diff options
Diffstat (limited to 'kernel/rcu/rcutorture.c')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 57 |
1 files changed, 18 insertions, 39 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 86fd8c11257b..a868758a6f9c 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -91,11 +91,15 @@ torture_param(int, test_boost_interval, 7, "Interval between boost tests, seconds."); torture_param(bool, test_no_idle_hz, true, "Test support for tickless idle CPUs"); -torture_param(bool, verbose, false, "Enable verbose debugging printk()s"); -static char *torture_type = "rcu"; +char *torture_type = "rcu"; +EXPORT_SYMBOL_GPL(torture_type); module_param(torture_type, charp, 0444); MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu, rcu_bh, ...)"); +bool verbose; +EXPORT_SYMBOL_GPL(verbose); +module_param(verbose, bool, 0444); +MODULE_PARM_DESC(verbose, "Enable verbose debugging printk()s"); static int nrealreaders; static struct task_struct *writer_task; @@ -200,17 +204,6 @@ static atomic_t barrier_cbs_invoked; /* Barrier callbacks invoked. */ static wait_queue_head_t *barrier_cbs_wq; /* Coordinate barrier testing. */ static DECLARE_WAIT_QUEUE_HEAD(barrier_wq); -/* Mediate rmmod and system shutdown. Concurrent rmmod & shutdown illegal! */ - -#define FULLSTOP_DONTSTOP 0 /* Normal operation. */ -#define FULLSTOP_SHUTDOWN 1 /* System shutdown with rcutorture running. */ -#define FULLSTOP_RMMOD 2 /* Normal rmmod of rcutorture. */ -static int fullstop = FULLSTOP_RMMOD; -/* - * Protect fullstop transitions and spawning of kthreads. - */ -static DEFINE_MUTEX(fullstop_mutex); - /* Forward reference. */ static void rcu_torture_cleanup(void); @@ -232,20 +225,6 @@ rcutorture_shutdown_notify(struct notifier_block *unused1, } /* - * Absorb kthreads into a kernel function that won't return, so that - * they won't ever access module text or data again. - */ -static void rcutorture_shutdown_absorb(const char *title) -{ - if (ACCESS_ONCE(fullstop) == FULLSTOP_SHUTDOWN) { - pr_notice( - "rcutorture thread %s parking due to system shutdown\n", - title); - schedule_timeout_uninterruptible(MAX_SCHEDULE_TIMEOUT); - } -} - -/* * Allocate an element from the rcu_tortures pool. */ static struct rcu_torture * @@ -286,7 +265,7 @@ rcu_stutter_wait(const char *title) schedule_timeout_interruptible(1); else schedule_timeout_interruptible(round_jiffies_relative(HZ)); - rcutorture_shutdown_absorb(title); + torture_shutdown_absorb(title); } } @@ -681,7 +660,7 @@ checkwait: rcu_stutter_wait("rcu_torture_boost"); /* Clean up and exit. */ VERBOSE_TOROUT_STRING("rcu_torture_boost task stopping"); - rcutorture_shutdown_absorb("rcu_torture_boost"); + torture_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. */ @@ -717,7 +696,7 @@ rcu_torture_fqs(void *arg) rcu_stutter_wait("rcu_torture_fqs"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_TOROUT_STRING("rcu_torture_fqs task stopping"); - rcutorture_shutdown_absorb("rcu_torture_fqs"); + torture_shutdown_absorb("rcu_torture_fqs"); while (!kthread_should_stop()) schedule_timeout_uninterruptible(1); return 0; @@ -789,7 +768,7 @@ rcu_torture_writer(void *arg) rcu_stutter_wait("rcu_torture_writer"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_TOROUT_STRING("rcu_torture_writer task stopping"); - rcutorture_shutdown_absorb("rcu_torture_writer"); + torture_shutdown_absorb("rcu_torture_writer"); while (!kthread_should_stop()) schedule_timeout_uninterruptible(1); return 0; @@ -827,7 +806,7 @@ rcu_torture_fakewriter(void *arg) } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_TOROUT_STRING("rcu_torture_fakewriter task stopping"); - rcutorture_shutdown_absorb("rcu_torture_fakewriter"); + torture_shutdown_absorb("rcu_torture_fakewriter"); while (!kthread_should_stop()) schedule_timeout_uninterruptible(1); return 0; @@ -971,7 +950,7 @@ rcu_torture_reader(void *arg) rcu_stutter_wait("rcu_torture_reader"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_TOROUT_STRING("rcu_torture_reader task stopping"); - rcutorture_shutdown_absorb("rcu_torture_reader"); + torture_shutdown_absorb("rcu_torture_reader"); if (irqreader && cur_ops->irq_capable) del_timer_sync(&t); while (!kthread_should_stop()) @@ -1095,7 +1074,7 @@ rcu_torture_stats(void *arg) do { schedule_timeout_interruptible(stat_interval * HZ); rcu_torture_stats_print(); - rcutorture_shutdown_absorb("rcu_torture_stats"); + torture_shutdown_absorb("rcu_torture_stats"); } while (!kthread_should_stop()); VERBOSE_TOROUT_STRING("rcu_torture_stats task stopping"); return 0; @@ -1179,7 +1158,7 @@ rcu_torture_shuffle(void *arg) do { schedule_timeout_interruptible(shuffle_interval * HZ); rcu_torture_shuffle_tasks(); - rcutorture_shutdown_absorb("rcu_torture_shuffle"); + torture_shutdown_absorb("rcu_torture_shuffle"); } while (!kthread_should_stop()); VERBOSE_TOROUT_STRING("rcu_torture_shuffle task stopping"); return 0; @@ -1198,7 +1177,7 @@ rcu_torture_stutter(void *arg) if (!kthread_should_stop()) schedule_timeout_interruptible(stutter * HZ); stutter_pause_test = 0; - rcutorture_shutdown_absorb("rcu_torture_stutter"); + torture_shutdown_absorb("rcu_torture_stutter"); } while (!kthread_should_stop()); VERBOSE_TOROUT_STRING("rcu_torture_stutter task stopping"); return 0; @@ -1470,7 +1449,7 @@ static int rcu_torture_stall(void *args) rcu_read_unlock(); pr_alert("rcu_torture_stall end.\n"); } - rcutorture_shutdown_absorb("rcu_torture_stall"); + torture_shutdown_absorb("rcu_torture_stall"); while (!kthread_should_stop()) schedule_timeout_interruptible(10 * HZ); return 0; @@ -1534,7 +1513,7 @@ static int rcu_torture_barrier_cbs(void *arg) wake_up(&barrier_wq); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_TOROUT_STRING("rcu_torture_barrier_cbs task stopping"); - rcutorture_shutdown_absorb("rcu_torture_barrier_cbs"); + torture_shutdown_absorb("rcu_torture_barrier_cbs"); while (!kthread_should_stop()) schedule_timeout_interruptible(1); cur_ops->cb_barrier(); @@ -1571,7 +1550,7 @@ static int rcu_torture_barrier(void *arg) schedule_timeout_interruptible(HZ / 10); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_TOROUT_STRING("rcu_torture_barrier task stopping"); - rcutorture_shutdown_absorb("rcu_torture_barrier"); + torture_shutdown_absorb("rcu_torture_barrier"); while (!kthread_should_stop()) schedule_timeout_interruptible(1); return 0; |