mm: have order > 0 compaction start near a pageblock with free pages

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 4a186508bf8b98de56872d254cc405f3a47c0cb2..2403a63b5da5bcf4e978d5dc2dfe8682cebef453 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1084,18 +1084,105 @@ 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