Re: [Qemu-devel] question about live migration with storage

[Paolo Bonzini]

On 15/01/2015 10:56, Zhang Haoyu wrote:
> I see, when waiting the completion of drive_mirror IO, the coroutine will be
> switched back to main-thread to poll and process other events, like qmp 
> request,
> then after the IO completed, coroutine will be switched back in main-loop 
> process, right?
> 
> Another question:
> while starting to migrate storage, will the unused sector be allocated and 
> transferred?
> regarding the thin-provisioning qcow2 disk, will extra large IO requests be
> performed, and more data be transferred for the unallocated clusters?

No.

Paolo