Messages in this thread | | | Date | Thu, 19 Nov 2015 20:06:30 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 2/4] timer: relax tick stop in idle entry |
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On Mon, Nov 16, 2015 at 04:09:10PM -0800, Jacob Pan wrote: > On Mon, 16 Nov 2015 23:01:12 +0100 (CET) > Thomas Gleixner <tglx@linutronix.de> wrote: > > > > For the second case, which is much more rare, I think we do have > > > next timer exactly one tick away. Just don't know why tick will > > > continue into idle loop. > > > > Well, it should not be hard to figure that out. There are not so many > > checks involved when tick_nohz_irq_exit() is called.
> Thanks for the tip, I found the cause is in > int idle_cpu(int cpu)
Which one? That is, I cannot find a idle_cpu() call from tick_nohz_irq_exit().
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