Merge branches 'doc.2015.02.26a', 'earlycb.2015.03.03a', 'fixes.2015.03.03a', 'gpexp...

[pandora-kernel.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index c5cefb3..1ad74c0 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1180,16 +1180,7 @@ config DEBUG_CREDENTIALS
 menu "RCU Debugging"
 
 config PROVE_RCU
-       bool "RCU debugging: prove RCU correctness"
-       depends on PROVE_LOCKING
-       default n
-       help
-        This feature enables lockdep extensions that check for correct
-        use of RCU APIs.  This is currently under development.  Say Y
-        if you want to debug RCU usage or help work on the PROVE_RCU
-        feature.
-
-        Say N if you are unsure.
+       def_bool PROVE_LOCKING
 
 config PROVE_RCU_REPEATEDLY
        bool "RCU debugging: don't disable PROVE_RCU on first splat"
@@ -1257,6 +1248,30 @@ config RCU_TORTURE_TEST_RUNNABLE
          Say N here if you want the RCU torture tests to start only
          after being manually enabled via /proc.
 
+config RCU_TORTURE_TEST_SLOW_INIT
+       bool "Slow down RCU grace-period initialization to expose races"
+       depends on RCU_TORTURE_TEST
+       help
+         This option makes grace-period initialization block for a
+         few jiffies between initializing each pair of consecutive
+         rcu_node structures.  This helps to expose races involving
+         grace-period initialization, in other words, it makes your
+         kernel less stable.  It can also greatly increase grace-period
+         latency, especially on systems with large numbers of CPUs.
+         This is useful when torture-testing RCU, but in almost no
+         other circumstance.
+
+         Say Y here if you want your system to crash and hang more often.
+         Say N if you want a sane system.
+
+config RCU_TORTURE_TEST_SLOW_INIT_DELAY
+       int "How much to slow down RCU grace-period initialization"
+       range 0 5
+       default 3
+       help
+         This option specifies the number of jiffies to wait between
+         each rcu_node structure initialization.
+
 config RCU_CPU_STALL_TIMEOUT
        int "RCU CPU stall timeout in seconds"
        depends on RCU_STALL_COMMON