Migration Pull request In this try - rebase to latest upstream - same than previous patch - fix compilation on non linux (userfaultfd.h) (me) - query-migrationthreads (jiang) - fix race on reading MultiFDPages_t.block (zhenzhong) - fix flush of zero copy page send reuest (zhenzhong) Please apply. Previous try: It includes: - David Hildenbrand fixes for virtio-men - David Gilbert canary to detect problems - Fix for rdma return values (Fiona) - Peter Xu uffd_open fixes - Peter Xu show right downtime for postcopy - manish.mishra msg fix fixes - my vfio changes. Please apply.