Re: [PATCH V5 2/6 net-next] netdevice.h: Add zero-copy flag innetdevice
From: Shirley Ma
Date: Wed May 18 2011 - 13:01:00 EST
On Wed, 2011-05-18 at 19:51 +0300, Michael S. Tsirkin wrote:
> > > Yes, I agree. I think for tcpdump, we really need to copy the
> > > anyway, to avoid guest changing it in between. So we do that and
> > > use the copy everywhere, release the old one. Hmm?
> > Yes. Old one use zerocopy, new one use copy data.
> > Thanks
> > Shirley
> No, that's wrong, as they might become different with a
> malicious guest. As long as we copied already, lets realease
> the data and have everyone use the copy.
Ok, I will patch pskb_expand_head to test it out.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/