Re: [PATCH 13/23] sched,ion: Convert to sched_set_normal()

[Vincent Guittot]

On Wed, 22 Apr 2020 at 17:39, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>
> On Wed, Apr 22, 2020 at 05:09:15PM +0200, Vincent Guittot wrote:
> > > It's not unbounded, like a true idle-time scheduler would be, but it can
> > > still be pretty horrible. nice19 has some of that too of course, but
> > > idle has it worse, esp. also because it begs others to preempt it.
> >
> > Yeah... you have to pay the benefit of letting other tasks to preempt
> > faster. But both sched_idle and nice19 have the same weight
>
> #define WEIGHT_IDLEPRIO         3
>
>  /*  15 */        36,        29,        23,        18,        15,
>
> 15 != 3

Good point
Don't know why I thought they had same weight

>
> Also, like said elsewhere, idle is much more eager to let itself be
> preempted.