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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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[PATCH] sched: idle: move need_resched check after function rcu_idle_enter Lianwei Wang <lianwei.wang@gmail.com> - 2015-11-21 10:10 +0100
  Re: [PATCH] sched: idle: move need_resched check after function  rcu_idle_enter Peter Zijlstra <peterz@infradead.org> - 2015-11-23 14:10 +0100
    Re: [PATCH] sched: idle: move need_resched check after function rcu_idle_enter Lianwei Wang <lianwei.wang@gmail.com> - 2015-11-23 18:50 +0100
      Re: [PATCH] sched: idle: move need_resched check after function  rcu_idle_enter Peter Zijlstra <peterz@infradead.org> - 2015-11-23 19:00 +0100
        Re: [PATCH] sched: idle: move need_resched check after function rcu_idle_enter Lianwei Wang <lianwei.wang@gmail.com> - 2015-11-23 21:10 +0100
  Re: [PATCH] sched: idle: move need_resched check after function  rcu_idle_enter Peter Zijlstra <peterz@infradead.org> - 2015-11-23 19:00 +0100

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