RE: TSO and IPv6

From: Ravinandan Arakali
Date: Fri Apr 15 2005 - 13:35:55 EST


David,
Our next rev of the card Xframe II has support for large send offload
for UDP as well. We are in the process of generating and testing a
kernel patch for the same. The initial results look very good.

If you feel this is useful, we can send across the patch for review
(along with benchmark results).
Also, currently it's written for IPv4. We could do it for IPv6 as well.
Will wait for your opinion..

Thanks,
Ravi


-----Original Message-----
From: Ravinandan Arakali [mailto:ravinandan.arakali@xxxxxxxxxxxx]
Sent: Friday, April 15, 2005 10:00 AM
To: 'David S. Miller'
Cc: 'linux-net@xxxxxxxxxxxxxxx'
Subject: RE: TSO and IPv6


Thanks David.

Yes, infact we have a card which supports TSO over IPv6.
This support in the kernel will be helpful to us.

Ravi

-----Original Message-----
From: David S. Miller [mailto:davem@xxxxxxxxxxxxx]
Sent: Thursday, April 14, 2005 9:27 PM
To: Ravinandan Arakali
Cc: linux-net@xxxxxxxxxxxxxxx
Subject: Re: TSO and IPv6


On Thu, 14 Apr 2005 17:13:13 -0700
"Ravinandan Arakali" <ravinandan.arakali@xxxxxxxxxxxx> wrote:

> Does Linux support TSO for "TCP over IPv6" ? I did some searching
> in the IPv6 code(2.6.12 kernel) but couldn't find any such support.

No, the support is not there, not because of any technical reason
but simply because no devices exist which can handle ipv6 TCP
TSO.

If you have a card which can do it, we simply need to add a new
NETIF_F_TSO_IPV6 flag and the necessary tcp*.c code.

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