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From: Frode Nordahl <frode@nordahl.net>
Date: Sat, 16 Sep 2006 10:54:24 +0200
To: freebsd-stable@freebsd.org
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Subject: Re: em0: watchdog timeout -- resetting (6.1-STABLE)
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Hello,

Just wanted to send a me too on this issue. Whenever it happends I  
can see our Cisco switch reporting the interface going down and up as  
well (Line Protocol).


FreeBSD localhost.localdomain 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE  
#1: Wed Sep 13 00:10:04 CEST 2006     frode@localhost.localdomain:/ 
usr/obj/usr/src/sys/PT  i386

em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
         options=b<RXCSUM,TXCSUM,VLAN_MTU>
         media: Ethernet autoselect (1000baseTX <full-duplex>)
         status: active

em0@pci1:11:0:  class=0x020000 card=0x10048086 chip=0x10048086  
rev=0x02 hdr=0x00
     vendor   = 'Intel Corporation'
     device   = '82543GC Gigabit Ethernet Controller (Copper)'
     class    = network
     subclass = ethernet

(This is a add-in 64bit PCI card.)

I am stress-testing -STABLE on a spare server to aid in making 6.2 as  
bugfree as possible.

It is set up as a NFS server with two Linux NFS clients connected  
that is concurrently extracting 5 copies of /usr/src to it, and  
running a program that creates millions of files with random UID's to  
test for QUOTA issues.

On the server I repeatedly dump the exported filesystem with snapshot  
and cache enabled. (dump -L -C 32 -af /dev/null ...)


I'm building todays -STABLE on a different server with SMP and two em  
NIC's onboard, and will start similar tests on it to see if I can  
reproduce the watchdog timeouts there as well.

--
Frode Nordahl