[libfabric-users] mmap'ed kernel memory in fi_mr_reg

[Hefty, Sean]

> I am happy with this being a provider-specific extension for now. The
> project that requires this will anyway only use the verbs provider.
> 
> I do not think there is a fully reliable way of distinguishing
> physical/virtual addresses. I spoke with our driver expert here who
> cannot think of a way either. The provider-specific flag seems to be
> the way to go, what do you think?

I agree this works fine.

The only alternative I can think of is to try a normal registration call, and if that fails, try again using the physical flag.  Would this work, or does the normal registration call succeed, but produce an unusable MR?

- Sean