Alan Cox wrote: > > - Stacked hypervisors stomping each others functions > Possibly an issue, but why would you ever want stacked paravirt-ops? You're only talking to the hypervisor directly above you, and there is only one of those. > - Locking required to do updates: and remember our lock functions use > methods in the array > Yes, locking is an issue, but it is possible to do. You just need to stop interrupts, NMIs, and faults on all processors simultaneously. Actually, it's not that scary - since you'll be doing it in a hypervisor. > - If we boot patch inline code to get performance natively its almost > impossible to then revert that. > You can patch back over it. I've already implemented the locking and repatching bits for VMI. Zach
