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authorKeith Mannthey <kmannth@us.ibm.com>2006-09-30 23:27:09 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 00:39:18 -0700
commit45e0b78b0532f92c01e363dd4287617c5be4574f (patch)
tree8c09edff4667535252b5c95efd68d397ae1283a5
parent53947027ad90542ddb2bb746e3175827c270610a (diff)
[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>
-rw-r--r--arch/x86_64/mm/init.c17
-rw-r--r--mm/memory_hotplug.c60
2 files changed, 43 insertions, 34 deletions
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 71ecbb3f326..19c72520a86 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -474,12 +474,12 @@ int arch_add_memory(int nid, u64 start, u64 size)
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
+ init_memory_mapping(start, (start + size -1));
+
ret = __add_pages(zone, start_pfn, nr_pages);
if (ret)
goto error;
- init_memory_mapping(start, (start + size -1));
-
return ret;
error:
printk("%s: Problem encountered in __add_pages!\n", __func__);
@@ -501,7 +501,16 @@ int memory_add_physaddr_to_nid(u64 start)
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
-#else /* CONFIG_MEMORY_HOTPLUG */
+#ifndef CONFIG_ACPI_NUMA
+int memory_add_physaddr_to_nid(u64 start)
+{
+ return 0;
+}
+#endif
+
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
+#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE
/*
* Memory Hotadd without sparsemem. The mem_maps have been allocated in advance,
* just online the pages.
@@ -527,7 +536,7 @@ int __add_pages(struct zone *z, unsigned long start_pfn, unsigned long nr_pages)
}
return err;
}
-#endif /* CONFIG_MEMORY_HOTPLUG */
+#endif
static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, kcore_modules,
kcore_vsyscall;
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 7666dbd328d..fd678a662ea 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 @@ static void rollback_node_hotadd(int nid, pg_data_t *pgdat)
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)
{