[libvirt-users] (Live) Migration safe vs. unsafe

Hi all, virsh checks whether a (live) migration is safe or unsafe. When a migration is considered to be unsafe it is rejected unless the --unsafe option is prodivided. As a part of those checks virsh considers the cache settings for the underlying storage resources. In this context only cache="none" is considered to be safe. I wonder why cache="directsync" might be harmfull as it bypasses the host page cache completely. Regards, Michael