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Subject[RFC/PATCH: 003/010] Memory hotplug for new nodes with pgdat allocation. (pgdat alloc caller for ia64)
This is caller of pgdat allocation for ia64.
If new memory belongs to new nodes, pgdat is allocated...

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

Index: pgdat2/arch/ia64/mm/init.c
===================================================================
--- pgdat2.orig/arch/ia64/mm/init.c 2006-02-10 17:03:43.000000000 +0900
+++ pgdat2/arch/ia64/mm/init.c 2006-02-10 17:29:30.000000000 +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>
@@ -652,16 +653,32 @@ 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, new_pgdat = 0;

- pgdat = NODE_DATA(0);
+ node = acpi_paddr_to_node(start, size);
+
+ if (node < 0)
+ node = 0; /* pxm is undefined in DSDT.
+ This might be non NUMA case */
+
+ if (!node_online(node)){
+ ret = new_pgdat_init(node, start_pfn, nr_pages);
+ if (ret)
+ return ret;
+
+ new_pgdat = 1;
+ }
+ pgdat = NODE_DATA(node);

zone = pgdat->node_zones + ZONE_NORMAL;
ret = __add_pages(zone, start_pfn, nr_pages);

- if (ret)
+ if (ret){
printk("%s: Problem encountered in __add_pages() as ret=%d\n",
__FUNCTION__, ret);
+ if (new_pgdat)
+ release_pgdat(pgdat);
+ }

return ret;
}
--
Yasunori Goto


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