in oVirt 4.1 I could enable I/O threads for a VM and then there was a field where I could define how many I/O threads (aka virtual scsi controllers from vm point of view).

In 4.2 now I see only the option to enable them but not to specify the number.

Next to the setting there is a symbol and a mouseover says "the field is not attached to any instance type"

See this screenshot for the Edit VM -> Resource Allocation content:

Any hints for setting the number?

Thanks in advance,

Gianluca