em0 watchdog timeout with nfs

[Jasper Berlijn]

Hi all,

The problem still exists, the following I've tried:
* Using: FreeBSD 6.2-RELEASE-p4
* Disabled all 'interal' devices (usb / serial / sound)
* Also tried dcgdis.ThisIsZip (the Ethernet Controller didn't need this,
but tried it anyway)
* Swapped with a new em network card and swithed pci bus.

Also using iperf the timeouts occurs! (without nfs)

Reverted back to 4.11 which is still running stable (also with iperf)

Any ideas?

Jack Vogel wrote:
> On 4/5/07, Jasper Berlijn <freebsd-stable at claranet.nl> wrote:
>> Hi,
>>
>> At this moment I'm running FreeBSD 4.11 without any problems. A couple
>> of times I've tried to upgrade to 6.x but without any luck because of
>> the watchdog timeout errors on em0 when using nfs.
>>
>> Mar 30 11:30:48 large kernel: em0: watchdog timeout -- resetting
>> Mar 30 11:30:48 large kernel: em0: link state changed to DOWN
>> Mar 30 11:30:51 large kernel: em0: link state changed to UP
>> Mar 30 11:31:01 large kernel: em0: watchdog timeout -- resetting
>> Mar 30 11:31:01 large kernel: em0: link state changed to DOWN
>> Mar 30 11:31:03 large kernel: em0: link state changed to UP
>> Mar 30 11:31:20 large kernel: em0: watchdog timeout -- resetting
>> Mar 30 11:31:20 large kernel: em0: link state changed to DOWN
>> Mar 30 11:31:23 large kernel: em0: link state changed to UP
>>
>> em0 at pci0:14:0:  class=0x020000 card=0x002e8086 chip=0x100e8086 rev=0x02
>> hdr=0x00
>>     vendor   = 'Intel Corporation'
>>     device   = '82540EM Gigabit Ethernet Controller'
>>     class    = network
>>     subclass = ethernet
>>
>> When I try to copy a large file (1gb) then after a couple of mb's
>> (100mb) the wachtdog timeout will occur. The system is most of the time
>> idle. Using debug.mpsafenet="0" in /boot/loader.conf doesn't make any
>> difference.
>>
>> Any ideas?
> 
> The driver in 6.2 RELEASE fixed all known problems with
> watchdogs, other than REAL issues with the network/hardware.
> Have you tried installing that?
> 
> Jack
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>From - Wed