rcu, debug: detect stalled grace periods

[linux-2.6-omap-h63xx.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index e1d4764435ed842ea1875c7739bfd668f6453fae..2fb6d90bf1e6023cf1acd977c732163fc930340f 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -597,6 +597,19 @@ 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_CPU_STALL
+       bool "Check for stalled CPUs delaying RCU grace periods"
+       depends on CLASSIC_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