sched: Add support for unthrottling group entities
At the start of each period we refresh the global bandwidth pool. At this time we must also unthrottle any cfs_rq entities who are now within bandwidth once more (as quota permits). Unthrottled entities have their corresponding cfs_rq->throttled flag cleared and their entities re-enqueued. Signed-off-by: NPaul Turner <pjt@google.com> Reviewed-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20110721184757.574628950@google.comSigned-off-by: NIngo Molnar <mingo@elte.hu>
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