#
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# RCU-related debugging configuration options
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#
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menu "RCU Debugging"
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config PROVE_RCU
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def_bool PROVE_LOCKING
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config TORTURE_TEST
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tristate
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default n
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config RCU_PERF_TEST
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tristate "performance tests for RCU"
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depends on DEBUG_KERNEL
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select TORTURE_TEST
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select SRCU
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select TASKS_RCU
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default n
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help
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This option provides a kernel module that runs performance
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tests on the RCU infrastructure. The kernel module may be built
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after the fact on the running kernel to be tested, if desired.
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Say Y here if you want RCU performance tests to be built into
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the kernel.
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Say M if you want the RCU performance tests to build as a module.
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Say N if you are unsure.
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config RCU_TORTURE_TEST
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tristate "torture tests for RCU"
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depends on DEBUG_KERNEL
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select TORTURE_TEST
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select SRCU
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select TASKS_RCU
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default n
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help
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This option provides a kernel module that runs torture tests
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on the RCU infrastructure. The kernel module may be built
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after the fact on the running kernel to be tested, if desired.
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Say Y here if you want RCU torture tests to be built into
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the kernel.
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Say M if you want the RCU torture tests to build as a module.
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Say N if you are unsure.
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config RCU_CPU_STALL_TIMEOUT
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int "RCU CPU stall timeout in seconds"
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depends on RCU_STALL_COMMON
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range 3 300
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default 21
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help
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If a given RCU grace period extends more than the specified
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number of seconds, a CPU stall warning is printed. If the
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RCU grace period persists, additional CPU stall warnings are
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printed at more widely spaced intervals.
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config BOOTPARAM_RCU_STALL_PANIC
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bool "Panic (Reboot) On RCU CPU stall timeout"
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depends on RCU_STALL_COMMON
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help
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Say Y here to enable the kernel to panic on "rcu stall timeout",
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which are bugs that RCU grace period extends more than 21 seconds
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(configurable using the RCU_CPU_STALL_TIMEOUT).
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The panic can be used in combination with panic_timeout,
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to cause the system to reboot automatically after a
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stall timeout. This feature is useful for high-availability
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systems that have uptime guarantees and where a stall timeout
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must be resolved ASAP.
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Say N if unsure.
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config BOOTPARAM_RCU_STALL_PANIC_VALUE
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int
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depends on RCU_STALL_COMMON
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range 0 1
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default 0 if !BOOTPARAM_RCU_STALL_PANIC
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default 1 if BOOTPARAM_RCU_STALL_PANIC
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config RCU_TRACE
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bool "Enable tracing for RCU"
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depends on DEBUG_KERNEL
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default y if TREE_RCU
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select TRACE_CLOCK
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help
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This option enables additional tracepoints for ftrace-style
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event tracing.
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Say Y here if you want to enable RCU tracing
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Say N if you are unsure.
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config RCU_EQS_DEBUG
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bool "Provide debugging asserts for adding NO_HZ support to an arch"
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depends on DEBUG_KERNEL
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help
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This option provides consistency checks in RCU's handling of
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NO_HZ. These checks have proven quite helpful in detecting
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bugs in arch-specific NO_HZ code.
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Say N here if you need ultimate kernel/user switch latencies
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Say Y if you are unsure
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endmenu # "RCU Debugging"
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