linux-kernel - [PATCH v2 5/5] Documentation: ABI: /sys/devices/system/cpu/cpu#/node

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Date:	Wed, 21 Oct 2009 22:15:30 -0600
From:	Alex Chiang <achiang@...com>
To:	akpm@...ux-foundation.org
Cc:	Randy Dunlap <randy.dunlap@...cle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Greg KH <greg@...ah.com>
Subject: [PATCH v2 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 <greg@...ah.com>
Cc: Randy Dunlap <randy.dunlap@...cle.com>
Signed-off-by: Alex Chiang <achiang@...com>
---

 Documentation/ABI/testing/sysfs-devices-system-cpu |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index b400c34..67813ae 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -79,6 +79,21 @@ 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 <linux-mm@...ck.org>
+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
 		/sys/devices/system/cpu/cpu#/topology/core_siblings
 		/sys/devices/system/cpu/cpu#/topology/core_siblings_list

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