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Commit 291783b8 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

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: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 9efafb88

include/linux/rcutiny.h

+16 −0
Original line number Diff line number Diff line
@@ -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)

{

}

include/linux/rcutree.h

+2 −0
Original line number Diff line number Diff line
@@ -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);

kernel/rcu/tree.c

+22 −0
Original line number Diff line number Diff line
@@ -459,6 +459,28 @@ 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.

 */