Component Type: kbuild config

Description: enable/disable function tracing dynamically

More info: This option will modify all the calls to function tracing dynamically (will patch them out of the binary image and replace them with a No-Op instruction) on boot up. During compile time, a table is made of all the locations that ftrace can function trace, and this table is linked into the kernel image. When this is enabled, functions can be individually enabled, and the functions not enabled will not affect performance of the system. See the files in /sys/kernel/debug/tracing: available_filter_functions set_ftrace_filter set_ftrace_notrace This way a CONFIG_FUNCTION_TRACER kernel is slightly larger, but otherwise has native performance as long as no tracing is active.

Build project: Kconfig (Linux kconfig) (Path: kernel\trace\Kconfig )

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