On Wed, 20 Dec 2023 07:17:53 +0800 Kevin Hao <haokexin@xxxxxxxxx> wrote:
> A freezable kernel thread can enter frozen state during freezing by
> either calling try_to_freeze() or using wait_event_freezable() and its
> variants. However, there is no need to use both methods simultaneously.
> The freezable wait variants have been used in khugepaged_wait_work()
> and khugepaged_alloc_sleep(), so remove this redundant
> try_to_freeze().
>
> ...
>
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -2500,7 +2500,7 @@ static void khugepaged_do_scan(struct collapse_control *cc)
> while (true) {
> cond_resched();
>
> - if (unlikely(kthread_should_stop() || try_to_freeze()))
> + if (unlikely(kthread_should_stop()))
> break;
>
> spin_lock(&khugepaged_mm_lock);
What are the effects upon worst-case freezing latency?
