linux-kernel - [PATCH v7 6/6] mm/vmscan: restore active/inactive ratio for anonymous LRU

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Date:   Thu, 23 Jul 2020 16:49:20 +0900
From:   js1304@...il.com
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Hugh Dickins <hughd@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Matthew Wilcox <willy@...radead.org>, kernel-team@....com,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH v7 6/6] mm/vmscan: restore active/inactive ratio for anonymous LRU

From: Joonsoo Kim <iamjoonsoo.kim@....com>

Now that workingset detection is implemented for anonymous LRU, we don't
need large inactive list to allow detecting frequently accessed pages
before they are reclaimed, anymore. This effectively reverts the temporary
measure put in by commit "mm/vmscan: make active/inactive ratio as 1:1 for
anon lru".

Acked-by: Johannes Weiner <hannes@...xchg.org>
Acked-by: Vlastimil Babka <vbabka@...e.cz>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
---
 mm/vmscan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 9d4e28c..b0de23d 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2207,7 +2207,7 @@ static bool inactive_is_low(struct lruvec *lruvec, enum lru_list inactive_lru)
 	active = lruvec_page_state(lruvec, NR_LRU_BASE + active_lru);
 
 	gb = (inactive + active) >> (30 - PAGE_SHIFT);
-	if (gb && is_file_lru(inactive_lru))
+	if (gb)
 		inactive_ratio = int_sqrt(10 * gb);
 	else
 		inactive_ratio = 1;
-- 
2.7.4