Re: [Qemu-devel] qgraph

[Markus Armbruster]

Paolo Bonzini <address@hidden> writes:

> On 11/06/19 10:56, Markus Armbruster wrote:
>> Yes, this is how introspection (both QMP and QOM) is commonly used.
>> Just keep in mind one difference: QMP is static, QOM is dynamic.
>> 
>> QMP being static means it's defined at compile time.  So is the value of
>> query-qmp-schema.  Same QEMU build, same value.  This permits caching.
>> 
>> QOM being dynamic means to introspect an object's properties, you have
>> to create it.  Worse, an object's properties may (in theory) change at
>> any time.  *Properties*, not just property *values*.  In practice, I'd
>> expect properties to change only at realize time.
>
> Right, and we should move more towards class-based properties so that
> the dynamic nature of QOM is only used for the bare minimum needed (e.g.
> memory regions).

What are we doing to make new code conform to that?

What are we doing to update existing code?