Re: [PATCH 2/2] sched/fair: Reimplement NEXT_BUDDY to align with EEVDF goals

[Peter Zijlstra]

On Mon, Oct 27, 2025 at 01:39:15PM +0000, Mel Gorman wrote:
> +enum preempt_wakeup_action {
> +	PREEMPT_WAKEUP_NONE,		/* No action on the buddy */
> +	PREEMPT_WAKEUP_NEXT,		/* Check next is most eligible
> +					 * before rescheduling.
> +					 */
> +	PREEMPT_WAKEUP_RESCHED,		/* Plain reschedule */
> +};

In pre-existing code that isn't modified by this patch, we have:

  if (do_preempt_short)

Which seems to hard rely on PREEMPT_WAKEUP_NONE being 0, please make
that explicit in the enum above.