linux-kernel - Re: POI: nvidia forcedeth phy id not present

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Message-ID: <50254019.1030304@telenet.be>
Date:	Fri, 10 Aug 2012 19:08:41 +0200
From:	Janpieter Sollie <janpieter.sollie@...enet.be>
To:	linux-kernel@...r.kernel.org
Subject: Re: POI: nvidia forcedeth phy id not present

A primary concern seems to be solved (4k frame size).
However, it is not really a patch yet, just a dirty workaround (just replaced ETH_DATA_LEN with
a value 4000, my switch is limited to 4k)

486c486
< #define NV_PKTLIMIT_1_ETH_DATA_LEN /* hard limit not known */
---
> #define NV_PKTLIMIT_1 4000 /* hard limit not known */

I will try to improve the MTU detection in driver, but it can take some time before I really
understand what each function does. I do not know if this workaround forces a value to the
'initiated' phy, or just forces a wrong MTU to be used on standard nvidia cards.
the results are worth considering: dd -if=//server/share of=/dev/null went from 91 to 112 mbps
(and this is no file cache, the pc has 2gb ram (>50% used by GUI) and the source file is 30 ...)
any help developing a patch may be useful.  Is there some documentation about this driver module?
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