On Oct 24, 2019, at 11:15 AM, Rolf Rabenseifner <rabenseifner@hlrs.de> wrote:

For me, it looked like that there was some misunderstanding
of the concept that absolute and relative addresses
and number of bytes that can be stored in MPI_Aint.  

...with the caveat that MPI_Aint -- as it is right now -- does not support modern segmented memory systems (i.e., where you need more than a small number of bits to indicate the segment where the memory lives).

I think that changes the conversation entirely, right?

-- 
Jeff Squyres
jsquyres@cisco.com