On Fri, Jul 23, 2021 at 09:01:42PM +0200, David Hildenbrand wrote: > It can happen in corner cases and is valid: with the current virtio-mem > spec, guests are allowed to read unplugged memory. This will, for example, > happen on older Linux guests when reading /proc/kcore or (with even older > guests) when dumping guest memory via kdump. These corner cases were the > main reason why the spec allows for it -- until we have guests properly > adjusted such that it won't happen even in corner cases. > > A future feature bit will disallow it for the guest: required for supporting > shmem/hugetlb cleanly. With that in place, I agree that we would want to > warn in this case!
OK that makes sense; with the page_size change, feel free to add: Reviewed-by: Peter Xu <pet...@redhat.com> -- Peter Xu
