[RFC PATCH 2/4] mm: mglru: do try_to_inc_min_seq if scanned==0

[Barry Song (Xiaomi)]

If scanned == 0, we are likely running out of folios in the
reclaimable gens. Advance min_seq to keep it in sync with the
current reclaimable state.

Signed-off-by: Barry Song (Xiaomi) <baohua@xxxxxxxxxx>
---
 mm/vmscan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index f79402760776..4f3a375de86e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4858,6 +4858,7 @@ static int isolate_folios(unsigned long nr_to_scan, struct lruvec *lruvec,
 		 * Only fall back when reclaim is running at high priority.
 		 */
 		if (!scanned) {
+			try_to_inc_min_seq(lruvec, swappiness);
 			if (!sc->priority)
 				type = !type;
 		}
-- 
2.39.3 (Apple Git-146)