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Diffstat (limited to 'kernel/rcutorture.c')
-rw-r--r--kernel/rcutorture.c77
1 files changed, 34 insertions, 43 deletions
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 98f51b13bb7e..764825c2685c 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -73,7 +73,7 @@ module_param(nreaders, int, 0444);
MODULE_PARM_DESC(nreaders, "Number of RCU reader threads");
module_param(nfakewriters, int, 0444);
MODULE_PARM_DESC(nfakewriters, "Number of RCU fake writer threads");
-module_param(stat_interval, int, 0444);
+module_param(stat_interval, int, 0644);
MODULE_PARM_DESC(stat_interval, "Number of seconds between stats printk()s");
module_param(verbose, bool, 0444);
MODULE_PARM_DESC(verbose, "Enable verbose debugging printk()s");
@@ -480,30 +480,6 @@ static void rcu_bh_torture_deferred_free(struct rcu_torture *p)
call_rcu_bh(&p->rtort_rcu, rcu_torture_cb);
}
-struct rcu_bh_torture_synchronize {
- struct rcu_head head;
- struct completion completion;
-};
-
-static void rcu_bh_torture_wakeme_after_cb(struct rcu_head *head)
-{
- struct rcu_bh_torture_synchronize *rcu;
-
- rcu = container_of(head, struct rcu_bh_torture_synchronize, head);
- complete(&rcu->completion);
-}
-
-static void rcu_bh_torture_synchronize(void)
-{
- struct rcu_bh_torture_synchronize rcu;
-
- init_rcu_head_on_stack(&rcu.head);
- init_completion(&rcu.completion);
- call_rcu_bh(&rcu.head, rcu_bh_torture_wakeme_after_cb);
- wait_for_completion(&rcu.completion);
- destroy_rcu_head_on_stack(&rcu.head);
-}
-
static struct rcu_torture_ops rcu_bh_ops = {
.init = NULL,
.cleanup = NULL,
@@ -512,7 +488,7 @@ static struct rcu_torture_ops rcu_bh_ops = {
.readunlock = rcu_bh_torture_read_unlock,
.completed = rcu_bh_torture_completed,
.deferred_free = rcu_bh_torture_deferred_free,
- .sync = rcu_bh_torture_synchronize,
+ .sync = synchronize_rcu_bh,
.cb_barrier = rcu_barrier_bh,
.fqs = rcu_bh_force_quiescent_state,
.stats = NULL,
@@ -528,7 +504,7 @@ static struct rcu_torture_ops rcu_bh_sync_ops = {
.readunlock = rcu_bh_torture_read_unlock,
.completed = rcu_bh_torture_completed,
.deferred_free = rcu_sync_torture_deferred_free,
- .sync = rcu_bh_torture_synchronize,
+ .sync = synchronize_rcu_bh,
.cb_barrier = NULL,
.fqs = rcu_bh_force_quiescent_state,
.stats = NULL,
@@ -536,6 +512,22 @@ static struct rcu_torture_ops rcu_bh_sync_ops = {
.name = "rcu_bh_sync"
};
+static struct rcu_torture_ops rcu_bh_expedited_ops = {
+ .init = rcu_sync_torture_init,
+ .cleanup = NULL,
+ .readlock = rcu_bh_torture_read_lock,
+ .read_delay = rcu_read_delay, /* just reuse rcu's version. */
+ .readunlock = rcu_bh_torture_read_unlock,
+ .completed = rcu_bh_torture_completed,
+ .deferred_free = rcu_sync_torture_deferred_free,
+ .sync = synchronize_rcu_bh_expedited,
+ .cb_barrier = NULL,
+ .fqs = rcu_bh_force_quiescent_state,
+ .stats = NULL,
+ .irq_capable = 1,
+ .name = "rcu_bh_expedited"
+};
+
/*
* Definitions for srcu torture testing.
