Enable Xen debug and tuning parameters in debugfs

modulename: debugfs.ko

configname: CONFIG_XEN_DEBUG_FS

Linux Kernel Configuration
└─>Enable Xen debug and tuning parameters in debugfs
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
Enable statistics output and various tuning options in debugfs.
Enabling this option may incur a significant performance overhead.

source code:
arch/x86/xen/debugfs.c