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    SubjectQuestion on build_sched_domains
    I was going thr' build_sched_domains and had a question
    regarding formation of sched_groups for NUMA nodes. There are two 'for'
    loops, each loop possibly allocating memory (sched_group) for one or more nodes.
    My question is: in the outer loop, don't we need to skip allocating for
    nodes for whom the inner loop has allocated in an earlier pass?

    Taking the example of 4 node system which are in the same
    sched_domain_node_span(), I see that we end up allocating 16
    times (when 4 would have sufficed?).

    What am I missing here?

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