Re: [RFC v9 PATCH 03/21] memory-hotplug: store the node id in acpi_memory_device

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Hi Chen,

2012/09/28 12:21, Ni zhan Chen wrote:
On 09/05/2012 05:25 PM, wency@xxxxxxxxxxxxxx wrote:
From: Wen Congyang <wency@xxxxxxxxxxxxxx>

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



CC: David Rientjes <rientjes@xxxxxxxxxx>
CC: Jiang Liu <liuj97@xxxxxxxxx>
CC: Len Brown <len.brown@xxxxxxxxx>
CC: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
CC: Paul Mackerras <paulus@xxxxxxxxx>
CC: Christoph Lameter <cl@xxxxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
CC: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
CC: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
---
  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;



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