# Re: \[RFC v2 09/18\] mm/huge\_page: Convert khugepaged() into kthread worker API

- From: Tejun Heo \<tj@kernel.org\>
- Date: 2015-09-22 20:26:13 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2015/09/4581741
- Thread: https://ratatoskr.run/linux-mm/2015/09/4580093/t.md

```text
Hello,

On Mon, Sep 21, 2015 at 03:03:50PM +0200, Petr Mladek wrote:
> +static int khugepaged_has_work(void)
> +{
> +	return !list_empty(&khugepaged_scan.mm_head) &&
> +		khugepaged_enabled();
> +}

Hmmm... no biggie but this is a bit bothering.

> @@ -425,7 +447,10 @@ static ssize_t scan_sleep_millisecs_store(struct kobject *kobj,
>  		return -EINVAL;
>  
>  	khugepaged_scan_sleep_millisecs = msecs;
> -	wake_up_interruptible(&khugepaged_wait);
> +	if (khugepaged_has_work())
> +		mod_delayed_kthread_work(khugepaged_worker,
> +					 &khugepaged_do_scan_work,
> +					 0);

What's wrong with just doing the following?

	if (khugepaged_enabled())
		mod_delayed_kthread_work(...);

Thanks.

-- 
tejun

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