[linux.git] / kernel / rcu / Kconfig.debug

#
# RCU-related debugging configuration options
#

menu "RCU Debugging"

config PROVE_RCU
	def_bool PROVE_LOCKING

config TORTURE_TEST
	tristate
	default n

config RCU_PERF_TEST
	tristate "performance tests for RCU"
	depends on DEBUG_KERNEL
	select TORTURE_TEST
	select SRCU
	select TASKS_RCU
	default n
	help
	  This option provides a kernel module that runs performance
	  tests on the RCU infrastructure.  The kernel module may be built
	  after the fact on the running kernel to be tested, if desired.

	  Say Y here if you want RCU performance tests to be built into
	  the kernel.
	  Say M if you want the RCU performance tests to build as a module.
	  Say N if you are unsure.

config RCU_TORTURE_TEST
	tristate "torture tests for RCU"
	depends on DEBUG_KERNEL
	select TORTURE_TEST
	select SRCU
	select TASKS_RCU
	default n
	help
	  This option provides a kernel module that runs torture tests
	  on the RCU infrastructure.  The kernel module may be built
	  after the fact on the running kernel to be tested, if desired.

	  Say Y here if you want RCU torture tests to be built into
	  the kernel.
	  Say M if you want the RCU torture tests to build as a module.
	  Say N if you are unsure.

config RCU_CPU_STALL_TIMEOUT
	int "RCU CPU stall timeout in seconds"
	depends on RCU_STALL_COMMON
	range 3 300
	default 21
	help
	  If a given RCU grace period extends more than the specified
	  number of seconds, a CPU stall warning is printed.  If the
	  RCU grace period persists, additional CPU stall warnings are
	  printed at more widely spaced intervals.

config RCU_TRACE
	bool "Enable tracing for RCU"
	depends on DEBUG_KERNEL
	default y if TREE_RCU
	select TRACE_CLOCK
	help
	  This option enables additional tracepoints for ftrace-style
	  event tracing.

	  Say Y here if you want to enable RCU tracing
	  Say N if you are unsure.

config RCU_EQS_DEBUG
	bool "Provide debugging asserts for adding NO_HZ support to an arch"
	depends on DEBUG_KERNEL
	help
	  This option provides consistency checks in RCU's handling of
	  NO_HZ.  These checks have proven quite helpful in detecting
	  bugs in arch-specific NO_HZ code.

	  Say N here if you need ultimate kernel/user switch latencies
	  Say Y if you are unsure

endmenu # "RCU Debugging"
Commit	Line	Data
43a0a2a7 PM	1	#
	2	# RCU-related debugging configuration options
	3	#
	4
	5	menu "RCU Debugging"
	6
	7	config PROVE_RCU
	8	def_bool PROVE_LOCKING
	9
	10	config TORTURE_TEST
	11	tristate
	12	default n
	13
	14	config RCU_PERF_TEST
	15	tristate "performance tests for RCU"
	16	depends on DEBUG_KERNEL
	17	select TORTURE_TEST
	18	select SRCU
	19	select TASKS_RCU
	20	default n
	21	help
	22	This option provides a kernel module that runs performance
	23	tests on the RCU infrastructure. The kernel module may be built
	24	after the fact on the running kernel to be tested, if desired.
	25
	26	Say Y here if you want RCU performance tests to be built into
	27	the kernel.
	28	Say M if you want the RCU performance tests to build as a module.
	29	Say N if you are unsure.
	30
	31	config RCU_TORTURE_TEST
	32	tristate "torture tests for RCU"
	33	depends on DEBUG_KERNEL
	34	select TORTURE_TEST
	35	select SRCU
	36	select TASKS_RCU
	37	default n
	38	help
	39	This option provides a kernel module that runs torture tests
	40	on the RCU infrastructure. The kernel module may be built
	41	after the fact on the running kernel to be tested, if desired.
	42
	43	Say Y here if you want RCU torture tests to be built into
	44	the kernel.
	45	Say M if you want the RCU torture tests to build as a module.
	46	Say N if you are unsure.
	47
	48	config RCU_CPU_STALL_TIMEOUT
	49	int "RCU CPU stall timeout in seconds"
	50	depends on RCU_STALL_COMMON
	51	range 3 300
	52	default 21
	53	help
	54	If a given RCU grace period extends more than the specified
	55	number of seconds, a CPU stall warning is printed. If the
	56	RCU grace period persists, additional CPU stall warnings are
	57	printed at more widely spaced intervals.
	58
	59	config RCU_TRACE
	60	bool "Enable tracing for RCU"
	61	depends on DEBUG_KERNEL
	62	default y if TREE_RCU
	63	select TRACE_CLOCK
	64	help
65	This option enables additional tracepoints for ftrace-style
66	event tracing.
67
68	Say Y here if you want to enable RCU tracing
69	Say N if you are unsure.
70
71	config RCU_EQS_DEBUG
72	bool "Provide debugging asserts for adding NO_HZ support to an arch"
73	depends on DEBUG_KERNEL
74	help
75	This option provides consistency checks in RCU's handling of
76	NO_HZ. These checks have proven quite helpful in detecting
77	bugs in arch-specific NO_HZ code.
78
79	Say N here if you need ultimate kernel/user switch latencies
80	Say Y if you are unsure
81
82	endmenu # "RCU Debugging"