diff options
| 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/rcu.h | |
| parent | 1f3ebc8253ee56bfaa883c5114fb5569c56f6197 (diff) | |
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/rcu.h')
| -rw-r--r-- | kernel/rcu/rcu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h index 5290b01de534..8fd4f82c9b3d 100644 --- a/kernel/rcu/rcu.h +++ b/kernel/rcu/rcu.h @@ -227,6 +227,7 @@ static inline bool __rcu_reclaim(const char *rn, struct rcu_head *head) #ifdef CONFIG_RCU_STALL_COMMON +extern int rcu_cpu_stall_ftrace_dump; extern int rcu_cpu_stall_suppress; extern int rcu_cpu_stall_timeout; int rcu_jiffies_till_stall_check(void); |