Re: [PATCH] loop: inherit the ioprio in loop woker thread

[Bart Van Assche <bvanassche@xxxxxxx>]

On 5/22/24 00:48, Yunlong Xing wrote:
> @@ -1913,6 +1921,10 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
>   		set_active_memcg(old_memcg);
>   		css_put(cmd_memcg_css);
>   	}
> +
> +	if (ori_ioprio != cmd_ioprio)
> +		set_task_ioprio(current, ori_ioprio);
> +
>    failed:
>   	/* complete non-aio request */
>   	if (!use_aio || ret) {

Does adding this call in the hot path have a measurable performance impact?

Thanks,

Bart.