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

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Message-ID: <1305665599.10756.36.camel@localhost.localdomain>
Date:	Tue, 17 May 2011 13:53:19 -0700
From:	Shirley Ma <mashirle@...ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Ben Hutchings <bhutchings@...arflare.com>,
	David Miller <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Avi Kivity <avi@...hat.com>, Arnd Bergmann <arnd@...db.de>,
	netdev@...r.kernel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V5 2/6 net-next] netdevice.h: Add zero-copy flag in
 netdevice

On Tue, 2011-05-17 at 09:21 +0300, Michael S. Tsirkin wrote:
> 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?

I checked macvtap newlink, it doesn't seem to block software device.

So we need to work on the wider feature bit first.

Shirley

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