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RE: [RFC qemu 0/4] A PV solution for live migration optimization

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> > This patch set is the QEMU side implementation.
> >
> > The virtio-balloon is extended so that QEMU can get the free pages
> > information from the guest through virtio.
> >
> > After getting the free pages information (a bitmap), QEMU can use it
> > to filter out the guest's free pages in the ram bulk stage. This make
> > the live migration process much more efficient.
> >
> > This RFC version doesn't take the post-copy and RDMA into
> > consideration, maybe both of them can benefit from this PV solution by
> > with some extra modifications.
> 
> I like the idea, just have to prove (review) and test it a lot to ensure we don't
> end up skipping pages that matter.
> 
> However, there are a couple of points:
> 
> In my opinion, the information that's exchanged between the guest and the
> host should be exchanged over a virtio-serial channel rather than virtio-
> balloon.  First, there's nothing related to the balloon here.
> It just happens to be memory info.  Second, I would never enable balloon in
> a guest that I want to be performance-sensitive.  So even if you add this as
> part of balloon, you'll find no one is using this solution.
> 
> Secondly, I suggest virtio-serial, because it's meant exactly to exchange free-
> flowing information between a host and a guest, and you don't need to
> extend any part of the protocol for it (hence no changes necessary to the
> spec).  You can see how spice, vnc, etc., use virtio-serial to exchange data.
> 
> 
> 		Amit

Hi Amit,

 Could provide more information on how to use virtio-serial to exchange data?  Thread , Wiki or code are all OK. 
 I have not find some useful information yet.

Thanks
Liang

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Re: [RFC qemu 0/4] A PV solution for live migration optimization Amit Shah <amit.shah@redhat.com> - 2016-03-08 12:20 +0100
  RE: [RFC qemu 0/4] A PV solution for live migration optimization "Li, Liang Z" <liang.z.li@intel.com> - 2016-03-08 14:20 +0100
  RE: [RFC qemu 0/4] A PV solution for live migration optimization "Li, Liang Z" <liang.z.li@intel.com> - 2016-03-10 08:50 +0100
    Re: [RFC qemu 0/4] A PV solution for live migration optimization Amit Shah <amit.shah@redhat.com> - 2016-03-10 09:00 +0100
      RE: [RFC qemu 0/4] A PV solution for live migration optimization "Li, Liang Z" <liang.z.li@intel.com> - 2016-03-10 09:40 +0100
        Re: [RFC qemu 0/4] A PV solution for live migration optimization "Dr. David Alan Gilbert" <dgilbert@redhat.com> - 2016-03-10 12:20 +0100
          RE: [RFC qemu 0/4] A PV solution for live migration optimization "Li, Liang Z" <liang.z.li@intel.com> - 2016-03-11 03:40 +0100
            Re: [RFC qemu 0/4] A PV solution for live migration optimization "Dr. David Alan Gilbert" <dgilbert@redhat.com> - 2016-03-14 18:10 +0100
              RE: [RFC qemu 0/4] A PV solution for live migration optimization "Li, Liang Z" <liang.z.li@intel.com> - 2016-03-15 04:40 +0100
              Re: [RFC qemu 0/4] A PV solution for live migration optimization "Michael S. Tsirkin" <mst@redhat.com> - 2016-03-15 11:40 +0100
                RE: [RFC qemu 0/4] A PV solution for live migration optimization "Li, Liang Z" <liang.z.li@intel.com> - 2016-03-15 12:20 +0100
                Re: [RFC qemu 0/4] A PV solution for live migration optimization "Dr. David Alan Gilbert" <dgilbert@redhat.com> - 2016-03-15 21:00 +0100
                RE: [RFC qemu 0/4] A PV solution for live migration optimization "Li, Liang Z" <liang.z.li@intel.com> - 2016-03-16 02:30 +0100

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