linux-kernel - [PATCH] fix count_vm_event preempt in memory compaction direct reclaim

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Date:	Wed, 5 May 2010 14:19:08 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	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: [PATCH] fix count_vm_event preempt in memory compaction direct
 reclaim

On Tue, Apr 20, 2010 at 10:01:14PM +0100, Mel Gorman wrote:
> +		if (page) {
> +			__count_vm_event(COMPACTSUCCESS);
> +			return page;

==
From: Andrea Arcangeli <aarcange@...hat.com>

Preempt is enabled so it must use count_vm_event.

Signed-off-by: Andrea Arcangeli <aarcange@...hat.com>
---

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1768,7 +1768,7 @@ __alloc_pages_direct_compact(gfp_t gfp_m
 				alloc_flags, preferred_zone,
 				migratetype);
 		if (page) {
-			__count_vm_event(COMPACTSUCCESS);
+			count_vm_event(COMPACTSUCCESS);
 			return page;
 		}
 
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