netdev - Re: behavior of TSO in kernel

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Date:	Fri, 05 Jun 2009 18:20:38 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	radhamohan_ch@...oo.com
Cc:	netdev@...r.kernel.org
Subject: Re: behavior of TSO in kernel

From: Radha Mohan <radhamohan_ch@...oo.com>
Date: Fri, 5 Jun 2009 20:09:10 +0530 (IST)

> I have an ethernet driver with TSO, SG, IP_CSUM features enabled. I
> am using linux-2.6.15 kernel. The MTU is set to 9014. It seems the
> driver is getting skbs of only 9014 bytes length even though the
> application is able to write some 64KB at a time.

The TSO engine of the networking has been rewritten at least
3 times since 2.6.15

You're asking us how code worked three major rewrites ago and
nobody is going to help you without some kind of paid support
contract from a Linux support vendor, sorry.
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