Re: [PATCH V3 1/4] Sched: Scheduler time slice extension
From: Sebastian Andrzej Siewior
Date: Fri May 02 2025 - 08:34:42 EST
On 2025-05-02 01:59:52 [+0000], Prakash Sangappa wrote:
> diff --git a/kernel/entry/common.c b/kernel/entry/common.c
> index 20154572ede9..b26adccb32df 100644
> --- a/kernel/entry/common.c
> +++ b/kernel/entry/common.c
> @@ -98,8 +99,12 @@ __always_inline unsigned long exit_to_user_mode_loop(struct pt_regs *regs,
>
> local_irq_enable_exit_to_user(ti_work);
>
> - if (ti_work & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY))
> - schedule();
> + if (ti_work & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY)) {
I asked to limit this to LAZY only.
> + if (irq && rseq_delay_resched())
> + clear_tsk_need_resched(current);
> + else
> + schedule();
> + }
>
> if (ti_work & _TIF_UPROBE)
> uprobe_notify_resume(regs);
Sebastian