rcu: add call_rcu_sched() and friends to rcutorture
Add entry to rcu_torture_ops allowing the correct barrier function to
be used upon exit from rcutorture. Also add torture options for the
new call_rcu_sched() API.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 33acc424..0334b6a 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -192,6 +192,7 @@
int (*completed)(void);
void (*deferredfree)(struct rcu_torture *p);
void (*sync)(void);
+ void (*cb_barrier)(void);
int (*stats)(char *page);
char *name;
};
@@ -265,6 +266,7 @@
.completed = rcu_torture_completed,
.deferredfree = rcu_torture_deferred_free,
.sync = synchronize_rcu,
+ .cb_barrier = rcu_barrier,
.stats = NULL,
.name = "rcu"
};
@@ -304,6 +306,7 @@
.completed = rcu_torture_completed,
.deferredfree = rcu_sync_torture_deferred_free,
.sync = synchronize_rcu,
+ .cb_barrier = NULL,
.stats = NULL,
.name = "rcu_sync"
};
@@ -364,6 +367,7 @@
.completed = rcu_bh_torture_completed,
.deferredfree = rcu_bh_torture_deferred_free,
.sync = rcu_bh_torture_synchronize,
+ .cb_barrier = rcu_barrier_bh,
.stats = NULL,
.name = "rcu_bh"
};
@@ -377,6 +381,7 @@
.completed = rcu_bh_torture_completed,
.deferredfree = rcu_sync_torture_deferred_free,
.sync = rcu_bh_torture_synchronize,
+ .cb_barrier = NULL,
.stats = NULL,
.name = "rcu_bh_sync"
};
@@ -458,6 +463,7 @@
.completed = srcu_torture_completed,
.deferredfree = rcu_sync_torture_deferred_free,
.sync = srcu_torture_synchronize,
+ .cb_barrier = NULL,
.stats = srcu_torture_stats,
.name = "srcu"
};
@@ -482,6 +488,11 @@
return 0;
}
+static void rcu_sched_torture_deferred_free(struct rcu_torture *p)
+{
+ call_rcu_sched(&p->rtort_rcu, rcu_torture_cb);
+}
+
static void sched_torture_synchronize(void)
{
synchronize_sched();
@@ -494,12 +505,27 @@
.readdelay = rcu_read_delay, /* just reuse rcu's version. */
.readunlock = sched_torture_read_unlock,
.completed = sched_torture_completed,
- .deferredfree = rcu_sync_torture_deferred_free,
+ .deferredfree = rcu_sched_torture_deferred_free,
.sync = sched_torture_synchronize,
+ .cb_barrier = rcu_barrier_sched,
.stats = NULL,
.name = "sched"
};
+static struct rcu_torture_ops sched_ops_sync = {
+ .init = rcu_sync_torture_init,
+ .cleanup = NULL,
+ .readlock = sched_torture_read_lock,
+ .readdelay = rcu_read_delay, /* just reuse rcu's version. */
+ .readunlock = sched_torture_read_unlock,
+ .completed = sched_torture_completed,
+ .deferredfree = rcu_sync_torture_deferred_free,
+ .sync = sched_torture_synchronize,
+ .cb_barrier = NULL,
+ .stats = NULL,
+ .name = "sched_sync"
+};
+
/*
* RCU torture writer kthread. Repeatedly substitutes a new structure
* for that pointed to by rcu_torture_current, freeing the old structure
@@ -848,7 +874,9 @@
stats_task = NULL;
/* Wait for all RCU callbacks to fire. */
- rcu_barrier();
+
+ if (cur_ops->cb_barrier != NULL)
+ cur_ops->cb_barrier();
rcu_torture_stats_print(); /* -After- the stats thread is stopped! */
@@ -868,7 +896,7 @@
int firsterr = 0;
static struct rcu_torture_ops *torture_ops[] =
{ &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops,
- &srcu_ops, &sched_ops, };
+ &srcu_ops, &sched_ops, &sched_ops_sync, };
/* Process args and tell the world that the torturer is on the job. */
for (i = 0; i < ARRAY_SIZE(torture_ops); i++) {