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From:   Chao Xu <amos.xuchao@gmail.com>
To:     akpm@linux-foundation.org
Cc:     linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Chao Xu <Chao.Xu9@zeekrlife.com>
Subject: [PATCH] mm/vmscan: simplify the nr assignment logic for pages to scan
Date:   Wed,  9 Nov 2022 15:04:16 +0800
Message-Id: <20221109070416.620887-1-Chao.Xu9@zeekrlife.com>
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By default the assignment logic of anonymouns or file inactive
pages and active pages to scan using the same duplicated code
snippet. To simplify the logic, merge the same part.

Signed-off-by: Chao Xu <Chao.Xu9@zeekrlife.com>
---
 mm/vmscan.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 04d8b88e5216..df3c0cbe381f 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -5932,14 +5932,11 @@ static void shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)
 		 * scan target and the percentage scanning already complete
 		 */
 		lru = (lru == LRU_FILE) ? LRU_BASE : LRU_FILE;
-		nr_scanned = targets[lru] - nr[lru];
-		nr[lru] = targets[lru] * (100 - percentage) / 100;
-		nr[lru] -= min(nr[lru], nr_scanned);
-
-		lru += LRU_ACTIVE;
-		nr_scanned = targets[lru] - nr[lru];
-		nr[lru] = targets[lru] * (100 - percentage) / 100;
-		nr[lru] -= min(nr[lru], nr_scanned);
+		for ( ; lru <= lru + LRU_ACTIVE; lru++) {
+			nr_scanned = targets[lru] - nr[lru];
+			nr[lru] = targets[lru] * (100 - percentage) / 100;
+			nr[lru] -= min(nr[lru], nr_scanned);
+		}
 
 		scan_adjusted = true;
 	}
-- 
2.34.1