Re: [RFC v4 22/22] timekeeping: inform clockevents about freq adjustments

From: Thomas Gleixner
Date: Thu Aug 25 2016 - 11:00:25 EST


On Tue, 23 Aug 2016, Nicolai Stange wrote:
> Upon adjustments of the monotonic clock's frequencies from the
> timekeeping core, the clockevents devices' ->mult_adjusted should be
> changed accordingly, too.
>
> Introduce clockevents_adjust_all_freqs() which traverses all registered
> clockevent devices and recalculates their ->mult_adjusted based on the
> monotonic clock's current frequency.

I'm not sure whether adjusting all devices is a good idea. We have systems
where the clockevent device is operated from a totally different crystal than
the clocksource device which is used for timekeeping. At least we want an
opt-out flag for this.

Thanks,

tglx