netdev - Re: e1000 driver and samba

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Date:	Mon, 17 Sep 2007 11:02:58 -0700
From:	Rick Jones <rick.jones2@...com>
To:	"Kok, Auke" <auke-jan.h.kok@...el.com>
Cc:	L F <lfabio.linux@...il.com>, James Chapman <jchapman@...alix.com>,
	netdev@...r.kernel.org
Subject: Re: e1000 driver and samba

Kok, Auke wrote:
> L F wrote:
> 
>>>>>>tx_deferred_ok: 486
>>>
>>>this one I wonder about, and might cause delays, I'll have to look
>>>up what it exactly could implicate though.
>>
>>Please do and let me know. samba 3.0.26 helped, but the issue is
>>still there.
> 
> 
> ok, from the spec: tx_deferred_ok is what is in the DC stats register. DC stands
> for "Deferred Count". This initially is meant to track how often the TX unit cannot
> send because the medium is busy in a Half-Duplex link state.
> 
> To me it suggests that your speed is not full-duplex. Check `ethtool eth0` output
> and see if your link is full duplex or not. also check previous kernel messages
> and see what the e1000 driver posted there for link speed messages (as in "e1000:
>  Link is UP speed XXX duplex YYY")

Shouldn't there then have been at least _some_ collisions reported in 
the stats?  And perhaps some late collisions?

rick jones
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