void torture_shuffle_task_register(struct task_struct *tp);
int torture_shuffle_init(long shuffint);
-/* Shutdown task absorption, for when the tasks cannot safely be killed. */
+/* Test auto-shutdown handling. */
void torture_shutdown_absorb(const char *title);
+int torture_shutdown_init(int ssecs, void (*cleanup)(void));
+void torture_shutdown_cleanup(void);
/* Task stuttering, which forces load/no-load transitions. */
void stutter_wait(const char *title);
static struct task_struct *stats_task;
static struct task_struct *fqs_task;
static struct task_struct *boost_tasks[NR_CPUS];
-static struct task_struct *shutdown_task;
static struct task_struct *stall_task;
static struct task_struct **barrier_cbs_tasks;
static struct task_struct *barrier_task;
}
#endif /* #else #ifdef CONFIG_RCU_TRACE */
-static unsigned long shutdown_time; /* jiffies to system shutdown. */
static unsigned long boost_starttime; /* jiffies of next boost test start. */
DEFINE_MUTEX(boost_mutex); /* protect setting boost_starttime */
/* and boost task create/destroy. */
static wait_queue_head_t *barrier_cbs_wq; /* Coordinate barrier testing. */
static DECLARE_WAIT_QUEUE_HEAD(barrier_wq);
-/* Forward reference. */
-static void rcu_torture_cleanup(void);
-
/*
* Allocate an element from the rcu_tortures pool.
*/
return 0;
}
-/*
- * Cause the rcutorture test to shutdown the system after the test has
- * run for the time specified by the shutdown_secs module parameter.
- */
-static int
-rcu_torture_shutdown(void *arg)
-{
- long delta;
- unsigned long jiffies_snap;
-
- VERBOSE_TOROUT_STRING("rcu_torture_shutdown task started");
- jiffies_snap = ACCESS_ONCE(jiffies);
- while (ULONG_CMP_LT(jiffies_snap, shutdown_time) &&
- !kthread_should_stop()) {
- delta = shutdown_time - jiffies_snap;
- if (verbose)
- pr_alert("%s" TORTURE_FLAG
- "rcu_torture_shutdown task: %lu jiffies remaining\n",
- torture_type, delta);
- schedule_timeout_interruptible(delta);
- jiffies_snap = ACCESS_ONCE(jiffies);
- }
- if (kthread_should_stop()) {
- VERBOSE_TOROUT_STRING("rcu_torture_shutdown task stopping");
- return 0;
- }
-
- /* OK, shut down the system. */
-
- VERBOSE_TOROUT_STRING("rcu_torture_shutdown task shutting down system");
- shutdown_task = NULL; /* Avoid self-kill deadlock. */
- rcu_torture_cleanup(); /* Get the success/failure message. */
- kernel_power_off(); /* Shut down the system. */
- return 0;
-}
-
/*
* CPU-stall kthread. It waits as specified by stall_cpu_holdoff, then
* induces a CPU stall for the time specified by stall_cpu.
for_each_possible_cpu(i)
rcutorture_booster_cleanup(i);
}
- if (shutdown_task != NULL) {
- VERBOSE_TOROUT_STRING("Stopping rcu_torture_shutdown task");
- kthread_stop(shutdown_task);
- }
- shutdown_task = NULL;
+ torture_shutdown_cleanup();
/* Wait for all RCU callbacks to fire. */
}
}
}
- if (shutdown_secs > 0) {
- shutdown_time = jiffies + shutdown_secs * HZ;
- shutdown_task = kthread_create(rcu_torture_shutdown, NULL,
- "rcu_torture_shutdown");
- if (IS_ERR(shutdown_task)) {
- firsterr = PTR_ERR(shutdown_task);
- VERBOSE_TOROUT_ERRSTRING("Failed to create shutdown");
- shutdown_task = NULL;
- goto unwind;
- }
- torture_shuffle_task_register(shutdown_task);
- wake_up_process(shutdown_task);
+ i = torture_shutdown_init(shutdown_secs, rcu_torture_cleanup);
+ if (i != 0) {
+ firsterr = i;
+ goto unwind;
}
i = torture_onoff_init(onoff_holdoff * HZ, onoff_interval * HZ);
if (i != 0) {
}
EXPORT_SYMBOL_GPL(torture_shuffle_cleanup);
+/*
+ * Variables for auto-shutdown. This allows "lights out" torture runs
+ * to be fully scripted.
+ */
+static int shutdown_secs; /* desired test duration in seconds. */
+static struct task_struct *shutdown_task;
+static unsigned long shutdown_time; /* jiffies to system shutdown. */
+static void (*torture_shutdown_hook)(void);
+
/*
* Absorb kthreads into a kernel function that won't return, so that
* they won't ever access module text or data again.
}
EXPORT_SYMBOL_GPL(torture_shutdown_absorb);
+/*
+ * Cause the torture test to shutdown the system after the test has
+ * run for the time specified by the shutdown_secs parameter.
+ */
+static int torture_shutdown(void *arg)
+{
+ long delta;
+ unsigned long jiffies_snap;
+
+ VERBOSE_TOROUT_STRING("torture_shutdown task started");
+ jiffies_snap = jiffies;
+ while (ULONG_CMP_LT(jiffies_snap, shutdown_time) &&
+ !torture_must_stop()) {
+ delta = shutdown_time - jiffies_snap;
+ if (verbose)
+ pr_alert("%s" TORTURE_FLAG
+ "torture_shutdown task: %lu jiffies remaining\n",
+ torture_type, delta);
+ schedule_timeout_interruptible(delta);
+ jiffies_snap = jiffies;
+ }
+ if (torture_must_stop()) {
+ VERBOSE_TOROUT_STRING("torture_shutdown task stopping");
+ return 0;
+ }
+
+ /* OK, shut down the system. */
+
+ VERBOSE_TOROUT_STRING("torture_shutdown task shutting down system");
+ shutdown_task = NULL; /* Avoid self-kill deadlock. */
+ torture_shutdown_hook();/* Shut down the enclosing torture test. */
+ kernel_power_off(); /* Shut down the system. */
+ return 0;
+}
+
+/*
+ * Start up the shutdown task.
+ */
+int torture_shutdown_init(int ssecs, void (*cleanup)(void))
+{
+ int ret;
+
+ shutdown_secs = ssecs;
+ torture_shutdown_hook = cleanup;
+ if (shutdown_secs > 0) {
+ shutdown_time = jiffies + shutdown_secs * HZ;
+ shutdown_task = kthread_create(torture_shutdown, NULL,
+ "torture_shutdown");
+ if (IS_ERR(shutdown_task)) {
+ ret = PTR_ERR(shutdown_task);
+ VERBOSE_TOROUT_ERRSTRING("Failed to create shutdown");
+ shutdown_task = NULL;
+ return ret;
+ }
+ torture_shuffle_task_register(shutdown_task);
+ wake_up_process(shutdown_task);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(torture_shutdown_init);
+
+/*
+ * Shut down the shutdown task. Say what??? Heh! This can happen if
+ * the torture module gets an rmmod before the shutdown time arrives. ;-)
+ */
+void torture_shutdown_cleanup(void)
+{
+ if (shutdown_task != NULL) {
+ VERBOSE_TOROUT_STRING("Stopping torture_shutdown task");
+ kthread_stop(shutdown_task);
+ }
+ shutdown_task = NULL;
+}
+EXPORT_SYMBOL_GPL(torture_shutdown_cleanup);
+
/*
* Detect and respond to a system shutdown.
*/
projects / mirror_ubuntu-hirsute-kernel.git / commitdiff