On Tue, Jul 29, 2014 at 01:33:07PM +0200, Peter Zijlstra wrote:
> On Mon, Jul 28, 2014 at 07:37:28PM +0200, Frederic Weisbecker wrote:
> > if (tick_nohz_full_cpu(cpu)) {
> > if (cpu != smp_processor_id() ||
> > tick_nohz_tick_stopped())
>
> Not really a comment on t
On Mon, Jul 28, 2014 at 07:37:28PM +0200, Frederic Weisbecker wrote:
> if (tick_nohz_full_cpu(cpu)) {
> if (cpu != smp_processor_id() ||
> tick_nohz_tick_stopped())
Not really a comment on this patch per-se, but why is that line broken?
If I concat them its on
While we enqueue a new timer on a dynticks target, we must send it an
IPI so that it reschedules the next tick accordingly.
Now all we need for that is to run irq_exit() on the target. Hence
an empty IRQ is way enough. We don't need to run tick_nohz_full_check()
and all the overhead that comes wit
On Sat, Jul 19, 2014 at 03:47:41PM +0200, Peter Zijlstra wrote:
> On Sat, Jul 19, 2014 at 03:18:47PM +0200, Frederic Weisbecker wrote:
> > On Sat, Jul 19, 2014 at 09:19:51AM +0200, Peter Zijlstra wrote:
> > > On Sat, Jul 19, 2014 at 02:44:13AM +0200, Frederic Weisbecker wrote:
> > > > diff --git a/
On Sat, Jul 19, 2014 at 03:18:47PM +0200, Frederic Weisbecker wrote:
> On Sat, Jul 19, 2014 at 09:19:51AM +0200, Peter Zijlstra wrote:
> > On Sat, Jul 19, 2014 at 02:44:13AM +0200, Frederic Weisbecker wrote:
> > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> > > index 7f3063c..f3e48b8 1
On Sat, Jul 19, 2014 at 09:19:51AM +0200, Peter Zijlstra wrote:
> On Sat, Jul 19, 2014 at 02:44:13AM +0200, Frederic Weisbecker wrote:
> > diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> > index 7f3063c..f3e48b8 100644
> > --- a/kernel/sched/core.c
> > +++ b/kernel/sched/core.c
> > @@ -693
On Sat, Jul 19, 2014 at 02:44:13AM +0200, Frederic Weisbecker wrote:
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 7f3063c..f3e48b8 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -693,7 +693,7 @@ static bool wake_up_full_nohz_cpu(int cpu)
> if (tick_noh
While we enqueue a new timer on a dynticks target, we must send it an
IPI so that it reschedules the next tick accordingly.
Now all we need for that is to run irq_exit() on the target. Hence
an empty IRQ is way enough. We don't need to run tick_nohz_full_check()
and all the overhead that comes wit
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