em0: watchdog timeout -- resetting (6.1-STABLE)

[Ronald Klop]

On Tue, 05 Sep 2006 23:52:05 +0200, Ronald Klop  
<ronald-freebsd8 at klop.yi.org> wrote:

> Hello,
>
> I get these errors a lot.
>
> Sep  5 11:55:12 ronald kernel: em0: watchdog timeout -- resetting
> Sep  5 11:55:12 ronald kernel: em0: link state changed to DOWN
> Sep  5 11:55:14 ronald kernel: em0: link state changed to UP
> Sep  5 12:00:37 ronald kernel: em0: watchdog timeout -- resetting
> Sep  5 12:00:37 ronald kernel: em0: link state changed to DOWN
> Sep  5 12:00:39 ronald kernel: em0: link state changed to UP
>
> I tried turning off rxcsum/txcsum and set these sysctl's.
> dev.em.0.rx_int_delay: 0
> dev.em.0.tx_int_delay: 0 (default 66)
> But the error is still there.
> Searching the internet and the list provides more of the same problems,
> but I didn't find an answer.
>
> My dmesg is attached.
>
> Is there any info I need to provide to debug this or can I try patches?

Them manual page em(4) mentions trying another cable when the watchdog  
timeout happens, so I tried that. But it didn't help.
Is there anything I can test to (help) debug this?
It happens a lot when my machine is under load. (100% CPU)
Is it possible that it happens since I upgraded the memory from 1GB to 2  
GB?

(dmesg was attached to my previous mail, but I can provide it again.)

Ronald.

-- 
  Ronald Klop
  Amsterdam, The Netherlands