[Mpi3-rma] MPI-3 UNIFIED model clarification

[Jed Brown]

"Underwood, Keith D" <keith.d.underwood at intel.com> writes:

> At one point, them using their own memory fences was accepted as part
> of it, because it provides " the performance and "safety" of threads,
> localized to a window".  Those same people have to use memory fences
> for threads to work right too.

Then what were you trying to say here:

>> > Oh, I think we want it to say that they are identical.  I believe
>> > that is the only way to let the user actually use it.

"identical" means located at the same memory address, but the user is
responsible for memory ordering if they don't use MPI_Win_sync?
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