Il 27/02/2013 18:38, Anthony Liguori ha scritto:
The solution is "there is no way to override a previously specified key". Something like "-device virtio-scsi-pci,num_queues=1,num_queues=2" now works, let's make it an error instead. That breaks compatibility. The above may seem silly but consider:
qemu -device virtio-scsi-pci,num_queues=1,id=foo \ -set device.foo.num_queues=2
This is more common than you would think primarily as a way to override options that libvirt has set either via the qemu extra args tag or a script wrapper of qemu.
"-set" could first delete a pre-existing option. We could also extend "-set" to accept multiple values (like -set device.foo.bar=baz,device.foo.qux=quux), which is useful also to set a list option. Paolo