Re: [PATCH V5 2/6 net-next] netdevice.h: Add zero-copy flag in netdevice

On Mon, May 16, 2011 at 04:32:18PM -0700, Shirley Ma wrote:

Hello Michael,

Looks like to use a new flag requires more time/work.
I am thinking
whether we can just use HIGHDMA flag to enable zero-copy in macvtap to
avoid the new flag for now since mavctap uses real NICs as lower device?

Thanks
Shirley

Problem is, in your patch there are a set of restrictions on what the
device can do with the skb that we need to enforce somehow.
Also, how do we know it's a 'real NIC' and not a software device?

-- 
MST