torture_param(bool, gp_normal, false, "Use normal (non-expedited) GP wait primitives");
torture_param(bool, gp_poll, false, "Use polling GP wait primitives");
torture_param(bool, gp_poll_exp, false, "Use polling expedited GP wait primitives");
+torture_param(bool, gp_poll_full, false, "Use polling full-state GP wait primitives");
torture_param(bool, gp_sync, false, "Use synchronous GP wait primitives");
torture_param(int, irqreader, 1, "Allow RCU readers from irq handlers");
torture_param(int, leakpointer, 0, "Leak pointer dereferences from readers");
#define RTWS_COND_SYNC 7
#define RTWS_COND_SYNC_EXP 8
#define RTWS_POLL_GET 9
-#define RTWS_POLL_GET_EXP 10
-#define RTWS_POLL_WAIT 11
-#define RTWS_POLL_WAIT_EXP 12
-#define RTWS_SYNC 13
-#define RTWS_STUTTER 14
-#define RTWS_STOPPING 15
+#define RTWS_POLL_GET_FULL 10
+#define RTWS_POLL_GET_EXP 11
+#define RTWS_POLL_WAIT 12
+#define RTWS_POLL_WAIT_FULL 13
+#define RTWS_POLL_WAIT_EXP 14
+#define RTWS_SYNC 15
+#define RTWS_STUTTER 16
+#define RTWS_STOPPING 17
static const char * const rcu_torture_writer_state_names[] = {
"RTWS_FIXED_DELAY",
"RTWS_DELAY",
"RTWS_COND_SYNC",
"RTWS_COND_SYNC_EXP",
"RTWS_POLL_GET",
+ "RTWS_POLL_GET_FULL",
"RTWS_POLL_GET_EXP",
"RTWS_POLL_WAIT",
+ "RTWS_POLL_WAIT_FULL",
"RTWS_POLL_WAIT_EXP",
"RTWS_SYNC",
"RTWS_STUTTER",
unsigned long (*get_gp_completed)(void);
void (*get_gp_completed_full)(struct rcu_gp_oldstate *rgosp);
unsigned long (*start_gp_poll)(void);
+ void (*start_gp_poll_full)(struct rcu_gp_oldstate *rgosp);
bool (*poll_gp_state)(unsigned long oldstate);
bool (*poll_gp_state_full)(struct rcu_gp_oldstate *rgosp);
bool (*poll_need_2gp)(bool poll, bool poll_full);
.get_gp_completed = get_completed_synchronize_rcu,
.get_gp_completed_full = get_completed_synchronize_rcu_full,
.start_gp_poll = start_poll_synchronize_rcu,
+ .start_gp_poll_full = start_poll_synchronize_rcu_full,
.poll_gp_state = poll_state_synchronize_rcu,
.poll_gp_state_full = poll_state_synchronize_rcu_full,
.poll_need_2gp = rcu_poll_need_2gp,
{
bool gp_cond1 = gp_cond, gp_cond_exp1 = gp_cond_exp, gp_exp1 = gp_exp;
bool gp_poll_exp1 = gp_poll_exp, gp_normal1 = gp_normal, gp_poll1 = gp_poll;
- bool gp_sync1 = gp_sync;
+ bool gp_poll_full1 = gp_poll_full, gp_sync1 = gp_sync;
/* Initialize synctype[] array. If none set, take default. */
if (!gp_cond1 && !gp_cond_exp1 && !gp_exp1 && !gp_poll_exp &&
- !gp_normal1 && !gp_poll1 && !gp_sync1)
+ !gp_normal1 && !gp_poll1 && !gp_poll_full1 && !gp_sync1)
gp_cond1 = gp_cond_exp1 = gp_exp1 = gp_poll_exp1 =
- gp_normal1 = gp_poll1 = gp_sync1 = true;
+ gp_normal1 = gp_poll1 = gp_poll_full1 = gp_sync1 = true;
if (gp_cond1 && cur_ops->get_gp_state && cur_ops->cond_sync) {
synctype[nsynctypes++] = RTWS_COND_GET;
pr_info("%s: Testing conditional GPs.\n", __func__);
} else if (gp_poll && (!cur_ops->start_gp_poll || !cur_ops->poll_gp_state)) {
pr_alert("%s: gp_poll without primitives.\n", __func__);
}
+ if (gp_poll_full1 && cur_ops->start_gp_poll_full && cur_ops->poll_gp_state_full) {
+ synctype[nsynctypes++] = RTWS_POLL_GET_FULL;
+ pr_info("%s: Testing polling full-state GPs.\n", __func__);
+ } else if (gp_poll_full && (!cur_ops->start_gp_poll_full || !cur_ops->poll_gp_state_full)) {
+ pr_alert("%s: gp_poll_full without primitives.\n", __func__);
+ }
if (gp_poll_exp1 && cur_ops->start_gp_poll_exp && cur_ops->poll_gp_state_exp) {
synctype[nsynctypes++] = RTWS_POLL_GET_EXP;
pr_info("%s: Testing polling expedited GPs.\n", __func__);
struct rcu_gp_oldstate cookie_full;
int expediting = 0;
unsigned long gp_snap;
+ struct rcu_gp_oldstate gp_snap_full;
int i;
int idx;
int oldnice = task_nice(current);
&rand);
rcu_torture_pipe_update(old_rp);
break;
