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authorKeith Mannthey <kmannth@us.ibm.com>2006-09-30 23:27:06 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 00:39:18 -0700
commit4942e998b40b8f6080930ec16442444e9930aee5 (patch)
tree7b321e7e632dddb88539dd2e22c3b4ad06fae4f2
parent71efa8fdc55e70ec6687c897a30759f0a2c2ad7e (diff)
downloadlinux-4942e998b40b8f6080930ec16442444e9930aee5.tar.gz
[PATCH] hot-add-mem x86_64: memory_add_physaddr_to_nid enable
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.c20
-rw-r--r--arch/x86_64/mm/srat.c13
2 files changed, 19 insertions, 14 deletions
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 3e16fe08150ec6..e759109abb36d8 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -463,19 +463,6 @@ void online_page(struct page *page)
#ifdef CONFIG_MEMORY_HOTPLUG
/*
- * XXX: memory_add_physaddr_to_nid() is to find node id from physical address
- * via probe interface of sysfs. If acpi notifies hot-add event, then it
- * can tell node id by searching dsdt. But, probe interface doesn't have
- * node id. So, return 0 as node id at this time.
- */
-#ifdef CONFIG_NUMA
-int memory_add_physaddr_to_nid(u64 start)
-{
- return 0;
-}
-#endif
-
-/*
* Memory is added always to NORMAL zone. This means you will never get
* additional DMA/DMA32 memory.
*/
@@ -506,6 +493,13 @@ int remove_memory(u64 start, u64 size)
}
EXPORT_SYMBOL_GPL(remove_memory);
+#ifndef CONFIG_ACPI_NUMA
+int memory_add_physaddr_to_nid(u64 start)
+{
+ return 0;
+}
+#endif
+
#else /* CONFIG_MEMORY_HOTPLUG */
/*
* Memory Hotadd without sparsemem. The mem_maps have been allocated in advance,
diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
index 19396a261e8d0b..8491300ef909ac 100644
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -27,7 +27,7 @@ static struct acpi_table_slit *acpi_slit;
static nodemask_t nodes_parsed __initdata;
static struct bootnode nodes[MAX_NUMNODES] __initdata;
-static struct bootnode nodes_add[MAX_NUMNODES] __initdata;
+static struct bootnode nodes_add[MAX_NUMNODES];
static int found_add_area __initdata;
int hotadd_percent __initdata = 0;
@@ -466,3 +466,14 @@ int __node_distance(int a, int b)
}
EXPORT_SYMBOL(__node_distance);
+
+int memory_add_physaddr_to_nid(u64 start)
+{
+ int i, ret = 0;
+
+ for_each_node(i)
+ if (nodes_add[i].start <= start && nodes_add[i].end > start)
+ ret = i;
+
+ return ret;
+}