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

[Tianchen Ding]

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
> another level as check_preempt_wakeup_fair()  uses it so sched-idle
> tasks might not always be immediately preempted anyway.

I just remembered that I've mentioned this issue in another thread[1] 
before. Can we do preempt SCHED_IDLE immediately even in PREEMPT_LAZY? (to 
achieve better response time for SCHED_NORMAL)

[1] 
https://lore.kernel.org/all/8e6f02a0-2bd0-4e75-9055-2cb7c508ce4e@xxxxxxxxxxxxxxxxx/