Re: [Qemu-devel] [RFC]VM live snapshot proposal

[Paolo Bonzini]

Il 03/03/2014 13:55, Kevin Wolf ha scritto:
> > > > > Due to memory-modifications may happen in kvm, qemu, or vhost, the key-part 
> > > is how we
> > > > > can provide common page-modify-tracking-and-saving api, we completed a 
> > > prototype by
> > > > > simply add modified-page tracking/saving function in qemu, and it seems 
> > > worked fine.
> > >
> > > Yes, this is the tricky part.  To be honest, I think this is the reason
> > > no one has submitted patches - it's a hard task and the win isn't that
> > > great (you can already migrate to file).
> So why don't we simply reuse the existing migration code?

I think this is different in the same way that block-backup and 
block-mirror are different.  Huangpeng's proposal would let you make a 
consistent snapshot of disks and RAM.

Paolo