On Wed, 2009-07-08 at 13:04 +0300, Avi Kivity wrote: > > In this case how can hooking the hashes work? > > kvm obtains pages by calling get_user_pages_fast() so you can have a > page in the shadow hash which is not present in the host hash. > I'm not sure why we would have a problem with that actually. But again, it depends how Alex does his stuff... We -must- keep track that a given Linux PTE was hashed, we must not put something into the hash without keeping that track or bad things will happen such as potential duplicates etc... We have fields in the PTE for that though I would have to understand how Alex handles translated entries there. If a guest entry is in the real hash, we thus must have some tracking in the linux PTE that this guest entry is there to properly invalidate it when the PTE is invalidated. Now we could probably use the mmu_notifiers for that, but we have existing mechanism to do that tracking and I think we might just be able to re-use them, but of course, that needs to be looked at it more details. Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
