Re: [RFC PATCH 01/10] timer: Prevent base->clk from moving backward

Frederic Weisbecker
2020-07-02T14:32:11Z

On Thu, Jul 02, 2020 at 11:59:59AM +0200, Juri Lelli wrote:
> On 02/07/20 01:20, Frederic Weisbecker wrote:
> > On Wed, Jul 01, 2020 at 06:35:04PM +0200, Juri Lelli wrote:
> > > Guess you might be faster to understand what I'm missing. :-)
> >
> > So, did you port only this patch or the whole set in order to
> > trigger this?
> >
> > If it was the whole set, can you try this patch alone?
>
> Whole set. And I can't reproduce if I try with this patch alone.
>

Missing initialization. This should go better after this:

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 25a55c043297..f36b53219768 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1969,6 +1969,7 @@ static void __init init_timer_cpu(int cpu)
base->cpu = cpu;
raw_spin_lock_init(&base->lock);
base->clk = jiffies;
+ base->next_expiry = base->clk + NEXT_TIMER_MAX_DELTA;
timer_base_init_expiry_lock(base);
}
}