Hui Zhou comments

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                                            Hui Zhou

ch4: use am_tag_{send,recv} in RMA get/put

test:mpich/ch4/ucx test:,mpich/ch4/ofi/more

ch4: use am_tag_{send,recv} in RMA get/put

test:mpich/ch4/most test:mpich/ch4/ofi/more

ch4: use am_tag_{send,recv} in RMA get/put

test:mpich/ch4/most test:mpich/ch4/ofi/more

ch4: use am_tag_{send,recv} in RMA get/put

> @hzhou can you rebase this on `main` and resolve conflicts? Now that some GPU fixes are in to resolve memory issues, we are hoping this will now fix #7118...

ch4: use am_tag_{send,recv} in RMA get/put

Updated.

hang in init with high ppn

The top suggestion is to try Openpmix latest release (5) to see if the issue reproduces.

hang in init with high ppn

Note: while the PMIx_fence issue is not resolved, a work around is to do a PMI_Barrier at init, which prevents the PMIX_fence leak.

pmix: hint pmix not to spawn threads

test:mpich/pmi

pmix: hint pmix not to spawn threads

Labeled `do-not-merge` for now until we fully understand the impact. Reference information from PMIx: https://github.com/openpmix/openpmix/issues/3617

pmix: hint pmix not to spawn threads

Hi Ralph, appreciate you reaching out to us. We should schedule discussions offline sometime. Some context - * So far, MPICH is only using PMIx as an alternative for PMI-1....