Re: [libvirt] [PATCH v2] qemu: Do not reattach PCI device used by other domain when shutdown

After thinking a while, even we set the used_by during domains reloading, the other attrs (dev->unbind_from_stub, dev->reprobe, dev->remove_slot) of the PCI dev still will be lost. We can't known what values should be for these attrs as generally they are initialized when do preparation, however the preparations are already passed, and the devices are using by the running domains. And thus the device won't be bound to the original driver (if it had) correctly, or mistakenly bound to some driver but it didn't have one. Perhaps we need some new XMLs introduced for hostdevs.