Re: [PATCH v2 0/2] Fix SCHED_IDLE behavior on wakeup preemption

[K Prateek Nayak]

Hello Abel,

On 2/27/2025 2:28 PM, Abel Wu wrote:
> The commit 6bc912b71b6f ("sched: SCHED_OTHER vs SCHED_IDLE isolation")
> defines the behavior of SCHED_IDLE as following:
>
>   - no SCHED_IDLE buddies
>   - never let SCHED_IDLE preempt on wakeup
>   - always preempt SCHED_IDLE on wakeup
>   - limit SLEEPER fairness for SCHED_IDLE
>
> and the middle two of them are broken now.

Feel free to include:

Tested-by: K Prateek Nayak <kprateek.nayak@xxxxxxx>
--
Thanks and Regards,
Prateek

> v2:
>   - Collect Reviewed-by tags from Vincent, Josh and Madadi, thanks!
>   - Rebased to up-to-date tip. (Madadi)
>   - Folded some discussion with Vincent into commit log.
>
> Abel Wu (2):
>    sched/fair: Do not let idle entities preempt others
>    sched/fair: Fix premature check of WAKEUP_PREEMPTION
>
>   kernel/sched/fair.c | 14 ++++++++------
>   1 file changed, 8 insertions(+), 6 deletions(-)