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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.