On 12/11/2018 17:50, Dr. David Alan Gilbert wrote: >> Migration has always been busted historically, so those people using >> nested VMX already won't be hurt by not having ability to live migrate >> their VM, but could otherwise continue using them without being forced >> to upgrade their kernel to fix a feature they're not even using. > Yes, although I am a bit worried we might have a population of users > that: > a) Have enabled nesting > b) Run VMs with vmx enabled > c) Don't normally actually run nested guests > d) Currently happily migrate. Hmm, let's add a migration blocker for nested virtualization. Paolo