cards: > > bce0@pci0:3:0:0: class=0x020000 card=0x03421014 chip=0x164c14e4 > rev=0x12 hdr=0x00 > vendor = 'Broadcom Corporation' > device = 'Broadcom NetXtreme II Gigabit Ethernet Adapter (BCM5708)' > class = network > subclass = 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. > Steinar Haug, Nethelp consulting, sth...@nethelp.no _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
