Hi Chen,

2012/09/28 12:21, Ni zhan Chen wrote:

On 09/05/2012 05:25 PM, wency@cn.fujitsu.com wrote:

quoted

From: Wen Congyang <redacted>

The memory device has only one node id. Store the node id when
enable the memory device, and we can reuse it when removing the
memory device.

one question:
if use numa emulation, memory device will associated to one node or ...?

Memory device has only one node, even if you use numa emulation.

Thanks,
Yasuaki Ishimatsu

quoted

CC: David Rientjes <rientjes@google.com>
CC: Jiang Liu <redacted>
CC: Len Brown <redacted>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <redacted>
CC: Christoph Lameter <redacted>
Cc: Minchan Kim <redacted>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: KOSAKI Motohiro <redacted>
CC: Yasuaki Ishimatsu <redacted>
Signed-off-by: Wen Congyang <redacted>
Reviewed-by: Yasuaki Ishimatsu <redacted>
---
  drivers/acpi/acpi_memhotplug.c |    4 ++++
  1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 2a7beac..7873832 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c

@@ -83,6 +83,7 @@ struct acpi_memory_info {
  struct acpi_memory_device {
      struct acpi_device * device;
      unsigned int state;    /* State of the memory device */
+    int nid;
      struct list_head res_list;
  };

@@ -256,6 +257,9 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
          info->enabled = 1;
          num_enabled++;
      }
+
+    mem_device->nid = node;
+
      if (!num_enabled) {
          printk(KERN_ERR PREFIX "add_memory failed\n");
          mem_device->state = MEMORY_INVALID_STATE;