> I seem to remember a virtulisation session at OLS 2008 where the discussion was
> both Xen and KVM moving to common paravirtualised drivers for guests to speed
> up I/O. Isn't this basically the same thing?
Its the same in terms of these are also PV drivers. Its different in that this is much faster PV
infrastructure than the currently deployed versions. Ideally we will be able to use the same
drivers and just swap out the inefficient part in the hypervisor side. As of right now, the drivers
are also different (venet vs virtio-net), but this may change in the future.
In addition, it is also infrastructure that allows us to do new kinds of PV operations, such as
supporting real-time guests.
(Note: the graphs posted are against the virtio-net based PV drivers that were probably the
result of that presentation you saw at OLS)