Date: Tue, 15 Apr 2008 00:31:35 GMT From: Paul <paul@gtcomm.net> To: freebsd-gnats-submit@FreeBSD.org Subject: amd64/122780: tcpdump on lagg interface during high pps wedges netcode Message-ID: <200804150031.m3F0VZ0G082580@www.freebsd.org> Resent-Message-ID: <200804150040.m3F0e1O5054904@freefall.freebsd.org>
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>Number: 122780 >Category: amd64 >Synopsis: tcpdump on lagg interface during high pps wedges netcode >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-amd64 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Apr 15 00:40:01 UTC 2008 >Closed-Date: >Last-Modified: >Originator: Paul >Release: 7.0 Release >Organization: GTCOMM >Environment: FreeBSD x 7.0-RELEASE FreeBSD 7.0-RELEASE #2: Fri Apr 4 13:11:07 EDT 2008 root@x:/usr/obj/usr/src/sys/ROUTER amd64 >Description: Sending a rate of 200kpps through or to lagg interface and then using the tcpdump command causes the entire network stack to have issues on all interfaces including ones that use other drivers eventually causing machine to be unaccessable on the network. (ex. tcpdump -n -i lagg0 ) Lagg interface is on EM driver using two EM ports, example: ifconfig lagg0 laggproto lacp laggport em4 laggport em5 Port on the other end is either Cisco switch or another FREEBSD machine with lagg interface. Both have same problems. kern.hz=4000 kern.polling.enable=1 kern.polling.reg_frac=400 kern.polling.user_frac=20 kern.polling.idle_poll=1 kern.polling.each_burst=1000 kern.polling.burst_max=8000 EM is PCI-E 4x 4 port Intel Server card, copper ports I would be happy to provide any more information. dmesg reports nothing when it happens and I did not get a chance to do much more debugging on the issue. I do have a second issue with this setup which may or may not be related. With polling enabled, the machine panics on a spin lock when rebooting, during the shutdown process. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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