linux-kernel - [PATCH 8/21] make-zone-nr_pages-helper-function.patch

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Date:	Wed, 3 Dec 2008 13:55:55 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH  8/21] make-zone-nr_pages-helper-function.patch

make zone_nr_pages() helper function.

it is used by latter patch.
this patch doesn't have any functional change.

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Acked-by: Rik van Riel <riel@...hat.com>
 mm/vmscan.c |   15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

Index: mmotm-2.6.28-Dec02/mm/vmscan.c
===================================================================
--- mmotm-2.6.28-Dec02.orig/mm/vmscan.c
+++ mmotm-2.6.28-Dec02/mm/vmscan.c
@@ -137,6 +137,13 @@ static struct zone_reclaim_stat *get_rec
 	return &zone->reclaim_stat;
 }
 
+static unsigned long zone_nr_pages(struct zone *zone, struct scan_control *sc,
+				   enum lru_list lru)
+{
+	return zone_page_state(zone, NR_LRU_BASE + lru);
+}
+
+
 /*
  * Add a shrinker callback to be called from the vm
  */
@@ -1419,10 +1426,10 @@ static void get_scan_ratio(struct zone *
 		return;
 	}
 
-	anon  = zone_page_state(zone, NR_ACTIVE_ANON) +
-		zone_page_state(zone, NR_INACTIVE_ANON);
-	file  = zone_page_state(zone, NR_ACTIVE_FILE) +
-		zone_page_state(zone, NR_INACTIVE_FILE);
+	anon  = zone_nr_pages(zone, sc, LRU_ACTIVE_ANON) +
+		zone_nr_pages(zone, sc, LRU_INACTIVE_ANON);
+	file  = zone_nr_pages(zone, sc, LRU_ACTIVE_FILE) +
+		zone_nr_pages(zone, sc, LRU_INACTIVE_FILE);
 	free  = zone_page_state(zone, NR_FREE_PAGES);
 
 	/* If we have very few page cache pages, force-scan anon pages. */

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