On Apr 29, 2014, at 10:20 PM, Jeff Hammond <[email protected]> wrote:

Yeah, I know that's what MPICH gives me. My point is that is undesirable. All sync operations should make progress, no matter what.

They are not required to make progress from the spec perspective. It’s a bad assumption to make that Win_flush will always make progress. I think it’s OK for it to be mostly a no-op when there are no operations posted. If you need progress, why don’t you use test or something similar? — Pavan