[openib-general] Re: librdmacm/ucma

[Sean Hefty]

Michael S. Tsirkin wrote:
> In normal usage I expect we must not break the ABI, but should rather
> extend it - without breaking userspace. How do you extend the ABI?
> not by bumping the ABI revision? How does userspace find out
> whether kernel supports new features?

If the ABI didn't break, can't userspace just make the call for the new feature 
and check the return code?

- Sean