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Re: [Xen-devel] Question about SR-IOV migration

Thanks for your quick reply and great solution. 
However, I'm still not sure one thing: Do you mean that live migration is impossible because of hardware limitation? I'm reading the SR-IOV specification now. And it mentioned that a VF can migrate to another system through some kind of methods. But the migration may need the support of MR-IOV.
What do you think of the saying in the specification? I'm not sure what the migration is in the specification.

regards, 

2011/11/2 Ian Campbell <Ian.Campbell@xxxxxxxxxx>
On Wed, 2011-11-02 at 06:07 -0400, software NJU wrote:
> Hello,
>   Can HVM using SR-IOV live-migrate to the other Host and still in
> SR-IOV?
>   If SR-IOV can, does Xen support it now? And if so, where is the code
> for it.

It is not possible to live migrate a guest which has a PCI device passed
through to it.

However you can use PCI hotplug to unplug a device right before
migration and reintroduce another (possibly even different) device at
the other end. This requires hotplug to be correctly configured in your
guest to load the right drivers etc in response to hotplug events.

Ian.


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