em(4) interface wedges

[Christian Brueffer]

On Sat, Sep 16, 2006 at 12:29:43PM -0500, Christian S.J. Peron wrote:
> Christian Brueffer wrote:
> >On Fri, Sep 15, 2006 at 08:09:20PM +0200, Andre Oppermann wrote:
> >  
> >>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.
> >>
> >>    
> >
> >Yeah, OACTIVE is set.
> >
> >  
> >>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'.
> >>
> >>    
> >
> >Correct, I'm using it at 100Mbit and disabling TSO works around the
> >issue.
>
> Are you using dhclient (or do you have any other BPF peers attached to 
> the network interface?)
> 

No dhclient and no other BPF peers that I'm aware of.

- Christian

-- 
Christian Brueffer	chris at unixpages.org	brueffer at FreeBSD.org
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