[linux-2.6-block.git] / kernel / gcov / Kconfig

menu "GCOV-based kernel profiling"

config GCOV_KERNEL
	bool "Enable gcov-based kernel profiling"
	depends on DEBUG_FS && CONSTRUCTORS
	default n
	---help---
	This option enables gcov-based code profiling (e.g. for code coverage
	measurements).

	If unsure, say N.

	Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
	for the entire kernel. To enable profiling for specific files or
	directories, add a line similar to the following to the respective
	Makefile:

	For a single file (e.g. main.o):
	        GCOV_PROFILE_main.o := y

	For all files in one directory:
	        GCOV_PROFILE := y

	To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
	is specified, use:

	        GCOV_PROFILE_main.o := n
	and:
	        GCOV_PROFILE := n

	Note that the debugfs filesystem has to be mounted to access
	profiling data.

config GCOV_PROFILE_ALL
	bool "Profile entire Kernel"
	depends on GCOV_KERNEL
	depends on S390 || X86 || (PPC && EXPERIMENTAL) || MICROBLAZE
	default n
	---help---
	This options activates profiling for the entire kernel.

	If unsure, say N.

	Note that a kernel compiled with profiling flags will be significantly
	larger and run slower. Also be sure to exclude files from profiling
	which are not linked to the kernel image to prevent linker errors.

endmenu
Commit	Line	Data
2521f2c2 PO	1	menu "GCOV-based kernel profiling"
	2
	3	config GCOV_KERNEL
	4	bool "Enable gcov-based kernel profiling"
	5	depends on DEBUG_FS && CONSTRUCTORS
	6	default n
	7	---help---
	8	This option enables gcov-based code profiling (e.g. for code coverage
	9	measurements).
	10
	11	If unsure, say N.
	12
	13	Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
	14	for the entire kernel. To enable profiling for specific files or
	15	directories, add a line similar to the following to the respective
	16	Makefile:
	17
	18	For a single file (e.g. main.o):
	19	GCOV_PROFILE_main.o := y
	20
	21	For all files in one directory:
	22	GCOV_PROFILE := y
	23
	24	To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
	25	is specified, use:
	26
	27	GCOV_PROFILE_main.o := n
	28	and:
	29	GCOV_PROFILE := n
	30
	31	Note that the debugfs filesystem has to be mounted to access
	32	profiling data.
	33
	34	config GCOV_PROFILE_ALL
	35	bool "Profile entire Kernel"
	36	depends on GCOV_KERNEL
1f74b1f7	37	depends on S390 \|\| X86 \|\| (PPC && EXPERIMENTAL) \|\| MICROBLAZE
2521f2c2 PO	38	default n
	39	---help---
	40	This options activates profiling for the entire kernel.
	41
	42	If unsure, say N.
	43
	44	Note that a kernel compiled with profiling flags will be significantly
	45	larger and run slower. Also be sure to exclude files from profiling
	46	which are not linked to the kernel image to prevent linker errors.
	47
	48	endmenu