linux_old1/Documentation/ABI/testing/sysfs-devices-system-xen_cpu

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What: /sys/devices/system/xen_cpu/
Date: May 2012
Contact: Liu, Jinsong <jinsong.liu@intel.com>
Description:
A collection of global/individual Xen physical cpu attributes
Individual physical cpu attributes are contained in
subdirectories named by the Xen's logical cpu number, e.g.:
/sys/devices/system/xen_cpu/xen_cpu#/
What: /sys/devices/system/xen_cpu/xen_cpu#/online
Date: May 2012
Contact: Liu, Jinsong <jinsong.liu@intel.com>
Description:
Interface to online/offline Xen physical cpus
When running under Xen platform, it provide user interface
to online/offline physical cpus, except cpu0 due to several
logic restrictions and assumptions.