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In case that after the gathering of sched domain statistics the current load balancing operation is still in energy-aware mode, just return the least efficient (costliest) reference. That implies the system is considered to be balanced in case no least efficient sched group was found. cc: Ingo Molnar <mingo@redhat.com> cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
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