Re: [PATCH v2] cpufreq/schedutil: Cleanup, document and fix iowait boost

From: Viresh Kumar
Date: Wed Apr 11 2018 - 10:54:18 EST


On 11-04-18, 15:39, Patrick Bellasi wrote:
> On 11-Apr 12:58, Peter Zijlstra wrote:
> > On Wed, Apr 11, 2018 at 11:44:45AM +0100, Patrick Bellasi wrote:
> > > > > - sugov_set_iowait_boost: is now in charge only to set/increase the IO
> > > > > wait boost, every time a task wakes up from an IO wait.
> > > > >
> > > > > - sugov_iowait_boost: is now in charge to reset/reduce the IO wait
> > > > > boost, every time a sugov update is triggered, as well as
> > > > > to (eventually) enforce the currently required IO boost value.
> > > >
> > > > I'm not sold on those function names; feels like we can do better,
> > > > although I'm struggling to come up with anything sensible just now.
> > >
> > > What about something like:
> > >
> > > sugov_iowait_init()
> > > since here we are mainly initializing the iowait boost
> > >
> > > sugov_iowait_boost()
> > > since here we are mainly applying the proper boost to each cpu
> > >
> > > Although they are not really so different...
> >
> > How about:
> >
> > sugov_iowait_boost() -- does the actual impulse/boost
> > sugov_iowait_apply() -- applies the boost state
> >
> > ?
>
> Whould say it can work too, and it also allows to add a:
>
> sugov_iowait_reset() -- resets boots state after
> TICK_NSEC CPU idle time
>
> Viresh, Rafael, Joel: any preferences or other suggestions?

Looks like no matter how we rename it, someone will find it confusing
:)

--
viresh