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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-12-19 18:02:20 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-01-03 17:47:44 -0800 |
| commit | 92987fe8bdd1cbec61919a394bb11316c5d860f4 (patch) | |
| tree | 2308b37ef7d2ebeb57c0a2391a51fccce00d53d1 /kernel/rcu/update.c | |
| parent | 748bf47a89d722c7e77f8700705e2189be14e99e (diff) | |
| download | lwn-92987fe8bdd1cbec61919a394bb11316c5d860f4.tar.gz lwn-92987fe8bdd1cbec61919a394bb11316c5d860f4.zip | |
rcu: Allow expedited RCU CPU stall warnings to dump task stacks
This commit introduces the rcupdate.rcu_exp_stall_task_details kernel
boot parameter, which cause expedited RCU CPU stall warnings to dump
the stacks of any tasks blocking the current expedited grace period.
Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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 587b97c40191..6ed5020aee6d 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -509,6 +509,8 @@ int rcu_cpu_stall_timeout __read_mostly = CONFIG_RCU_CPU_STALL_TIMEOUT; module_param(rcu_cpu_stall_timeout, int, 0644); int rcu_exp_cpu_stall_timeout __read_mostly = CONFIG_RCU_EXP_CPU_STALL_TIMEOUT; module_param(rcu_exp_cpu_stall_timeout, int, 0644); +bool rcu_exp_stall_task_details __read_mostly; +module_param(rcu_exp_stall_task_details, bool, 0644); #endif /* #ifdef CONFIG_RCU_STALL_COMMON */ // Suppress boot-time RCU CPU stall warnings and rcutorture writer stall |