[PATCH] hot-add-mem x86_64: memory_add_physaddr_to_nid node fixup

In cases where the acpi memory-add event does not containe the pxm (node)
infomation allow the driver to look up node info based on the address.  The
acpi_get_node call returns -1 if it can't decode the pxm info, this causes
add_memory to panic.  acpi_get_node would have to decode the resource from the
handle (a lenghty proposition).  This seems to be the cleanist point to
interject the hook.

[kamezawa.hiroyu@jp.fujitsu.com: build fixes]
[y-goto@jp.fujitsu.com: build fixes]
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: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
index 64e4c21..7807fc5 100644 (file)
--- a/arch/ia64/mm/numa.c
+++ b/arch/ia64/mm/numa.c
@@ -16,6 +16,7 @@
 #include <linux/node.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
+#include <linux/module.h>
 #include <asm/mmzone.h>
 #include <asm/numa.h>
 
@@ -69,4 +70,21 @@ int early_pfn_to_nid(unsigned long pfn)
 
        return 0;
 }
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+/*
+ *  SRAT information is stored in node_memblk[], then we can use SRAT
+ *  information at memory-hot-add if necessary.
+ */
+
+int memory_add_physaddr_to_nid(u64 addr)
+{
+       int nid = paddr_to_nid(addr);
+       if (nid < 0)
+               return 0;
+       return nid;
+}
+
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
+#endif
 #endif

diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index e759109..71ecbb3 100644 (file)
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -498,6 +498,7 @@ int memory_add_physaddr_to_nid(u64 start)
 {
        return 0;
 }
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
 #endif
 
 #else /* CONFIG_MEMORY_HOTPLUG */

diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
index 8491300..3cc0544 100644 (file)
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -477,3 +477,5 @@ int memory_add_physaddr_to_nid(u64 start)
 
        return ret;
 }
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
+

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 1dda370..98099de 100644 (file)
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -238,6 +238,10 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
                        num_enabled++;
                        continue;
                }
+
+               if (node < 0)
+                       node = memory_add_physaddr_to_nid(info->start_addr);
+
                result = add_memory(node, info->start_addr, info->length);
                if (result)
                        continue;