Re: [PATCH] vmscan: Stop kswapd waiting on congestion when the min watermark is not being met

[KOSAKI Motohiro]

> @@ -2092,8 +2102,12 @@ loop_again:
>                 * OK, kswapd is getting into trouble.  Take a nap, then take
>                 * another pass across the zones.
>                 */
> -               if (total_scanned && priority < DEF_PRIORITY - 2)
> -                       congestion_wait(BLK_RW_ASYNC, HZ/10);
> +               if (total_scanned && (priority < DEF_PRIORITY - 2)) {
> +                       if (!has_under_min_watermark_zone)

if I am correct, we must to remove "!".


> +                               count_vm_event(KSWAPD_NO_CONGESTION_WAIT);
> +                       else
> +                               congestion_wait(BLK_RW_ASYNC, HZ/10);
> +               }
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