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rcutorture: Abstract torture-test cleanup

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This commit creates a torture_cleanup() that handles the generic
cleanup actions local to kernel/torture.c.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Paul E. McKenney 2014-01-30 14:21:11 -08:00
parent b5daa8f3b3
commit cc47ae0830
3 changed files with 30 additions and 15 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
include/linux/torture.h
View file

@ -65,7 +65,6 @@ extern struct mutex fullstop_mutex;
/* Definitions for online/offline exerciser. */
int torture_onoff_init(long ooholdoff, long oointerval);
void torture_onoff_cleanup(void);
char *torture_onoff_stats(char *page);
bool torture_onoff_failures(void);
@ -80,14 +79,13 @@ unsigned long torture_random(struct torture_random_state *trsp);
/* Task shuffler, which causes CPUs to occasionally go idle. */
void torture_shuffle_task_register(struct task_struct *tp);
int torture_shuffle_init(long shuffint);
void torture_shuffle_cleanup(void);
/* Shutdown task absorption, for when the tasks cannot safely be killed. */
void torture_shutdown_absorb(const char *title);
/* Initialization and cleanup. */
void torture_init_begin(char *ttype, bool v);
void torture_init_end(void);
bool torture_cleanup(void);
#endif /* __LINUX_TORTURE_H */

11
kernel/rcu/rcutorture.c
View file

@ -1423,21 +1423,13 @@ rcu_torture_cleanup(void)
int i;
rcutorture_record_test_transition();
mutex_lock(&fullstop_mutex);
if (fullstop == FULLSTOP_SHUTDOWN) {
pr_warn(/* but going down anyway, so... */
"Concurrent 'rmmod rcutorture' and shutdown illegal!\n");
mutex_unlock(&fullstop_mutex);
schedule_timeout_uninterruptible(10);
if (torture_cleanup()) {
if (cur_ops->cb_barrier != NULL)
cur_ops->cb_barrier();
return;
}
fullstop = FULLSTOP_RMMOD;
mutex_unlock(&fullstop_mutex);
unregister_reboot_notifier(&rcutorture_shutdown_nb);
torture_shuffle_cleanup(); /* Must be first task cleaned up. */
rcu_torture_barrier_cleanup();
rcu_torture_stall_cleanup();
if (stutter_task) {
@ -1501,7 +1493,6 @@ rcu_torture_cleanup(void)
kthread_stop(shutdown_task);
}
shutdown_task = NULL;
torture_onoff_cleanup();
/* Wait for all RCU callbacks to fire. */

30
kernel/torture.c
View file

@ -199,7 +199,7 @@ EXPORT_SYMBOL_GPL(torture_onoff_init);
/*
* Clean up after online/offline testing.
*/
void torture_onoff_cleanup(void)
static void torture_onoff_cleanup(void)
{
#ifdef CONFIG_HOTPLUG_CPU
if (onoff_task == NULL)
@ -403,7 +403,7 @@ EXPORT_SYMBOL_GPL(torture_shuffle_init);
/*
* Stop the shuffling.
*/
void torture_shuffle_cleanup(void)
static void torture_shuffle_cleanup(void)
{
torture_shuffle_task_unregister_all();
if (shuffler_task) {
@ -453,3 +453,29 @@ void __init torture_init_end(void)
mutex_unlock(&fullstop_mutex);
}
EXPORT_SYMBOL_GPL(torture_init_end);
/*
* Clean up torture module. Please note that this is -not- invoked via
* the usual module_exit() mechanism, but rather by an explicit call from
* the client torture module. Returns true if a race with system shutdown
* is detected.
*
* This must be called before the caller starts shutting down its own
* kthreads.
*/
bool torture_cleanup(void)
{
mutex_lock(&fullstop_mutex);
if (fullstop == FULLSTOP_SHUTDOWN) {
pr_warn("Concurrent rmmod and shutdown illegal!\n");
mutex_unlock(&fullstop_mutex);
schedule_timeout_uninterruptible(10);
return true;
}
fullstop = FULLSTOP_RMMOD;
mutex_unlock(&fullstop_mutex);
torture_shuffle_cleanup();
torture_onoff_cleanup();
return false;
}
EXPORT_SYMBOL_GPL(torture_cleanup);