Re: [PATCH v2 1/4] sched/uclamp: Make uclamp_util_*() helpers use and return UL values

[Rainer Sickinger]

You can just use Math.clamp for that!
Idiots.

RAINER

Am Mi., 4. Dez. 2019 um 17:13 Uhr schrieb Vincent Guittot
<vincent.guittot@xxxxxxxxxx>:
>
> On Wed, 4 Dec 2019 at 17:03, Valentin Schneider
> <valentin.schneider@xxxxxxx> wrote:
> >
> > On 04/12/2019 15:22, Vincent Guittot wrote:
> > >> @@ -2303,15 +2303,15 @@ static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) {}
> > >>  unsigned int uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id);
> > >
> > > Why not changing uclamp_eff_value to return unsigned long too ? The
> > > returned value represents a utilization to be compared with other
> > > utilization value
> > >
> >
> > IMO uclamp_eff_value() is a simple accessor to uclamp_se.value
> > (unsigned int), which is why I didn't want to change its return type.
> > I see it as being the task equivalent of rq->uclamp[clamp_id].value, IOW
> > "give me the uclamp value for that clamp index". It just happens to be a
> > bit more intricate for tasks than for rqs.
>
> But then you have to take care of casting the returned value in
> several places here and in patch 3
>
> >
> > uclamp_util() & uclamp_util_with() do explicitly return a utilization,
> > so here it makes sense (in my mind, that is) to return UL.