W dniu 18 maja 2011 00:28 użytkownik Shirley Ma <mashirle@xxxxxxxxxx> napisał: > On Tue, 2011-05-17 at 23:48 +0200, Michał Mirosław wrote: >> 2011/5/17 Shirley Ma <mashirle@xxxxxxxxxx>: >> > 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? >> >> Is there any other restriction besides requiring driver to not recycle >> the skb? Are there any drivers that recycle TX skbs? > Not more other restrictions, skb clone is OK. pskb_expand_head() looks > OK to me from code review. > Currently there is no drivers recycle TX skbs. So why do you require the target device to have some flags at all? Do I understand correctly, that this zero-copy feature is about packets received from VMs? Best Regards, Michał Mirosław -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
