Re: [PATCH 1/5] sched: Add TIF_NEED_RESCHED_LAZY infrastructure

[Sebastian Andrzej Siewior]

On 2024-10-07 09:46:10 [+0200], Peter Zijlstra wrote:
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -964,9 +963,9 @@ static bool set_nr_if_polling(struct tas
>  }
>  
>  #else
> -static inline bool set_nr_and_not_polling(struct task_struct *p)
> +static inline bool set_nr_and_not_polling(struct thread_info *ti, int tif)
>  {
> -	set_tsk_need_resched(p);
> +	atomic_long_or(1 << tif, (atomic_long_t *)&ti->flags);

	set_ti_thread_flag(ti, tif);
?
Not sure if there is a benefit over atomic_long_or() but you could avoid
the left shift. I know. Performance critical.

>  	return true;
>  }
>  

Sebastian