What:		/sys/kernel/profiling
  Date:		September 2008
  Contact:	Dave Hansen <dave@linux.vnet.ibm.com>
  Description:
  		/sys/kernel/profiling is the runtime equivalent
  		of the boot-time profile= option.
  
  		You can get the same effect running:
  
  			echo 2 > /sys/kernel/profiling
  
  		as you would by issuing profile=2 on the boot
  		command line.