sched: Ensure 'sched_domains_numa_levels' is safe to use in other functions

[platform/adaptation/renesas_rcar/renesas_kernel.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index ff5bdee..dacbbe4 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -629,6 +629,20 @@ config PROVE_RCU_REPEATEDLY
 
         Say N if you are unsure.
 
+config PROVE_RCU_DELAY
+       bool "RCU debugging: preemptible RCU race provocation"
+       depends on DEBUG_KERNEL && PREEMPT_RCU
+       default n
+       help
+        There is a class of races that involve an unlikely preemption
+        of __rcu_read_unlock() just after ->rcu_read_lock_nesting has
+        been set to INT_MIN.  This feature inserts a delay at that
+        point to increase the probability of these races.
+
+        Say Y to increase probability of preemption of __rcu_read_unlock().
+
+        Say N if you are unsure.
+
 config SPARSE_RCU_POINTER
        bool "RCU debugging: sparse-based checks for pointer usage"
        default n
@@ -714,7 +728,7 @@ config STACKTRACE
 
 config DEBUG_STACK_USAGE
        bool "Stack utilization instrumentation"
-       depends on DEBUG_KERNEL
+       depends on DEBUG_KERNEL && !IA64 && !PARISC
        help
          Enables the display of the minimum amount of free stack which each
          task has ever had available in the sysrq-T and sysrq-P debug output.
@@ -1084,18 +1098,105 @@ config LKDTM
        Documentation on how to use the module can be found in
        Documentation/fault-injection/provoke-crashes.txt
 
+config NOTIFIER_ERROR_INJECTION
+       tristate "Notifier error injection"
+       depends on DEBUG_KERNEL
+       select DEBUG_FS
+       help
+         This option provides the ability to inject artifical errors to
+         specified notifier chain callbacks. It is useful to test the error
+         handling of notifier call chain failures.
+
+         Say N if unsure.
+
 config CPU_NOTIFIER_ERROR_INJECT
        tristate "CPU notifier error injection module"
-       depends on HOTPLUG_CPU && DEBUG_KERNEL
+       depends on HOTPLUG_CPU && NOTIFIER_ERROR_INJECTION
        help
          This option provides a kernel module that can be used to test
-         the error handling of the cpu notifiers
+         the error handling of the cpu notifiers by injecting artifical
+         errors to CPU notifier chain callbacks.  It is controlled through
+         debugfs interface under /sys/kernel/debug/notifier-error-inject/cpu
+
+         If the notifier call chain should be failed with some events
+         notified, write the error code to "actions/<notifier event>/error".
+
+         Example: Inject CPU offline error (-1 == -EPERM)
+
+         # cd /sys/kernel/debug/notifier-error-inject/cpu
+         # echo -1 > actions/CPU_DOWN_PREPARE/error
+         # echo 0 > /sys/devices/system/cpu/cpu1/online
+         bash: echo: write error: Operation not permitted
 
          To compile this code as a module, choose M here: the module will
          be called cpu-notifier-error-inject.
 
          If unsure, say N.
 
+config PM_NOTIFIER_ERROR_INJECT
+       tristate "PM notifier error injection module"
+       depends on PM && NOTIFIER_ERROR_INJECTION
+       default m if PM_DEBUG
+       help
+         This option provides the ability to inject artifical errors to
+         PM notifier chain callbacks.  It is controlled through debugfs
+         interface /sys/kernel/debug/notifier-error-inject/pm
+
+         If the notifier call chain should be failed with some events
+         notified, write the error code to "actions/<notifier event>/error".
+
+         Example: Inject PM suspend error (-12 = -ENOMEM)
+
+         # cd /sys/kernel/debug/notifier-error-inject/pm/
+         # echo -12 > actions/PM_SUSPEND_PREPARE/error
+         # echo mem > /sys/power/state
+         bash: echo: write error: Cannot allocate memory
+
+         To compile this code as a module, choose M here: the module will
+         be called pm-notifier-error-inject.
+
+         If unsure, say N.
+
+config MEMORY_NOTIFIER_ERROR_INJECT
+       tristate "Memory hotplug notifier error injection module"
+       depends on MEMORY_HOTPLUG_SPARSE && NOTIFIER_ERROR_INJECTION
+       help
+         This option provides the ability to inject artifical errors to
+         memory hotplug notifier chain callbacks.  It is controlled through
+         debugfs interface under /sys/kernel/debug/notifier-error-inject/memory
+
+         If the notifier call chain should be failed with some events
+         notified, write the error code to "actions/<notifier event>/error".
+
+         Example: Inject memory hotplug offline error (-12 == -ENOMEM)
+
+         # cd /sys/kernel/debug/notifier-error-inject/memory
+         # echo -12 > actions/MEM_GOING_OFFLINE/error
+         # echo offline > /sys/devices/system/memory/memoryXXX/state
+         bash: echo: write error: Cannot allocate memory
+
+         To compile this code as a module, choose M here: the module will
+         be called pSeries-reconfig-notifier-error-inject.
+
+         If unsure, say N.
+
+config PSERIES_RECONFIG_NOTIFIER_ERROR_INJECT
+       tristate "pSeries reconfig notifier error injection module"
+       depends on PPC_PSERIES && NOTIFIER_ERROR_INJECTION
+       help
+         This option provides the ability to inject artifical errors to
+         pSeries reconfig notifier chain callbacks.  It is controlled
+         through debugfs interface under
+         /sys/kernel/debug/notifier-error-inject/pSeries-reconfig/
+
+         If the notifier call chain should be failed with some events
+         notified, write the error code to "actions/<notifier event>/error".
+
+         To compile this code as a module, choose M here: the module will
+         be called memory-notifier-error-inject.
+
+         If unsure, say N.
+
 config FAULT_INJECTION
        bool "Fault-injection framework"
        depends on DEBUG_KERNEL