diff options
| -rw-r--r-- | kernel/rcutree.c | 2 | ||||
| -rw-r--r-- | kernel/rcutree.h | 6 | ||||
| -rw-r--r-- | lib/Kconfig.debug | 13 |
3 files changed, 20 insertions, 1 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index 5d910beefff..5aab7dabd0d 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -144,7 +144,7 @@ module_param(qhimark, int, 0); module_param(qlowmark, int, 0); #ifdef CONFIG_RCU_CPU_STALL_DETECTOR -int rcu_cpu_stall_suppress __read_mostly; +int rcu_cpu_stall_suppress __read_mostly = RCU_CPU_STALL_SUPPRESS_INIT; module_param(rcu_cpu_stall_suppress, int, 0644); #endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */ diff --git a/kernel/rcutree.h b/kernel/rcutree.h index 183ebf40531..bb4d08695c4 100644 --- a/kernel/rcutree.h +++ b/kernel/rcutree.h @@ -264,6 +264,12 @@ struct rcu_data { /* scheduling clock irq */ /* before ratting on them. */ +#ifdef CONFIG_RCU_CPU_STALL_DETECTOR_RUNNABLE +#define RCU_CPU_STALL_SUPPRESS_INIT 0 +#else +#define RCU_CPU_STALL_SUPPRESS_INIT 1 +#endif + #endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */ #define ULONG_CMP_GE(a, b) (ULONG_MAX / 2 >= (a) - (b)) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index b5005b76210..52c2172dff1 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -856,6 +856,19 @@ config RCU_CPU_STALL_TIMEOUT RCU grace period persists, additional CPU stall warnings are printed at more widely spaced intervals. +config RCU_CPU_STALL_DETECTOR_RUNNABLE + bool "RCU CPU stall checking starts automatically at boot" + depends on RCU_CPU_STALL_DETECTOR + default y + help + If set, start checking for RCU CPU stalls immediately on + boot. Otherwise, RCU CPU stall checking must be manually + enabled. + + Say Y if you are unsure. + + Say N if you wish to suppress RCU CPU stall checking during boot. + config RCU_CPU_STALL_VERBOSE bool "Print additional per-task information for RCU_CPU_STALL_DETECTOR" depends on RCU_CPU_STALL_DETECTOR && TREE_PREEMPT_RCU |