linux-kernel - [PATCH -mm] split_lru: fix pagevec_move_tail() doesn't treat unevictable page

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Message-Id: <20080701155749.37F8.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Tue, 01 Jul 2008 16:01:19 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Rik van Riel <riel@...hat.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [PATCH -mm] split_lru: fix pagevec_move_tail() doesn't treat unevictable page 

even under writebacking, page can move to unevictable list.
so shouldn't pagevec_move_tail() check unevictable?


Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

---
 mm/swap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: b/mm/swap.c
===================================================================
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -116,7 +116,7 @@ static void pagevec_move_tail(struct pag
 			zone = pagezone;
 			spin_lock(&zone->lru_lock);
 		}
-		if (PageLRU(page) && !PageActive(page)) {
+		if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
 			int lru = page_is_file_cache(page);
 			list_move_tail(&page->lru, &zone->lru[lru].list);
 			pgmoved++;


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