[RFC/PATCH: 007/010] Memory hotplug for new nodes with pgdat allocation. (pgdat link insert)

[RFC/PATCH: 007/010] Memory hotplug for new nodes with pgdat allocation. (pgdat link insert)

[Yasunori Goto]

This is to insert pgdat to its link.
To be honest, I would like remove this pgdat link, and
I posted patches to remove it for a long time ago to -mm.

http://marc.theaimsgroup.com/?l=linux-mm&m\x112808582217281&w=2
http://marc.theaimsgroup.com/?l=linux-mm&m\x112808582227966&w=2

But, it might have influence against performance for big NUMA box.
So, I should check it.
However, I'm very hard to access big NUMA box. Our machine is 
divided as small partitioned for test of each team inside of fujitsu
every time. Sigh. :-(. 

This is small lazy patch instead of them.

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

Index: pgdat2/arch/ia64/mm/discontig.c
=================================--- pgdat2.orig/arch/ia64/mm/discontig.c	2006-02-10 17:40:05.000000000 +0900
+++ pgdat2/arch/ia64/mm/discontig.c	2006-02-10 19:42:27.000000000 +0900
@@ -384,7 +384,7 @@ static void __init *memory_less_node_all
  * pgdat_insert - insert the pgdat into global pgdat_list
  * @pgdat: the pgdat for a node.
  */
-static void __init pgdat_insert(pg_data_t *pgdat)
+void __meminit pgdat_insert(pg_data_t *pgdat)
 {
 	pg_data_t *prev = NULL, *next;
 
Index: pgdat2/arch/ia64/mm/init.c
=================================--- pgdat2.orig/arch/ia64/mm/init.c	2006-02-10 17:29:30.000000000 +0900
+++ pgdat2/arch/ia64/mm/init.c	2006-02-10 19:42:41.000000000 +0900
@@ -647,6 +647,8 @@ void online_page(struct page *page)
 	num_physpages++;
 }
 
+extern void __meminit pgdat_insert(pg_data_t *pgdat);
+
 int add_memory(u64 start, u64 size)
 {
 	pg_data_t *pgdat;
@@ -663,6 +665,7 @@ int add_memory(u64 start, u64 size)
 
 	if (!node_online(node)){
 		ret = new_pgdat_init(node, start_pfn, nr_pages);
+		pgdat_insert(NODE_DATA(node));
 		if (ret)
 			return ret;
 

-- 
Yasunori Goto