kern/89073: em(4) continual "em0: RX overrun" warnings
vivek at khera.org
Tue Nov 15 15:20:26 GMT 2005
>Synopsis: em(4) continual "em0: RX overrun" warnings
>Arrival-Date: Tue Nov 15 15:20:21 GMT 2005
>Originator: Vivek Khera
>Release: FreeBSD 6.0-RELEASE amd64
System: FreeBSD rt.m1e.net 6.0-RELEASE FreeBSD 6.0-RELEASE #2: Thu Nov 3 15:47:50 EST 2005 vivek at 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.
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.
run "buildworld" with NFS mounted /usr/src.
Not sure. Trying a new NIC later today as soon as it arrives.
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