Re: [PATCH] sched_ext: add unlikely() hints in do_enqueue_task() hot path

[Tejun Heo]

Hello,

On Thu, Feb 26, 2026 at 10:44:25PM +0000, David Carlier wrote:
> @@ -1360,10 +1360,10 @@ static void do_enqueue_task(struct rq *rq, struct task_struct *p, u64 enq_flags,
>  	 * is offline and are just running the hotplug path. Don't bother the
>  	 * BPF scheduler.
>  	 */
> -	if (!scx_rq_online(rq))
> +	if (unlikely(!scx_rq_online(rq)))
>  		goto local;
>  
> -	if (scx_rq_bypassing(rq)) {
> +	if (unlikely(scx_rq_bypassing(rq))) {
>  		__scx_add_event(sch, SCX_EV_BYPASS_DISPATCH, 1);
>  		goto bypass;

both scx_rq_online() and scx_rq_bypassing() have the same likely/unlikely()
annotations built into them.

Thanks.

-- 
tejun