Re: [PATCH v2 4/4] virtio-net: Add support for USO features

Do we really concern about users not enabling features that much? I thought users always can manually change the XML and add whatever they need, and device properties do not like too special here to me. I mean, we have bunch of "features" exported as new "-devices" and users must opt-in for them by changing the XML. We never worried on user not using them. I doubt whether we worried too much on user not opt-in, especially for performance features, because they're, IMHO, targeting advanced users.