From: Keith Mannthey <[email protected]>
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<[email protected]>
---
init.c | 20 +++++++-------------
srat.c | 13 ++++++++++++-
2 files changed, 19 insertions(+), 14 deletions(-)
diff -urN linux-2.6.17/arch/x86_64/mm/init.c current/arch/x86_64/mm/init.c
--- linux-2.6.17/arch/x86_64/mm/init.c 2006-08-04 01:30:39.000000000 -0400
+++ current/arch/x86_64/mm/init.c 2006-08-04 01:24:04.000000000 -0400
@@ -517,19 +517,6 @@
#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.
*/
@@ -560,6 +547,13 @@
}
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 -urN linux-2.6.17/arch/x86_64/mm/srat.c current/arch/x86_64/mm/srat.c
--- linux-2.6.17/arch/x86_64/mm/srat.c 2006-08-04 01:31:44.000000000 -0400
+++ current/arch/x86_64/mm/srat.c 2006-08-04 01:24:04.000000000 -0400
@@ -25,7 +25,7 @@
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;
@@ -457,3 +457,14 @@
}
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;
+}
-
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