linux-kernel - Re: [PATCH 09/14] Add /proc trigger for memory compaction

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Date:	Wed, 7 Apr 2010 19:27:07 +0100
From:	Mel Gorman <mel@....ul.ie>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Adam Litke <agl@...ibm.com>, Avi Kivity <avi@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Minchan Kim <minchan.kim@...il.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 09/14] Add /proc trigger for memory compaction

> mm,compaction: Tighten up the allowed values for compact_memory and initialisation
> 

Minor mistake in the initialisation part of the patch

==== CUT HERE ====
mm,compaction: Initialise cc->zone at the correct time

Init cc->zone after we know what zone we are looking for. This is a fix
to the fix patch "mm,compaction: Tighten up the allowed values for
compact_memory and initialisation"

Signed-off-by: Mel Gorman <mel@....ul.ie>
---
 mm/compaction.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index d9c5733..effe57d 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -396,13 +396,13 @@ static int compact_node(int nid)
 		struct compact_control cc = {
 			.nr_freepages = 0,
 			.nr_migratepages = 0,
-			.zone = zone,
 		};
 
 		zone = &pgdat->node_zones[zoneid];
 		if (!populated_zone(zone))
 			continue;
 
+		cc.zone = zone,
 		INIT_LIST_HEAD(&cc.freepages);
 		INIT_LIST_HEAD(&cc.migratepages);
 
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