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

[Peter Zijlstra]

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

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