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Date: Fri, 15 Sep 2006 20:09:20 +0200
From: Andre Oppermann <andre@freebsd.org>
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To: Scott Long <scottl@samsco.org>
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Cc: current@freebsd.org, Christian Brueffer <brueffer@freebsd.org>
Subject: Re: em(4) interface wedges
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Scott Long wrote:
> Christian Brueffer wrote:
> 
>> Hi,
>>
>> with the latest em(4) code in current (sans the printf/device_printf
>> change), my interface wedges every few hours.  It can be resurrected
>> by bringing it down and up again.
>>
>> The device in question is a E1000_DEV_ID_82540EP_LP built into my
>> Thinkpad.
>>
>> Anyone else seeing this?
>>
>> - Christian
>>
> 
> Yes.  It's also almost guaranteed to wedge the first time I do a remote
> CVS operation after boot.

When the interface wedges does it show the OACTIVE flag in ifconfig output?
This is an important hint.

If you are running at 100Mbit there seems to be bug in the em(4) harware
with TSO.  Try disabling TSO on it with 'ifconfig em0 -tso'.

-- 
Andre