Re: [PATCH] ratelimit: restrict the delay time to a non-negative value

[Alberto Garcia]

On Tue 20 Sep 2022 08:33:50 PM +08, wangliangzz@126.com wrote:
> From: Wang Liang <wangliangzz@inspur.com>
>
> The delay time should never be a negative value.
>
> -    return limit->slice_end_time - now;
> +    return MAX(limit->slice_end_time - now, 0);

How can this be negative? slice_end_time is guaranteed to be larger than
now:

    if (limit->slice_end_time < now) {
        /* Previous, possibly extended, time slice finished; reset the
         * accounting. */
        limit->slice_start_time = now;
        limit->slice_end_time = now + limit->slice_ns;
        limit->dispatched = 0;
    }

Berto