Jeremiah made the point that the text says that an MPI implementation behaves as if it makes a copy of the buffer. He says that this implies that it trumps the "user can't modify a non-blocking sending buffer while the operation is ongoing" rule -- since the user can't modify the copy, it might be inferred that the user can go modify the original. I think our text is weak but ok. The clarification doesn't hurt, though. On Sep 10, 2012, at 1:28 PM, Richard Graham wrote:

Certainly, However, if we can come to some agreement over e-mail, this might be better, so we can put the final doc before folks sooner rather than later. I went back and read the two paragraphs that you mention - why is this additional clarification needed ? I don't follow from the context, though the statement seems innocuous.

Rich

-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Squyres Sent: Monday, September 10, 2012 11:43 AM To: MPI Forum list Subject: [Mpi-forum] Fortran change for discussion

Rich --

Per Jeremiah Willcock's comments, we'd like to add one small clarifying paragraph to the Fortran section. I think it's totally safe, but it's somehow intangibly above the "chapter author can add it himself" threshold for me. Specifically: I think the current text is a little weak, but sufficient. I'm therefore on the fence as to whether the text is *needed* in MPI-3.0 or whether it could be pushed to MPI next.

Can this be added to the agenda during the discussion of user comments for the MPI-3.0 draft 2?

Here's the specific proposal:

...

I propose adding the following paragraph after the big paragraph in draft 2 p628:27-44:

Note that the above definition does not supercede restrictions about buffers used with non-blocking operations (e.g., those specified in Section~\ref{subsec:pt2pt-commstart}).

-- Jeff Squyres [email protected] For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/

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-- Jeff Squyres [email protected] For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/