[openib-general] Reserved L_Key API

[Roland Dreier]

    Michael> Dont you want to basically create a physical memory
    Michael> region covering the whole 64 bit range, and then post
    Michael> full phy addresses in the WQE?  Cant you do exactly that
    Michael> with existing API?

Yes, that's the natural thing to try.  However, as understand it,
Tavor is limited to 2 GB pages, which means covering the whole 64-bit
range is going to take 8 billion pages, which clearly will overflow
any conceivable context memory.  Other devices are likely to have
similar limitations.

 - Roland