Hi.

On Fri, Jul 17, 2026 at 02:02:24PM +0800, Tao Cui <cui.tao@linux.dev> wrote:
> -		The sampling window size in milliseconds.  This is the minimum
> -		duration of time between evaluation events.  Windows only elapse
> -		with IO activity.  Idle periods extend the most recent window.
> +		(Rotational devices only.)  The sampling window size in
> +		milliseconds.  This is the minimum duration of time between
> +		evaluation events.  Windows only elapse with IO activity.  Idle
> +		periods extend the most recent window.
> +
> +	  missed
> +		(Non-rotational devices only.)  The number of IOs in the
> +		current window whose latency exceeded the target.

		A group is considered to be missing its target once
		missed reaches certain ratio of total.

I would not bind to the exact value in the docs and put the explanation
to the "missed" stanza.

Thanks for documenting missed (pun intended) fields.

Besides that
Acked-by: Michal Koutný <mkoutny@suse.com>