linux-kernel - [PATCH 6/8] mm: lru_deactivate_fn should clear PG

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Date:	Fri, 30 Oct 2015 16:01:42 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Michael Kerrisk <mtk.manpages@...il.com>,
	linux-api@...r.kernel.org, Hugh Dickins <hughd@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	zhangyanfei@...fujitsu.com, Rik van Riel <riel@...hat.com>,
	Mel Gorman <mgorman@...e.de>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Jason Evans <je@...com>, Daniel Micay <danielmicay@...il.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Michal Hocko <mhocko@...e.cz>, yalin.wang2010@...il.com,
	Shaohua Li <shli@...nel.org>, Minchan Kim <minchan@...nel.org>
Subject: [PATCH 6/8] mm: lru_deactivate_fn should clear PG_referenced

deactivate_page aims for accelerate for reclaiming through
moving pages from active list to inactive list so we should
clear PG_referenced for the goal.

Acked-by: Hugh Dickins <hughd@...gle.com>
Suggested-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Minchan Kim <minchan@...nel.org>
---
 mm/swap.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/swap.c b/mm/swap.c
index d0eacc5f62a3..4a6aec976ab1 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -810,6 +810,7 @@ static void lru_deactivate_fn(struct page *page, struct lruvec *lruvec,
 
 		del_page_from_lru_list(page, lruvec, lru + LRU_ACTIVE);
 		ClearPageActive(page);
+		ClearPageReferenced(page);
 		add_page_to_lru_list(page, lruvec, lru);
 
 		__count_vm_event(PGDEACTIVATE);
-- 
1.9.1

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