The following commit has been merged in the linux branch: commit d93fc863d2d2cea1057996c39cef368f41741448 Author: Alex Chiang achiang@hp.com Date: Wed Oct 21 21:45:25 2009 -0600

Documentation: ABI: /sys/devices/system/cpu/ topology files

Add brief descriptions for the following sysfs files:

/sys/devices/system/cpu/kernel_max /sys/devices/system/cpu/offline /sys/devices/system/cpu/online /sys/devices/system/cpu/possible /sys/devices/system/cpu/present

Excerpted the relevant information from Documentation/cputopology.txt and pointed back to cputopology.txt as the authoritative source of information.

Cc: Mike Travis travis@sgi.com Cc: Rusty Russell rusty@rustcorp.com.au Signed-off-by: Alex Chiang achiang@hp.com Signed-off-by: Greg Kroah-Hartman gregkh@suse.de

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 86126b1..871acdb 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -10,6 +10,34 @@ Description: /sys/devices/system/cpu/cpu#/

+What: /sys/devices/system/cpu/kernel_max + /sys/devices/system/cpu/offline + /sys/devices/system/cpu/online + /sys/devices/system/cpu/possible + /sys/devices/system/cpu/present +Date: December 2008 +Contact: Linux kernel mailing list linux-kernel@vger.kernel.org +Description: CPU topology files that describe kernel limits related to + hotplug. Briefly: + + kernel_max: the maximum cpu index allowed by the kernel + configuration. + + offline: cpus that are not online because they have been + HOTPLUGGED off or exceed the limit of cpus allowed by the + kernel configuration (kernel_max above). + + online: cpus that are online and being scheduled. + + possible: cpus that have been allocated resources and can be + brought online if they are present. + + present: cpus that have been identified as being present in + the system. + + See Documentation/cputopology.txt for more information. + + What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X Date: August 2008 KernelVersion: 2.6.27