linux-kernel - [PATCH] memory-hotplug: add build zonelists when offline pages

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Message-ID: <5033843E.8000902@gmail.com>
Date:	Tue, 21 Aug 2012 20:51:10 +0800
From:	qiuxishi <qiuxishi@...il.com>
To:	akpm@...ux-foundation.org, liuj97@...il.com,
	paul.gortmaker@...driver.com
CC:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	bessel.wang@...wei.com, wujianguo@...wei.com, qiuxishi@...wei.com,
	jiang.liu@...wei.com, guohanjun@...wei.com, chenkeping@...wei.com,
	yinghai@...nel.org, wency@...fujitsu.com
Subject: [PATCH] memory-hotplug: add build zonelists when offline pages

From: Xishi Qiu <qiuxishi@...wei.com>

online_pages() does build_all_zonelists() and zone_pcp_update(),
I think offline_pages() should do it too. The node has no memory
to allocate, so remove this node's zones form other nodes' zonelists.


Signed-off-by: Xishi Qiu <qiuxishi@...wei.com>
---
 mm/memory_hotplug.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index bc7e7a2..5172bd4 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -979,7 +979,11 @@ repeat:
 	if (!node_present_pages(node)) {
 		node_clear_state(node, N_HIGH_MEMORY);
 		kswapd_stop(node);
-	}
+		mutex_lock(&zonelists_mutex);
+		build_all_zonelists(NODE_DATA(node), NULL);
+		mutex_unlock(&zonelists_mutex);
+	} else
+		zone_pcp_update(zone);

 	vm_total_pages = nr_free_pagecache_pages();
 	writeback_set_ratelimit();
-- 
1.7.6.1
--
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