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  • Dominik Bartkiewicz's avatar
    Prevent a race between completing jobs on a user-exclusive node from leaving the node owned. · cd9ff91b
    Dominik Bartkiewicz authored 
    Two jobs completing simultaneously leads to make_node_idle()
returning before it has a chance to decrement node_ptr->owner_job_cnt,
which can result in the node being "owned" by that user even
through no jobs are running on it.

Move the decrement block to the end at a fini label, and make sure
all return paths pass through it. While moving that add a guard
against node_ptr->owner_job_cnt underflowing.

Bug 3771.
    cd9ff91b
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