linux-kernel - [RFC V3 PATCH 21/25] x86: get pg_data

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Date:	Mon, 6 Aug 2012 17:23:15 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Mel Gorman <mel@....ul.ie>, linux-kernel@...r.kernel.org
Cc:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [RFC V3 PATCH 21/25] 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>
---
 arch/x86/mm/numa.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 2d125be..a86e315 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -223,9 +223,13 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
 		remapped = true;
 	} 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",
+		if (!nd_pa)
+			printk(KERN_WARNING "Cannot find %zu bytes in node %d\n",
 			       nd_size, nid);
+		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);
-- 
1.7.4.4

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