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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-03-16 11:01:55 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-04-27 11:03:51 -0700 |
| commit | e21408ceec2de5be418efa39feb1e2c00f824a72 (patch) | |
| tree | 02e806c8a35c09b6facd504beb8dd57ba37ad63b /kernel/rcu/tasks.h | |
| parent | 8fd8ca388ccf233b8ae0b6b42ddc7caa5034ae85 (diff) | |
| download | lwn-e21408ceec2de5be418efa39feb1e2c00f824a72.tar.gz lwn-e21408ceec2de5be418efa39feb1e2c00f824a72.zip | |
rcu-tasks: Add RCU tasks to rcutorture writer stall output
This commit adds state for each RCU-tasks flavor to the rcutorture
writer stall output. The initial state is minimal, but you have to
start somewhere.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
[ paulmck: Fixes based on feedback from kbuild test robot. ]
Diffstat (limited to 'kernel/rcu/tasks.h')
| -rw-r--r-- | kernel/rcu/tasks.h | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index b7e3e1d28a5c..e4f89425d2c4 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -219,6 +219,16 @@ static void __init rcu_tasks_bootup_oddness(void) #endif /* #ifndef CONFIG_TINY_RCU */ +/* Dump out rcutorture-relevant state common to all RCU-tasks flavors. */ +static void show_rcu_tasks_generic_gp_kthread(struct rcu_tasks *rtp, char *s) +{ + pr_info("%s %c%c %s\n", + rtp->kname, + ".k"[!!data_race(rtp->kthread_ptr)], + ".C"[!!data_race(rtp->cbs_head)], + s); +} + #ifdef CONFIG_TASKS_RCU //////////////////////////////////////////////////////////////////////// @@ -482,7 +492,14 @@ static int __init rcu_spawn_tasks_kthread(void) } core_initcall(rcu_spawn_tasks_kthread); -#endif /* #ifdef CONFIG_TASKS_RCU */ +static void show_rcu_tasks_classic_gp_kthread(void) +{ + show_rcu_tasks_generic_gp_kthread(&rcu_tasks, ""); +} + +#else /* #ifdef CONFIG_TASKS_RCU */ +static void show_rcu_tasks_classic_gp_kthread(void) { } +#endif /* #else #ifdef CONFIG_TASKS_RCU */ #ifdef CONFIG_TASKS_RUDE_RCU @@ -578,7 +595,14 @@ static int __init rcu_spawn_tasks_rude_kthread(void) } core_initcall(rcu_spawn_tasks_rude_kthread); -#endif /* #ifdef CONFIG_TASKS_RUDE_RCU */ +static void show_rcu_tasks_rude_gp_kthread(void) +{ + show_rcu_tasks_generic_gp_kthread(&rcu_tasks_rude, ""); +} + +#else /* #ifdef CONFIG_TASKS_RUDE_RCU */ +static void show_rcu_tasks_rude_gp_kthread(void) {} +#endif /* #else #ifdef CONFIG_TASKS_RUDE_RCU */ //////////////////////////////////////////////////////////////////////// // @@ -982,10 +1006,27 @@ static int __init rcu_spawn_tasks_trace_kthread(void) } core_initcall(rcu_spawn_tasks_trace_kthread); +static void show_rcu_tasks_trace_gp_kthread(void) +{ + char buf[32]; + + sprintf(buf, "N%d", atomic_read(&trc_n_readers_need_end)); + show_rcu_tasks_generic_gp_kthread(&rcu_tasks_trace, buf); +} + #else /* #ifdef CONFIG_TASKS_TRACE_RCU */ void exit_tasks_rcu_finish_trace(struct task_struct *t) { } +static inline void show_rcu_tasks_trace_gp_kthread(void) {} #endif /* #else #ifdef CONFIG_TASKS_TRACE_RCU */ +void show_rcu_tasks_gp_kthreads(void) +{ + show_rcu_tasks_classic_gp_kthread(); + show_rcu_tasks_rude_gp_kthread(); + show_rcu_tasks_trace_gp_kthread(); +} + #else /* #ifdef CONFIG_TASKS_RCU_GENERIC */ static inline void rcu_tasks_bootup_oddness(void) {} +void show_rcu_tasks_gp_kthreads(void) {} #endif /* #else #ifdef CONFIG_TASKS_RCU_GENERIC */ |