Re: [Qemu-devel] Live Migration with different block devices

[Brian Jackson]

On 6/24/2014 2:22 PM, Xiongzi Ge wrote:
> Hi,
>
>
> When I do live migration, in the source and destination host, there are
> different block devices, but qemu can not detect this. I used virtio as the
> driver in kvm and in the vdi device in the guest is /dev/vda.  So,  the vm
> guest can read different data from the same /dev/vda device.  I am studying
> this code to let qemu understand that, this is a new device.
>
> Does qemu recognize different block devices after live migration?

You aren't supposed to have different command line options when live 
migrating (with the exception of -incoming if you migrate that way). So 
whatever you are trying to do is unsupported.

> Where is
> the interface to modify this? Thanks
>
>
> Gary