Messages in this thread | | | Date | Mon, 23 Nov 2015 14:05:33 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH] sched: idle: move need_resched check after function rcu_idle_enter |
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On Sat, Nov 21, 2015 at 01:02:02AM -0800, Lianwei Wang wrote: > The rcu_idle_endter may call wakeup_softirqd to set the need resched > flag on idle process. But if we don't check it after that, then the > cpu will enter idle state with RESCHED flag set and can not be woken > up by wakeup/resched call anymore.
Fair enough; but which cpuidle driver did you observe that with? All the ones I checked test for need_resched again after this.
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