Dear Wesley,
To not saying that such while loops with MPI_Request_get_status are correct,
means that the application codes doing so are broken.
With adding a new function and explicitly staying again
(same as for MPI_Win_test 20 years ago) that such while loops are
allowed, gives now a clear
This was removed from 4.0 because it was not considered an “emergency fix”.
That’s not to say that it’s not worthwhile and we can’t or shouldn’t do it for
4.1, just that we’re going to remove all changes from the list that are not
required so we can make sure to finish 4.0 in June.
This can
