Merge branches 'core/debugobjects', 'core/iommu', 'core/locking', 'core/printk',...

[linux-2.6-block.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 124ece1e67ad4d3225e021079988d0009326b6ec..eae594cb6ea98d896286565331efce62836fdc8f 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -553,6 +553,16 @@ config DEBUG_SG
 
          If unsure, say N.
 
+config DEBUG_NOTIFIERS
+       bool "Debug notifier call chains"
+       depends on DEBUG_KERNEL
+       help
+         Enable this to turn on sanity checking for notifier call chains.
+         This is most useful for kernel developers to make sure that
+         modules properly unregister themselves from notifier chains.
+         This is a relatively cheap check but if you care about maximum
+         performance, say N.
+
 config FRAME_POINTER
        bool "Compile the kernel with frame pointers"
        depends on DEBUG_KERNEL && \
@@ -627,6 +637,19 @@ config RCU_CPU_STALL_DETECTOR
 
          Say N if you are unsure.
 
+config RCU_CPU_STALL_DETECTOR
+       bool "Check for stalled CPUs delaying RCU grace periods"
+       depends on CLASSIC_RCU || TREE_RCU
+       default n
+       help
+         This option causes RCU to printk information on which
+         CPUs are delaying the current grace period, but only when
+         the grace period extends for excessive time periods.
+
+         Say Y if you want RCU to perform such checks.
+
+         Say N if you are unsure.
+
 config KPROBES_SANITY_TEST
        bool "Kprobes sanity tests"
        depends on DEBUG_KERNEL