linux-kernel - [Part3 PATCH v2 3/4] mem-hotplug: Skip LOCAL_NODE

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Message-Id: <1371128636-9027-4-git-send-email-tangchen@cn.fujitsu.com>
Date:	Thu, 13 Jun 2013 21:03:55 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	mgorman@...e.de, minchan@...nel.org, mina86@...a86.com,
	gong.chen@...ux.intel.com, vasilis.liaskovitis@...fitbricks.com,
	lwoodman@...hat.com, riel@...hat.com, jweiner@...hat.com,
	prarit@...hat.com
Cc:	x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [Part3 PATCH v2 3/4] mem-hotplug: Skip LOCAL_NODE_DATA pages in memory online procedure.

Pages marked as LOCAL_NODE_DATA are skipped when we do memory offline.
So we have to skip them again when we do memory online.

Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
---
 mm/memory_hotplug.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index c2017eb..3561048 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -843,6 +843,11 @@ static int online_pages_range(unsigned long start_pfn, unsigned long nr_pages,
 	if (PageReserved(pfn_to_page(start_pfn)))
 		for (i = 0; i < nr_pages; i++) {
 			page = pfn_to_page(start_pfn + i);
+
+			/* Skip pages storing local node kernel data. */
+			if (is_local_node_data(page))
+				continue;
+
 			(*online_page_callback)(page);
 			onlined_pages++;
 		}
-- 
1.7.1

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