> out is usually a single byte. Shouldn't be very expensive > to decode. In fact it should be roughly equivalent to your > hypercall multiplex. Why is a performance critical path on a paravirt kernel even using I/O instructions and not paravirtual device drivers ? It clearly makes sense to virtualise I/O operations if you are doing that (so you can do posting, triggers and predicted reply handling guest side to keep the trap rate sane) but I don't see why this situation occurs in the first place for paravirt. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
