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Date:      Tue, 25 Aug 2009 17:12:02 -0400
From:      Scott Ullrich <sullrich@gmail.com>
To:        Jack Vogel <jfvogel@gmail.com>
Cc:        FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: kernel: em2: watchdog timeout -- resetting
Message-ID:  <d5992baf0908251412k6d807d71qacee342ad3edc800@mail.gmail.com>
In-Reply-To: <2a41acea0908251408q1004fbc7sae2a79b469a3a3a4@mail.gmail.com>
References:  <d5992baf0908251257h545b64f5l62c01f5e2ca6c5d4@mail.gmail.com>  <2a41acea0908251408q1004fbc7sae2a79b469a3a3a4@mail.gmail.com>

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On Tue, Aug 25, 2009 at 5:08 PM, Jack Vogel<jfvogel@gmail.com> wrote:
> Well, there's no magic switch, you could change the driver code to remove
> it,
> however its really indicative of some kind of problem, it shouldn't happen,
> so
> perhaps you want to pursue that. Does it only happen on em2, what is special
> about that path, etc etc..
>
> You can look at the debug/stats data of the interface for clues, maybe its a
> mbuf exhaustion, perhaps descriptor.

After looking at the interface closer it appears the device it is
plugged into does not have power.  In this case it is a Wimax wireless
radio.

Should a device with NOCARRIER cause this error non-stop in the logs?
  Can I get you more information that might help understand why the
watchdog is being tripped?

Thanks for your help!

Scott



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