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Date:	Tue, 10 Nov 2009 15:37:04 -0700
From:	Alex Chiang <>
Cc:	Randy Dunlap <>,,, Greg KH <>
Subject: [PATCH v3 5/5] Documentation: ABI: /sys/devices/system/cpu/cpu#/node

Describe NUMA node symlink created for CPUs when CONFIG_NUMA is set.

Cc: Greg KH <>
Cc: Randy Dunlap <>
Signed-off-by: Alex Chiang <>

 Documentation/ABI/testing/sysfs-devices-system-cpu |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 5aace16..1671634 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -94,6 +94,20 @@ Description:	Discover and change the online state of a CPU.
 		For more information, please read Documentation/cpu-hotplug.txt
+What:		/sys/devices/system/cpu/cpu#/node
+Date:		October 2009
+Contact:	Linux memory management mailing list <>
+Description:	Discover NUMA node a CPU belongs to
+		When CONFIG_NUMA is enabled, a symbolic link that points
+		to the corresponding NUMA node directory.
+		For example, the following symlink is created for cpu42
+		in NUMA node 2:
+		/sys/devices/system/cpu/cpu42/node2 -> ../../node/node2
 What:		/sys/devices/system/cpu/cpu#/topology/core_id

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