On 2011-06-09 22:00, Anthony Liguori wrote: > On 06/09/2011 11:44 AM, Jan Kiszka wrote: >> A first step towards getting rid of register_device_unmigratable >> (ivshmem and lacking vmstate support in virtio are blocking this): >> >> Allow to register an unmigratable vmstate via qdev, i.e. tag a device >> declaratively. > > I thought part of the problem with this was that for some devices (like > ivshmem), whether it can be migrated was dynamic. It depends on > configuration, state, etc.
That only applies to ivshmem (the other user is device assignment which is unconditionally unmigratable). And the ivshmem issue could easily be solved by defining two devices, ivshmem-peer (or just ivshmem) and ivshmem-master, eliminating the need for the role property. I don't think there will ever be a use case for a "transformer" device that becomes unmigratable during runtime (would be a nightmare for management apps anyway). If breaking the user interface of ivshmem for this is OK, I'll post a patch. Jan
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