Re: Re: [PATCH 2/2] sched/fair: Fix premature check of WAKEUP_PREEMPTION

[Vincent Guittot]

On Tue, 25 Feb 2025 at 07:29, Abel Wu <wuyun.abel@xxxxxxxxxxxxx> wrote:
>
> On 2/24/25 9:47 PM, Vincent Guittot wrote:
> >
> > Or we should just remove it. I'm curious to know who used it during
> > the last couple of years ? Having in mind that lazy preemption adds
>
> TBH I have never used this feature. But since Phil mentioned a case
> in debugging DELAY_DEQUEUE, I think we'd better keep it, what do you
> think?

Yes. And we need to figure out how to deal with the below as well

>
> > another level as check_preempt_wakeup_fair()  uses it so sched-idle
> > tasks might not always be immediately preempted anyway.
>
> Right, thanks for mention that.
>
> >
> >
> >>
> >> Thanks,
> >>          Abel
> >>
>