> @@ -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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