Re: [Qemu-devel] [RFC PATCH 0/2] live backup vm

[Paolo Bonzini]

> So our snapshot implementation uses the following steps:
> 
> 1.) qmp: savevm-start [statefile]
> 
> This save the VM state into [statefile] and then stops the VM.

That's migrate exec:cat>statefile (or similar)

> 2.) qga freezefs

How can freezefs run while the VM is stopped?

> 3.) create snapshots: either using external tools or by qmp:
> snapshot-drive
> 
> 4.) gqa unfreezefs

Same as above, this should be done after step (5).

> 5.) qmp: savevm-end
> 
> This restarts/resumes the VM

That's simply "cont".

Paolo