aboutsummaryrefslogtreecommitdiffstats
path: root/kernel/rcutree.c
diff options
context:
space:
mode:
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-02-08 20:14:39 -0500
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-05-06 02:16:54 -0400
commita00e0d714fbded07a7a2254391ce9ed5a5cb9d82 (patch)
tree7c213dbf1e2561655d07749b6d689027460fb8cc /kernel/rcutree.c
parent0ee5623f9a6e52df90a78bd21179f8ab370e102e (diff)
rcu: Remove conditional compilation for RCU CPU stall warnings
The RCU CPU stall warnings can now be controlled using the rcu_cpu_stall_suppress boot-time parameter or via the same parameter from sysfs. There is therefore no longer any reason to have kernel config parameters for this feature. This commit therefore removes the RCU_CPU_STALL_DETECTOR and RCU_CPU_STALL_DETECTOR_RUNNABLE kernel config parameters. The RCU_CPU_STALL_TIMEOUT parameter remains to allow the timeout to be tuned and the RCU_CPU_STALL_VERBOSE parameter remains to allow task-stall information to be suppressed if desired. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree.c')
-rw-r--r--kernel/rcutree.c26
1 files changed, 1 insertions, 25 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index dd4aea806f8e..18f7a593d4c7 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -140,10 +140,8 @@ module_param(blimit, int, 0);
140module_param(qhimark, int, 0); 140module_param(qhimark, int, 0);
141module_param(qlowmark, int, 0); 141module_param(qlowmark, int, 0);
142 142
143#ifdef CONFIG_RCU_CPU_STALL_DETECTOR 143int rcu_cpu_stall_suppress __read_mostly;
144int rcu_cpu_stall_suppress __read_mostly = RCU_CPU_STALL_SUPPRESS_INIT;
145module_param(rcu_cpu_stall_suppress, int, 0644); 144module_param(rcu_cpu_stall_suppress, int, 0644);
146#endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
147 145
148static void force_quiescent_state(struct rcu_state *rsp, int relaxed); 146static void force_quiescent_state(struct rcu_state *rsp, int relaxed);
149static int rcu_pending(int cpu); 147static int rcu_pending(int cpu);
@@ -450,8 +448,6 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp)
450 448
451#endif /* #else #ifdef CONFIG_NO_HZ */ 449#endif /* #else #ifdef CONFIG_NO_HZ */
452 450
453#ifdef CONFIG_RCU_CPU_STALL_DETECTOR
454
455int rcu_cpu_stall_suppress __read_mostly; 451int rcu_cpu_stall_suppress __read_mostly;
456 452
457static void record_gp_stall_check_time(struct rcu_state *rsp) 453static void record_gp_stall_check_time(struct rcu_state *rsp)
@@ -587,26 +583,6 @@ static void __init check_cpu_stall_init(void)
587 atomic_notifier_chain_register(&panic_notifier_list, &rcu_panic_block); 583 atomic_notifier_chain_register(&panic_notifier_list, &rcu_panic_block);
588} 584}
589 585
590#else /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
591
592static void record_gp_stall_check_time(struct rcu_state *rsp)
593{
594}
595
596static void check_cpu_stall(struct rcu_state *rsp, struct rcu_data *rdp)
597{
598}
599
600void rcu_cpu_stall_reset(void)
601{
602}
603
604static void __init check_cpu_stall_init(void)
605{
606}
607
608#endif /* #else #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
609
610/* 586/*
611 * Update CPU-local rcu_data state to record the newly noticed grace period. 587 * Update CPU-local rcu_data state to record the newly noticed grace period.
612 * This is used both when we started the grace period and when we notice 588 * This is used both when we started the grace period and when we notice