Cherry pick ob1 fixes to release branches

[jsquyres]

Need to cherry-pick the commits from the PRs listed below to v2.x, v3.0.x, v3.1.x, and v4.0.x:

• pml/ob1: fixed local handle sent during PUT control message #6556 (e630046): pml/ob1: fixed local handle sent during PUT control message
• Fix the leak of fragments for persistent sends (issue #6565) #6621 (a16cf0e): Fix the leak of fragments for persistent sends

Note that a16cf0e contains use of OPAL_THREAD_SUB_FETCH_SIZE_T and OPAL_THREAD_ADD_FETCH_SIZE_T, neither of which exist before v4.0.x. Porting to the older branches is therefore a bit complex -- I took a whack at it and was not confident enough in what I finally managed to get to compile.

[jsquyres]

FYI: @EmmanuelBRELLE

[bosilca]

I'm working on a fix for the PUT issue. If there is no rush to push this in, let's wait for few days until I'm done.

[jsquyres]

@bosilca Any updates? We're looking at the possibility of 4.0.2 in the "near" future.

[bosilca]

Not enough hours in a day. I'm on the datatype issue right now, so I put this one aside. I might get to it before the end of the week.

[gpaulsen]

@bosilca Any updates? We're looking at the possibility of 4.0.2 in the "near" future.

[angelhd1999]

Same problem here, the only "solution" I have found is to do:

export OMPI_MCA_btl_vader_backing_directory=/tmp

before the mpirun execution.

Can I do something if I do not want to type that export at every run?

Thank you!

[jsquyres]

mpirun --mca btl_vader_backing_directory /tmp ... should be equivalent. You can also set MCA params in a file -- see https://www.open-mpi.org/faq/?category=tuning#setting-mca-params.

[gpaulsen]

PR #6634 cherry-picks these two fixes to v4.0.x branch.
Removing the Target: v4.0.x label to reflect that.

[gpaulsen]

@jsquyres Have these fixes been backported to v3.1.x and v3.0.x? Can we close this Issue?

[awlauria]

I think this can be closed?

[awlauria]

Closing - this went into the 4.0 series and is in master. 3.0 is closed as far as I know. If someone disagrees, please reopen.