Sorry for that. I planed to use the existing method in qemu to add some new
mechanism after migration.

Does qemu have a IPC channel to communicate during migration?


On Mon, Jun 30, 2014 at 11:13 AM, Paolo Bonzini <pbonzini@redhat.com> wrote:

> Il 30/06/2014 16:47, Xiongzi Ge ha scritto:
>
>  Hi,
>> I mean this function will be called after migration to do something for
>> the block device. I tried and debugged the qemu code. (like you have a
>> qcow2 format device. This function will be called. We can put anything
>> we want here. We can reopen a new device.  We have a new format block
>> device which has a cache created by myself. I can modify and control the
>> cache after migration. Do you have any suggestions? Thanks. )
>>
>
> As long as the cache is entirely in QEMU, yes.  This was not what your
> earlier messages implied.
>
> Paolo
>