*/
@@ -659,11 +651,6 @@ 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();
-}
-
static struct rcu_torture_ops sched_ops = {
.init = rcu_sync_torture_init,
.cleanup = NULL,
@@ -672,7 +659,7 @@ static struct rcu_torture_ops sched_ops = {
.readunlock = sched_torture_read_unlock,
.completed = rcu_no_completed,
.deferred_free = rcu_sched_torture_deferred_free,
- .sync = sched_torture_synchronize,
+ .sync = synchronize_sched,
.cb_barrier = rcu_barrier_sched,
.fqs = rcu_sched_force_quiescent_state,
.stats = NULL,
@@ -688,7 +675,7 @@ static struct rcu_torture_ops sched_sync_ops = {
.readunlock = sched_torture_read_unlock,
.completed = rcu_no_completed,
.deferred_free = rcu_sync_torture_deferred_free,
- .sync = sched_torture_synchronize,
+ .sync = synchronize_sched,
.cb_barrier = NULL,
.fqs = rcu_sched_force_quiescent_state,
.stats = NULL,
@@ -754,7 +741,7 @@ static int rcu_torture_boost(void *arg)
do {
/* Wait for the next test interval. */
oldstarttime = boost_starttime;
- while (jiffies - oldstarttime > ULONG_MAX / 2) {
+ while (ULONG_CMP_LT(jiffies, oldstarttime)) {
schedule_timeout_uninterruptible(1);
rcu_stutter_wait("rcu_torture_boost");
if (kthread_should_stop() ||
@@ -765,7 +752,7 @@ static int rcu_torture_boost(void *arg)
/* Do one boost-test interval. */
endtime = oldstarttime + test_boost_duration * HZ;
call_rcu_time = jiffies;
- while (jiffies - endtime > ULONG_MAX / 2) {
+ while (ULONG_CMP_LT(jiffies, endtime)) {
/* If we don't have a callback in flight, post one. */
if (!rbi.inflight) {
smp_mb(); /* RCU core before ->inflight = 1. */
@@ -792,7 +779,8 @@ static int rcu_torture_boost(void *arg)
* interval. Besides, we are running at RT priority,
* so delays should be relatively rare.
*/
- while (oldstarttime == boost_starttime) {
+ while (oldstarttime == boost_starttime &&
+ !kthread_should_stop()) {
if (mutex_trylock(&boost_mutex)) {
boost_starttime = jiffies +
test_boost_interval * HZ;
@@ -809,11 +797,11 @@ checkwait: rcu_stutter_wait("rcu_torture_boost");
/* Clean up and exit. */
VERBOSE_PRINTK_STRING("rcu_torture_boost task stopping");
- destroy_rcu_head_on_stack(&rbi.rcu);
rcutorture_shutdown_absorb("rcu_torture_boost");
while (!kthread_should_stop() || rbi.inflight)
schedule_timeout_uninterruptible(1);
smp_mb(); /* order accesses to ->inflight before stack-frame death. */
+ destroy_rcu_head_on_stack(&rbi.rcu);
return 0;
}
@@ -831,11 +819,13 @@ rcu_torture_fqs(void *arg)
VERBOSE_PRINTK_STRING("rcu_torture_fqs task started");
do {
fqs_resume_time = jiffies + fqs_stutter * HZ;
- while (jiffies - fqs_resume_time > LONG_MAX) {
+ while (ULONG_CMP_LT(jiffies, fqs_resume_time) &&
+ !kthread_should_stop()) {
schedule_timeout_interruptible(1);
}
fqs_burst_remaining = fqs_duration;
- while (fqs_burst_remaining > 0) {
+ while (fqs_burst_remaining > 0 &&
+ !kthread_should_stop()) {
cur_ops->fqs();
udelay(fqs_holdoff);
fqs_burst_remaining -= fqs_holdoff;
@@ -1280,8 +1270,9 @@ static int rcutorture_booster_init(int cpu)
/* Don't allow time recalculation while creating a new task. */
mutex_lock(&boost_mutex);
VERBOSE_PRINTK_STRING("Creating rcu_torture_boost task");
- boost_tasks[cpu] = kthread_create(rcu_torture_boost, NULL,
- "rcu_torture_boost");
+ boost_tasks[cpu] = kthread_create_on_node(rcu_torture_boost, NULL,
+ cpu_to_node(cpu),
+ "rcu_torture_boost");
if (IS_ERR(boost_tasks[cpu])) {
retval = PTR_ERR(boost_tasks[cpu]);
VERBOSE_PRINTK_STRING("rcu_torture_boost task create failed");
@@ -1424,7 +1415,7 @@ rcu_torture_init(void)
int firsterr = 0;
static struct rcu_torture_ops *torture_ops[] =
{ &rcu_ops, &rcu_sync_ops, &rcu_expedited_ops,
- &rcu_bh_ops, &rcu_bh_sync_ops,
+ &rcu_bh_ops, &rcu_bh_sync_ops, &rcu_bh_expedited_ops,
&srcu_ops, &srcu_expedited_ops,
&sched_ops, &sched_sync_ops, &sched_expedited_ops, };
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-16 09:37:07 +0000