[PATCH] hot-add-mem x86_64: use CONFIG_MEMORY_HOTPLUG_RESERVE
The api for hot-add memory already has a construct for finding nodes based on
an address, memory_add_physaddr_to_nid. This patch allows the fucntion to do
something besides return 0. It uses the nodes_add infomation to lookup to
node info for a hot add event.
Signed-off-by: Keith Mannthey <kmannth@us.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 7666dbd..fd678a6 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -26,6 +26,36 @@
#include <asm/tlbflush.h>
+/* add this memory to iomem resource */
+static struct resource *register_memory_resource(u64 start, u64 size)
+{
+ struct resource *res;
+ res = kzalloc(sizeof(struct resource), GFP_KERNEL);
+ BUG_ON(!res);
+
+ res->name = "System RAM";
+ res->start = start;
+ res->end = start + size - 1;
+ res->flags = IORESOURCE_MEM;
+ if (request_resource(&iomem_resource, res) < 0) {
+ printk("System RAM resource %llx - %llx cannot be added\n",
+ (unsigned long long)res->start, (unsigned long long)res->end);
+ kfree(res);
+ res = NULL;
+ }
+ return res;
+}
+
+static void release_memory_resource(struct resource *res)
+{
+ if (!res)
+ return;
+ release_resource(res);
+ kfree(res);
+ return;
+}
+
+
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
static int __add_zone(struct zone *zone, unsigned long phys_start_pfn)
{
@@ -223,36 +253,6 @@
return;
}
-/* add this memory to iomem resource */
-static struct resource *register_memory_resource(u64 start, u64 size)
-{
- struct resource *res;
- res = kzalloc(sizeof(struct resource), GFP_KERNEL);
- BUG_ON(!res);
-
- res->name = "System RAM";
- res->start = start;
- res->end = start + size - 1;
- res->flags = IORESOURCE_MEM;
- if (request_resource(&iomem_resource, res) < 0) {
- printk("System RAM resource %llx - %llx cannot be added\n",
- (unsigned long long)res->start, (unsigned long long)res->end);
- kfree(res);
- res = NULL;
- }
- return res;
-}
-
-static void release_memory_resource(struct resource *res)
-{
- if (!res)
- return;
- release_resource(res);
- kfree(res);
- return;
-}
-
-
int add_memory(int nid, u64 start, u64 size)
{