Hello Eddie, On Wed, 2010-08-04 at 10:06 +0800, Dong, Eddie wrote: > But zero-copy is a Linux generic feature that can be used by other > VMMs as well if the BE service drivers want to incorporate. If we can > make mp device VMM-agnostic (it may be not yet in current patch), that > will help Linux more. First other VMMs support tun/tap which provides most funcs but not zero copy. Second mp patch only supports zero copy for vhost now, macvtap zero copy will not be used by vhost only. Third, the current mp device doesn't fallback to copy when failure. So you can extend mp device to support all funcs, but the usage/funcs will be similar with macvtap, then either mp device will replace macvtap in the future with similar funcs or we can use enhance macvtap to support zero copy. It is not necessary to have both in Linux. I think it's better to implement zero copy in macvtap, tun/tap instead of creating a new mp device. Thanks Shirley -- 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
