netdev - Re: r8169, enabling TX checksumming breaks things?

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Date:	Wed, 23 Sep 2009 17:24:23 +0300
From:	Denys Fedoryschenko <denys@...p.net.lb>
To:	David Dillow <dave@...dillows.org>
Cc:	romieu@...zoreil.com, netdev@...r.kernel.org
Subject: Re: r8169, enabling TX checksumming breaks things?

On Wednesday 23 September 2009 17:02:24 David Dillow wrote:
> On Wed, 2009-09-23 at 09:15 +0300, Denys Fedoryschenko wrote:
> > Hi
> >
> > Is it expected that:
> > 1)TX checksumming is off by default
> > 2)If i try to enable it over ethtool -K eth0 tx on , TCP sessions on
> > proxy getting stuck, even in tcpdump looks everything fine and packets
> > reaching destination, i don't understand what is a reason of failure.
> > Maybe if this feature supposed to not work - user must not be able just
> > to turn it on?
>
> It is broken for large swaths of the hardware -- I have patches that got
> it and TSO working on my hardware, and they provide a framework to see
> about getting it working on yours.
>
> Basically, the fields are in different places depending on the chip
> revision. I'll try to dig those out tonight and send them along so we
> can experiment.
Thanks, i have 8 hosts (4 hosts with RTL8168b/8111b. and 4 with 
RTL8168d/8111d) to test. Ready for patches to test them :-)
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