linux-kernel - [RFC 5/8] compaction: remove active list counting

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Message-Id: <2b79bbf9ddceb73624f49bbe9477126147d875fd.1303833417.git.minchan.kim@gmail.com>
Date:	Wed, 27 Apr 2011 01:25:22 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux.com>,
	Johannes Weiner <jweiner@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.com>
Subject: [RFC 5/8] compaction: remove active list counting

acct_isolated of compaction uses page_lru_base_type which returns only
base type of LRU list so it never returns LRU_ACTIVE_ANON or LRU_ACTIVE_FILE.
So it's pointless to add lru[LRU_ACTIVE_[ANON|FILE]] to get sum.

Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Rik van Riel <riel@...hat.com>
Cc: Andrea Arcangeli <aarcange@...hat.com>
Signed-off-by: Minchan Kim <minchan.kim@...il.com>
---
 mm/compaction.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 9f80b5a..653b02b 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -219,8 +219,8 @@ static void acct_isolated(struct zone *zone, struct compact_control *cc)
 		count[lru]++;
 	}
 
-	cc->nr_anon = count[LRU_ACTIVE_ANON] + count[LRU_INACTIVE_ANON];
-	cc->nr_file = count[LRU_ACTIVE_FILE] + count[LRU_INACTIVE_FILE];
+	cc->nr_anon = count[LRU_INACTIVE_ANON];
+	cc->nr_file = count[LRU_INACTIVE_FILE];
 	__mod_zone_page_state(zone, NR_ISOLATED_ANON, cc->nr_anon);
 	__mod_zone_page_state(zone, NR_ISOLATED_FILE, cc->nr_file);
 }
-- 
1.7.1

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