Comment by tuetuopay

Yup, I don't really get it either. I've had this exact setup in my mind for a while to make an hypervisor dataplane (thus on TAPs, not VETHs). It's working as designed, and it's precisely for this usecase the veth driver has had quite a lot of care as far as XDP is concerned, getting optimizations and multiqueue support over time.

Honestly, the real news is that they're doing it in production, not that they found anything unique.

Heck, all the XDP development I've ever done was against a veth interface on my laptop, to run later on server metal.