V4.0.x Fixes the O(N^2) loop in the mca_scoll_mpi_comm_query #6585
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The new proc group is created from the "world_group" based on the
ranks mapping which can be directly taken from proc_name->vpid.
Signed-off-by: Valentin Petrov <[email protected]>
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V4.0.x of #6574
Signed-off-by: Valentin Petrov [email protected]