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author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-01-12 13:43:30 -0800 |
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committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-03-31 13:37:37 -0700 |
commit | 291783b8ad77a83a6fdf91d55eee7f1ad72ed4d1 (patch) | |
tree | 04eee578b9ade217e1870a0f28acdd11cee4ff23 | |
parent | 9efafb8849f732a3497f46f178b350c9ff7cfe27 (diff) | |
download | linux-291783b8ad77a83a6fdf91d55eee7f1ad72ed4d1.tar.bz2 |
rcutorture: Expedited-GP batch progress access to torturing
This commit provides rcu_exp_batches_completed() and
rcu_exp_batches_completed_sched() functions to allow torture-test modules
to check how many expedited grace period batches have completed.
These are analogous to the existing rcu_batches_completed(),
rcu_batches_completed_bh(), and rcu_batches_completed_sched() functions.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-rw-r--r-- | include/linux/rcutiny.h | 16 | ||||
-rw-r--r-- | include/linux/rcutree.h | 2 | ||||
-rw-r--r-- | kernel/rcu/tree.c | 22 |
3 files changed, 40 insertions, 0 deletions
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h index 64809aea661c..93aea75029fb 100644 --- a/include/linux/rcutiny.h +++ b/include/linux/rcutiny.h @@ -149,6 +149,22 @@ static inline unsigned long rcu_batches_completed_sched(void) return 0; } +/* + * Return the number of expedited grace periods completed. + */ +static inline unsigned long rcu_exp_batches_completed(void) +{ + return 0; +} + +/* + * Return the number of expedited sched grace periods completed. + */ +static inline unsigned long rcu_exp_batches_completed_sched(void) +{ + return 0; +} + static inline void rcu_force_quiescent_state(void) { } diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index ad1eda9fa4da..5043cb823fb2 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -87,6 +87,8 @@ unsigned long rcu_batches_started_sched(void); unsigned long rcu_batches_completed(void); unsigned long rcu_batches_completed_bh(void); unsigned long rcu_batches_completed_sched(void); +unsigned long rcu_exp_batches_completed(void); +unsigned long rcu_exp_batches_completed_sched(void); void show_rcu_gp_kthreads(void); void rcu_force_quiescent_state(void); diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 531a328076bd..88df64087dfe 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -460,6 +460,28 @@ unsigned long rcu_batches_completed_bh(void) EXPORT_SYMBOL_GPL(rcu_batches_completed_bh); /* + * Return the number of RCU expedited batches completed thus far for + * debug & stats. Odd numbers mean that a batch is in progress, even + * numbers mean idle. The value returned will thus be roughly double + * the cumulative batches since boot. + */ +unsigned long rcu_exp_batches_completed(void) +{ + return rcu_state_p->expedited_sequence; +} +EXPORT_SYMBOL_GPL(rcu_exp_batches_completed); + +/* + * Return the number of RCU-sched expedited batches completed thus far + * for debug & stats. Similar to rcu_exp_batches_completed(). + */ +unsigned long rcu_exp_batches_completed_sched(void) +{ + return rcu_sched_state.expedited_sequence; +} +EXPORT_SYMBOL_GPL(rcu_exp_batches_completed_sched); + +/* * Force a quiescent state. */ void rcu_force_quiescent_state(void) |