From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yasunori Goto <y-goto@jp.fujitsu.com>
Date: Mon, 06 Feb 2006 13:37:25 +0000
Subject: [RFC:PATCH(002/003)] Memory add to onlined node.(For ia64)
Message-Id: <20060206222320.0609.Y-GOTO@jp.fujitsu.com>
List-Id: <linux-ia64.vger.kernel.org>
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To: Andi Kleen <ak@suse.de>, "Luck, Tony" <tony.luck@intel.com>, "Tolentino, Matthew E" <matthew.e.tolentino@intel.com>, "Brown, Len" <len.brown@intel.com>, naveen.b.s@intel.com
Cc: Linux Kernel ML <linux-kernel@vger.kernel.org>, ACPI-ML <linux-acpi@vger.kernel.org>, linux-ia64@vger.kernel.org, x86-64 Discuss <discuss@x86-64.org>

This is for ia64 to add memory which belongs onlined node.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>

Index: node_add2/arch/ia64/mm/init.c
=================================--- node_add2.orig/arch/ia64/mm/init.c	2006-02-03 20:51:48.000000000 +0900
+++ node_add2/arch/ia64/mm/init.c	2006-02-03 21:39:21.000000000 +0900
@@ -20,6 +20,7 @@
 #include <linux/swap.h>
 #include <linux/proc_fs.h>
 #include <linux/bitops.h>
+#include <linux/acpi.h>
 
 #include <asm/a.out.h>
 #include <asm/dma.h>
@@ -652,9 +653,15 @@ int add_memory(u64 start, u64 size)
 	struct zone *zone;
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
-	int ret;
+	int ret, node;
 
-	pgdat = NODE_DATA(0);
+	node = acpi_paddr_to_node(start, size);
+
+	if (node >= 0 && node_online(node))
+		pgdat = NODE_DATA(node);
+	else
+		/* New node's memory will be added to Node 0 temporally. */
+		pgdat = NODE_DATA(0);
 
 	zone = pgdat->node_zones + ZONE_NORMAL;
 	ret = __add_pages(zone, start_pfn, nr_pages);

-- 
Yasunori Goto