Re: [RFC v3] VFIO Migration

[Cornelia Huck]

On Tue, 10 Nov 2020 09:53:49 +0000
Stefan Hajnoczi <stefanha@redhat.com> wrote:

(...)

> The meaning of the migration parameter and its possible values are specific to
> the device, but values are based on one of the following types:
> * bool - booleans (on/off)
> * int - integers (0, 1, 2, ...)
> * str - character strings
> 
> Migration parameters are represented as <name>=<value> in this document.
> Examples include my-feature=on and num-queues=4.
> 
> When a new migration parameter is introduced, its absence must have the same
> effect as before the migration parameter was introduced. For example, if
> my-feature=on|off is added to control the availability of a new device 
> feature,
> then my-feature=off is equivalent to omitting the migration parameter.

Maybe this could be made more clear by using a non-bool parameter as
an example?

For the num-queues parameter used as an example above, if num-queues=2
would lead to the same effect as before, omitting the num-queues
parameter must be treated as if num-queues had been specified as 2.