From: Steve Wise <swise@opengridcomputing.com>
Date: Mon, 24 Sep 2007 08:54:13 -0500

quoted text
> I think pktgen should be cloning the skbs using skb_clone().  Then it 
> will work for all devices, eh?

The problem is that skb_clone() is (relatively) expensive and
pktgen is trying to just grab a reference to the SKB in
the absolutely cheapest way possible.

In my personal opinion, I think what the drivers that don't
work with pktgen are doing is wrong and they should find
another way to pass state around other than to depend upon
being able to use the ->cb[] area at-will.
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