Re: [PATCH RFC] tun: experimental zero copy tx support

On Mon, 2012-05-14 at 21:39 +0300, Michael S. Tsirkin wrote:

quoted

Hello Mike,

Have you tested this patch? I think the difference between macvtap

and

quoted

tap is tap forwarding the packet to bridge. The zerocopy is disabled

in

quoted

this case.

Shirley

Testing in progress, but the patchset I pointed to enables
zerocopy with bridge. 

Hello Mike,

You meant this patch or another patchset for enabling bridge zerocopy?

I remembered we disabled forward skb zerocopy since the user space
program might hold the buffers too long or forever.

In tap/bridge case, when the tx buffers will be released?

Thanks
Shirley