netdev - Re: TSO support

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Message-Id: <9E843B57-78E9-43E1-8963-ABBF841CF318@sfc.wide.ad.jp>
Date:	Tue, 27 Sep 2011 17:00:44 +0900
From:	Michio Honda <micchie@....wide.ad.jp>
To:	Sedat Cakir <sedat.cakirim@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: TSO support

Hi, 

On TSO and TCP options, as far as I tested approx. 10 NICs, TSO copies TCP options to all the split segments. (We performed this test for Timestamp and an undefined option).  
This paper (http://nrg.cs.ucl.ac.uk/mjh/tmp/mboxes.pdf) would be helpful.  

Thanks,
- Michio

On Sep 27, 2011, at 4:19 PM, Sedat Cakir wrote:

> Hi,
> 
> We are adding the TCP Segmentation offload (TSO) support to the device
> driver and the hardware. I am wondering: Can Linux subsystem supports
> the use of IP options and TCP options? If so then which options (e.g
> SACK processing for TCP)? Do we need any implementation in the NIC to
> manage TCP/IP options?
> 
> Thanks,
> Sedat
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