Re: [patch 7/9] s390: qeth tcp segmentation offload.

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David,

linux-net-owner@xxxxxxxxxxxxxxx wrote on 24.03.2005 19:38:30:

> On Thu, 24 Mar 2005 14:33:56 +0100
> Martin Schwidefsky <schwidefsky@xxxxxxxxxx> wrote:
>
> > [patch 7/9] s390: qeth tcp segmentation offload.
> >
> > From: Frank Pavlic <pavlic@xxxxxxxxxx>
> >
> > Add support for TCP Segmentation Offload to the qeth network driver.
>
> It really doesn't appear that you're offloading TCP Segmentation
> to the card, you're doing it mostly in software in the qeth
> driver.
what you are talking about is the eddp part which is just one option to use
kernel's TSO support .
This usage of TSO support is called Enhanced Drivers Packing  , means a
better usage of our
send buffers and thus less IO operations.
The other option is the "real" TCP segmentation offload support driven by
hardware. The code is in
qeth_tso.[hc]  ....
>
> If that's beneficial, that's fine, but such a thing belongs somewhere
> generic so that other drivers can do it without %100 replicating your
> qeth code.
I don't think that it is something for generic usage as it is very
OSA card specific and qeth driver respectively.
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