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rcutorture: Stop generic kthreads in torture_cleanup()

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The specific torture modules (like rcutorture) need to call
torture_cleanup() in any case, so this commit makes torture_cleanup()
deal with torture_shutdown_cleanup() and torture_stutter_cleanup() so
that the specific modules don't have to deal with these details.

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 2014-02-04 12:35:27 -08:00
parent 9c029b8609
commit bfefc73aa1
3 changed files with 19 additions and 27 deletions
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2
include/linux/torture.h
View File

@ -75,12 +75,10 @@ int torture_shuffle_init(long shuffint);
/* 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);
int torture_stutter_init(int s);
void torture_stutter_cleanup(void);
/* Initialization and cleanup. */
void torture_init_begin(char *ttype, bool v, int *runnable);

7
kernel/rcu/rcutorture.c
View File

@ -53,11 +53,6 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Paul E. McKenney <paulmck@us.ibm.com> and Josh Triplett <josh@freedesktop.org>");
MODULE_ALIAS("rcutorture");
#ifdef MODULE_PARAM_PREFIX
#undef MODULE_PARAM_PREFIX
#endif
#define MODULE_PARAM_PREFIX "rcutorture."
torture_param(int, fqs_duration, 0,
"Duration of fqs bursts (us), 0 to disable");
@ -1269,7 +1264,6 @@ rcu_torture_cleanup(void)
rcu_torture_barrier_cleanup();
torture_stop_kthread(rcu_torture_stall, stall_task);
torture_stutter_cleanup();
torture_stop_kthread(rcu_torture_writer, writer_task);
if (reader_tasks) {
@ -1297,7 +1291,6 @@ rcu_torture_cleanup(void)
for_each_possible_cpu(i)
rcutorture_booster_cleanup(i);
}
torture_shutdown_cleanup();
/* Wait for all RCU callbacks to fire. */

37
kernel/torture.c
View File

@ -477,20 +477,6 @@ int torture_shutdown_init(int ssecs, void (*cleanup)(void))
}
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.
*/
@ -512,6 +498,20 @@ static struct notifier_block torture_shutdown_nb = {
.notifier_call = torture_shutdown_notify,
};
/*
* Shut down the shutdown task. Say what??? Heh! This can happen if
* the torture module gets an rmmod before the shutdown time arrives. ;-)
*/
static void torture_shutdown_cleanup(void)
{
unregister_reboot_notifier(&torture_shutdown_nb);
if (shutdown_task != NULL) {
VERBOSE_TOROUT_STRING("Stopping torture_shutdown task");
kthread_stop(shutdown_task);
}
shutdown_task = NULL;
}
/*
* Variables for stuttering, which means to periodically pause and
* restart testing in order to catch bugs that appear when load is
@ -575,7 +575,7 @@ EXPORT_SYMBOL_GPL(torture_stutter_init);
/*
* Cleanup after the torture_stutter kthread.
*/
void torture_stutter_cleanup(void)
static void torture_stutter_cleanup(void)
{
if (!stutter_task)
return;
@ -583,7 +583,6 @@ void torture_stutter_cleanup(void)
kthread_stop(stutter_task);
stutter_task = NULL;
}
EXPORT_SYMBOL_GPL(torture_stutter_cleanup);
/*
* Initialize torture module. Please note that this is -not- invoked via
@ -619,7 +618,8 @@ 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.
* is detected, otherwise, all kthreads started by functions in this file
* will be shut down.
*
* This must be called before the caller starts shutting down its own
* kthreads.
@ -635,8 +635,9 @@ bool torture_cleanup(void)
}
ACCESS_ONCE(fullstop) = FULLSTOP_RMMOD;
mutex_unlock(&fullstop_mutex);
unregister_reboot_notifier(&torture_shutdown_nb);
torture_shutdown_cleanup();
torture_shuffle_cleanup();
torture_stutter_cleanup();
torture_onoff_cleanup();
return false;
}