linux-kernel - [RFC PATCH] mm/vmscan: remove two un-needed mem_cgroup_page

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Date:	Sun, 16 Feb 2014 11:30:54 +0800
From:	Weijie Yang <weijie.yang@...sung.com>
To:	riel@...hat.com
Cc:	'Mel Gorman' <mgorman@...e.de>,
	'Andrew Morton' <akpm@...ux-foundation.org>,
	'Minchan Kim' <minchan@...nel.org>, weijie.yang.kh@...il.com,
	'linux-kernel' <linux-kernel@...r.kernel.org>,
	'Linux-MM' <linux-mm@...ck.org>
Subject: [RFC PATCH] mm/vmscan: remove two un-needed mem_cgroup_page_lruvec()
 call

In putback_inactive_pages() and move_active_pages_to_lru(),
lruvec is already an input parameter and pages are all from this lruvec,
therefore there is no need to call mem_cgroup_page_lruvec() in loop.

Signed-off-by: Weijie Yang <weijie.yang@...sung.com>
---
 mm/vmscan.c |    3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index a9c74b4..4804fdb 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1393,8 +1393,6 @@ putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list)
 			continue;
 		}
 
-		lruvec = mem_cgroup_page_lruvec(page, zone);
-
 		SetPageLRU(page);
 		lru = page_lru(page);
 		add_page_to_lru_list(page, lruvec, lru);
@@ -1602,7 +1600,6 @@ static void move_active_pages_to_lru(struct lruvec *lruvec,
 
 	while (!list_empty(list)) {
 		page = lru_to_page(list);
-		lruvec = mem_cgroup_page_lruvec(page, zone);
 
 		VM_BUG_ON_PAGE(PageLRU(page), page);
 		SetPageLRU(page);
-- 
1.7.10.4


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