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进程调度之优先级详解...
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@@ -582,5 +582,7 @@ rev->sched_class == class && rq->nr_running == rq->cfs.h_nr_running
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##context_switch进程上下文切换
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http://abcdxyzk.github.io/blog/2014/05/22/kernel-sched-tick/
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##need_resched与TIF_NEED_RESCHED标识
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