Commit 43a0a2a7 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Move RCU debug Kconfig options to kernel/rcu 



RCU's debugging Kconfig options are in the unintuitive location
lib/Kconfig.debug, and there are enough of them that it would be good for
them to be more centralized.  This commit therefore extracts RCU's Kconfig
options from init/Kconfig into a new kernel/rcu/Kconfig.debug file.

Reported-by: default avatarIngo Molnar <mingo@kernel.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 0af92d46

kernel/rcu/Kconfig.debug

0 → 100644
+82 −0
Original line number Diff line number Diff line 
#

# 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"

lib/Kconfig.debug

+1 −78
Original line number Diff line number Diff line
@@ -1301,84 +1301,7 @@ config DEBUG_CREDENTIALS 


	  If unsure, say N.



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"

source "kernel/rcu/Kconfig.debug"



config DEBUG_WQ_FORCE_RR_CPU

	bool "Force round-robin CPU selection for unbound work items"