linux-kernel - [PATCH 1/5] x86: Get pg_data

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Date:	Mon, 19 Nov 2012 22:27:22 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	tangchen@...fujitsu.com, wency@...fujitsu.com,
	linfeng@...fujitsu.com, rob@...dley.net, akpm@...ux-foundation.org,
	isimatu.yasuaki@...fujitsu.com, laijs@...fujitsu.com,
	jiang.liu@...wei.com, kosaki.motohiro@...fujitsu.com,
	minchan.kim@...il.com, mgorman@...e.de, rientjes@...gle.com,
	yinghai@...nel.org, rusty@...tcorp.com.au
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-doc@...r.kernel.org
Subject: [PATCH 1/5] x86: Get pg_data_t's memory from other node

From: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>

If system can create movable node which all memory of the
node is allocated as ZONE_MOVABLE, setup_node_data() cannot
allocate memory for the node's pg_data_t.
So when memblock_alloc_nid() fails, setup_node_data() retries
memblock_alloc().

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
Reviewed-by: Wen Congyang <wency@...fujitsu.com>
Tested-by: Lin Feng <linfeng@...fujitsu.com>
---
 arch/x86/mm/numa.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 2d125be..ae2e76e 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -224,9 +224,14 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
 	} else {
 		nd_pa = memblock_alloc_nid(nd_size, SMP_CACHE_BYTES, nid);
 		if (!nd_pa) {
-			pr_err("Cannot find %zu bytes in node %d\n",
+			printk(KERN_WARNING "Cannot find %zu bytes in node %d\n",
 			       nd_size, nid);
-			return;
+			nd_pa = memblock_alloc(nd_size, SMP_CACHE_BYTES);
+			if (!nd_pa) {
+				pr_err("Cannot find %zu bytes in other node\n",
+				       nd_size);
+				return;
+			}
 		}
 		nd = __va(nd_pa);
 	}
-- 
1.7.1

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