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| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-06-13 15:30:49 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-08-01 14:05:51 -0700 |
| commit | cdc694b2359d52cd6d0465d5a6263d97c786fb0c (patch) | |
| tree | b23b91ce2d46cfbbb52f2bcd546cc1c471adb662 /kernel/rcu/update.c | |
| parent | 1f3ebc8253ee56bfaa883c5114fb5569c56f6197 (diff) | |
| download | linux-cdc694b2359d52cd6d0465d5a6263d97c786fb0c.tar.bz2 | |
rcu: Add kernel parameter to dump trace after RCU CPU stall warning
This commit adds a rcu_cpu_stall_ftrace_dump kernel boot parameter, that,
when set, causes the trace buffer to be dumped after an RCU CPU stall
warning is printed. This kernel boot parameter is disabled by default,
maintaining compatibility with previous behavior.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/rcu/update.c')
| -rw-r--r-- | kernel/rcu/update.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index 61df2bf08563..249517058b13 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -437,6 +437,8 @@ EXPORT_SYMBOL_GPL(rcutorture_sched_setaffinity); #endif #ifdef CONFIG_RCU_STALL_COMMON +int rcu_cpu_stall_ftrace_dump __read_mostly; +module_param(rcu_cpu_stall_ftrace_dump, int, 0644); int rcu_cpu_stall_suppress __read_mostly; /* 1 = suppress stall warnings. */ EXPORT_SYMBOL_GPL(rcu_cpu_stall_suppress); module_param(rcu_cpu_stall_suppress, int, 0644); |