Date: Tue, 15 Nov 2005 10:19:20 -0500 (EST) From: Vivek Khera <vivek@khera.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/89073: em(4) continual "em0: RX overrun" warnings Message-ID: <20051115151920.17A14B823@rt.m1e.net> Resent-Message-ID: <200511151520.jAFFKL6n053035@freefall.freebsd.org>
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>Number: 89073 >Category: kern >Synopsis: em(4) continual "em0: RX overrun" warnings >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Nov 15 15:20:21 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Vivek Khera >Release: FreeBSD 6.0-RELEASE amd64 >Organization: >Environment: System: FreeBSD rt.m1e.net 6.0-RELEASE FreeBSD 6.0-RELEASE #2: Thu Nov 3 15:47:50 EST 2005 vivek@rt.m1e.net:/u/data/usr.obj/n/lorax1/usr6/src/sys/RT amd64 Hardware is Dual Opteron Tyan K8SR motherboard with Intel dual port gigabit NIC plugged in. Onboard bge ethernet is disabled in BIOS. Other card is an LSI 320-2X RAID card. >Description: I have an identical system (with two fewer disks, though) running 5.4-RELEASE which runs non-stop. This system I installed 6.0-REL and it runs really well and the disk I/O is much faster. However, if I do any kind of network access I get "em0: RX overrun" warnings in the log at a pretty high rate. This can be caused by doing something so simple as running a buildworld with /usr/src mounted via NFS and /usr/obj being a local disk. The kernel is GENERIC as installed by the 6.0-REL CD. Ultimately, the machine becomes non-responsive to the network. For some reason the serial console is not working past the BIOS boot, so I can't see if the machine is hung totally or just the network (the machine is at a co-lo facility) I'll be attempting to fix the serial console soon. The em0 is conected to a Dell gigabit switch which is working fine (same port was used for another system with no issues) and the NFS server is on a different switch running 100baseT. >How-To-Repeat: run "buildworld" with NFS mounted /usr/src. >Fix: Not sure. Trying a new NIC later today as soon as it arrives. >Release-Note: >Audit-Trail: >Unformatted:
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