+ case RTWS_POLL_GET_FULL:
+ rcu_torture_writer_state = RTWS_POLL_GET_FULL;
+ cur_ops->start_gp_poll_full(&gp_snap_full);
+ rcu_torture_writer_state = RTWS_POLL_WAIT_FULL;
+ while (!cur_ops->poll_gp_state_full(&gp_snap_full))
+ torture_hrtimeout_jiffies(torture_random(&rand) % 16,
+ &rand);
+ rcu_torture_pipe_update(old_rp);
+ break;
case RTWS_POLL_GET_EXP:
rcu_torture_writer_state = RTWS_POLL_GET_EXP;
gp_snap = cur_ops->start_gp_poll_exp();
rcu_torture_fakewriter(void *arg)
{
unsigned long gp_snap;
+ struct rcu_gp_oldstate gp_snap_full;
DEFINE_TORTURE_RANDOM(rand);
VERBOSE_TOROUT_STRING("rcu_torture_fakewriter task started");
&rand);
}
break;
+ case RTWS_POLL_GET_FULL:
+ cur_ops->start_gp_poll_full(&gp_snap_full);
+ while (!cur_ops->poll_gp_state_full(&gp_snap_full)) {
+ torture_hrtimeout_jiffies(torture_random(&rand) % 16,
+ &rand);
+ }
+ break;
case RTWS_POLL_GET_EXP:
gp_snap = cur_ops->start_gp_poll_exp();
while (!cur_ops->poll_gp_state_exp(gp_snap)) {
}
EXPORT_SYMBOL_GPL(get_state_synchronize_rcu_full);
-/**
- * start_poll_synchronize_rcu - Snapshot and start RCU grace period
- *
- * Returns a cookie that is used by a later call to cond_synchronize_rcu()
- * or poll_state_synchronize_rcu() to determine whether or not a full
- * grace period has elapsed in the meantime. If the needed grace period
- * is not already slated to start, notifies RCU core of the need for that
- * grace period.
- *
- * Interrupts must be enabled for the case where it is necessary to awaken
- * the grace-period kthread.
+/*
+ * Helper function for start_poll_synchronize_rcu() and
+ * start_poll_synchronize_rcu_full().
*/
-unsigned long start_poll_synchronize_rcu(void)
+static void start_poll_synchronize_rcu_common(void)
{
unsigned long flags;
- unsigned long gp_seq = get_state_synchronize_rcu();
bool needwake;
struct rcu_data *rdp;
struct rcu_node *rnp;
raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
if (needwake)
rcu_gp_kthread_wake();
+}
+
+/**
+ * start_poll_synchronize_rcu - Snapshot and start RCU grace period
+ *
+ * Returns a cookie that is used by a later call to cond_synchronize_rcu()
+ * or poll_state_synchronize_rcu() to determine whether or not a full
+ * grace period has elapsed in the meantime. If the needed grace period
+ * is not already slated to start, notifies RCU core of the need for that
+ * grace period.
+ *
+ * Interrupts must be enabled for the case where it is necessary to awaken
+ * the grace-period kthread.
+ */
+unsigned long start_poll_synchronize_rcu(void)
+{
+ unsigned long gp_seq = get_state_synchronize_rcu();
+
+ start_poll_synchronize_rcu_common();
return gp_seq;
}
EXPORT_SYMBOL_GPL(start_poll_synchronize_rcu);
+/**
+ * start_poll_synchronize_rcu_full - Take a full snapshot and start RCU grace period
+ * @rgosp: value from get_state_synchronize_rcu_full() or start_poll_synchronize_rcu_full()
+ *
+ * Places the normal and expedited grace-period states in *@rgos. This
+ * state value can be passed to a later call to cond_synchronize_rcu_full()
+ * or poll_state_synchronize_rcu_full() to determine whether or not a
+ * grace period (whether normal or expedited) has elapsed in the meantime.
+ * If the needed grace period is not already slated to start, notifies
+ * RCU core of the need for that grace period.
+ *
+ * Interrupts must be enabled for the case where it is necessary to awaken
+ * the grace-period kthread.
+ */
+void start_poll_synchronize_rcu_full(struct rcu_gp_oldstate *rgosp)
+{
+ get_state_synchronize_rcu_full(rgosp);
+
+ start_poll_synchronize_rcu_common();
+}
+EXPORT_SYMBOL_GPL(start_poll_synchronize_rcu_full);
+
/**
* poll_state_synchronize_rcu - Has the specified RCU grace period completed?
*