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rcu: allow RCU CPU stall warning messages to be controlled in /sys 

Set the permissions of the rcu_cpu_stall_suppress to 644 to enable RCU
CPU stall warnings to be enabled and disabled at runtime via sysfs.

Suggested-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2010-07-14 14:38:30 -07:00
parent ded5e5ed2f
commit f2e0dd7090
1 changed files with 1 additions and 1 deletions
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2
kernel/rcutree.c
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@ -145,7 +145,7 @@ module_param(qlowmark, int, 0);
#ifdef CONFIG_RCU_CPU_STALL_DETECTOR
int rcu_cpu_stall_suppress __read_mostly;
module_param(rcu_cpu_stall_suppress, int, 0);
module_param(rcu_cpu_stall_suppress, int, 0644);
#endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
static void force_quiescent_state(struct rcu_state *rsp, int relaxed);