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V4.0.x PML/UCX: don't do pml check during add_proc #8406
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V4.0.x PML/UCX: don't do pml check during add_proc #8406
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Please add the usual cherry-pick line in the commit message.
I.e., the same line as you get with git cherry-pick -x ... to get the commit from master.
Thanks!
| 
 @jsquyres it is not cherry-pick because master and v4.0.x diverged a bit. Do you mean, just add the similar line with master commit hash? | 
| @vspetrov Ah, my mistake. If it's not a cherry pick, then you are absolutely correct that you should not list it as a cherry pick. But it probably would be good to cite the master hash/the general situation that occurred here, because -- at least on the surface -- the code change looks pretty similar between master and here, even if the surrounding code context is different. Cool? | 
| 
 Do you want master hash in commit itself or the PR (in PR desc i'm referencing master PR) ? I can add master hash to commit once master PR is merged (to make sure commit does not change) | 
| Putting it in the commit message would be great -- that helps when we have to go spelunking through the git log to figure out what happened / what commits got cherry-picked or otherwise pulled over to release branches, etc. Thanks! Don't forget to get these PRs reviewed; they can't be merged until they're reviewed. | 
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    Current implementation of pml check protocol causes extra dmodex exchanges that may result in a significant performance degradation for some workloads (corresponds to master 36b64cb) Signed-off-by: Valentin Petrov <valentinp@nvidia.com>
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    Now that this is out of draft, I can dismiss the now-moot request for changes (because this is not technically a cherry pick).
| what is needed for merge? | 
| @vspetrov is this PR in response to a user reported problem, or perhaps the VASP performance thing? In any case we typically want to thank whoever noted the issue in the NEWS, hence the question. | 
| Might also want to re-run the problem application after #8408 is committed to see if it resolves the issue on its own. | 
| @rhc54 i confirm that #8408 on its own fixes issue for given VASP repro. | 
| @vspetrov Do you agree that we can now close this without merging? | 
| @gpaulsen this should be merged. The same issue would be present in v4.0.x. Val's fix was merged into v4.1.x. | 
V4.0.x of #8404