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rcu: Add synchronize_sched_expedited() torture tests

Browse source 
This patch adds rcutorture tests for the new
synchronize_sched_expedited() primitive, and also does some
whitespace cleanups in kernel/rcutorture.c as well.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: akpm@linux-foundation.org
Cc: torvalds@linux-foundation.org
Cc: davem@davemloft.net
Cc: dada1@cosmosbay.com
Cc: zbr@ioremap.net
Cc: jeff.chua.linux@gmail.com
Cc: paulus@samba.org
Cc: laijs@cn.fujitsu.com
Cc: jengelh@medozas.de
Cc: r000n@r000n.net
Cc: benh@kernel.crashing.org
Cc: mathieu.desnoyers@polymtl.ca
LKML-Reference: <12459460981342-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Paul E. McKenney 2009-06-25 09:08:17 -07:00 committed by Ingo Molnar
parent 03b042bf1d
commit 0acc512cb1
1 changed files with 110 additions and 92 deletions
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76
kernel/rcutorture.c
View file

@ -257,14 +257,14 @@ struct rcu_torture_ops {
void (*init)(void); void (*init)(void);
void (*cleanup)(void); void (*cleanup)(void);
int (*readlock)(void); int (*readlock)(void);
void (*readdelay)(struct rcu_random_state *rrsp); void (*read_delay)(struct rcu_random_state *rrsp);
void (*readunlock)(int idx); void (*readunlock)(int idx);
int (*completed)(void); int (*completed)(void);
void (*deferredfree)(struct rcu_torture *p); void (*deferred_free)(struct rcu_torture *p);
void (*sync)(void); void (*sync)(void);
void (*cb_barrier)(void); void (*cb_barrier)(void);
int (*stats)(char *page); int (*stats)(char *page);
int irqcapable; int irq_capable;
char *name; char *name;
}; };
static struct rcu_torture_ops *cur_ops = NULL; static struct rcu_torture_ops *cur_ops = NULL;
@ -320,7 +320,7 @@ rcu_torture_cb(struct rcu_head *p)
rp->rtort_mbtest = 0; rp->rtort_mbtest = 0;
rcu_torture_free(rp); rcu_torture_free(rp);
} else } else
cur_ops->deferredfree(rp); cur_ops->deferred_free(rp);
} }
static void rcu_torture_deferred_free(struct rcu_torture *p) static void rcu_torture_deferred_free(struct rcu_torture *p)
@ -332,14 +332,14 @@ static struct rcu_torture_ops rcu_ops = {
.init = NULL, .init = NULL,
.cleanup = NULL, .cleanup = NULL,
.readlock = rcu_torture_read_lock, .readlock = rcu_torture_read_lock,
.readdelay = rcu_read_delay, .read_delay = rcu_read_delay,
.readunlock = rcu_torture_read_unlock, .readunlock = rcu_torture_read_unlock,
.completed = rcu_torture_completed, .completed = rcu_torture_completed,
.deferredfree = rcu_torture_deferred_free, .deferred_free = rcu_torture_deferred_free,
.sync = synchronize_rcu, .sync = synchronize_rcu,
.cb_barrier = rcu_barrier, .cb_barrier = rcu_barrier,
.stats = NULL, .stats = NULL,
.irqcapable = 1, .irq_capable = 1,
.name = "rcu" .name = "rcu"
}; };
@ -373,14 +373,14 @@ static struct rcu_torture_ops rcu_sync_ops = {
.init = rcu_sync_torture_init, .init = rcu_sync_torture_init,
.cleanup = NULL, .cleanup = NULL,
.readlock = rcu_torture_read_lock, .readlock = rcu_torture_read_lock,
.readdelay = rcu_read_delay, .read_delay = rcu_read_delay,
.readunlock = rcu_torture_read_unlock, .readunlock = rcu_torture_read_unlock,
.completed = rcu_torture_completed, .completed = rcu_torture_completed,
.deferredfree = rcu_sync_torture_deferred_free, .deferred_free = rcu_sync_torture_deferred_free,
.sync = synchronize_rcu, .sync = synchronize_rcu,
.cb_barrier = NULL, .cb_barrier = NULL,
.stats = NULL, .stats = NULL,
.irqcapable = 1, .irq_capable = 1,
.name = "rcu_sync" .name = "rcu_sync"
}; };
@ -435,14 +435,14 @@ static struct rcu_torture_ops rcu_bh_ops = {
.init = NULL, .init = NULL,
.cleanup = NULL, .cleanup = NULL,
.readlock = rcu_bh_torture_read_lock, .readlock = rcu_bh_torture_read_lock,
.readdelay = rcu_read_delay, /* just reuse rcu's version. */ .read_delay = rcu_read_delay, /* just reuse rcu's version. */
.readunlock = rcu_bh_torture_read_unlock, .readunlock = rcu_bh_torture_read_unlock,
.completed = rcu_bh_torture_completed, .completed = rcu_bh_torture_completed,
.deferredfree = rcu_bh_torture_deferred_free, .deferred_free = rcu_bh_torture_deferred_free,
.sync = rcu_bh_torture_synchronize, .sync = rcu_bh_torture_synchronize,
.cb_barrier = rcu_barrier_bh, .cb_barrier = rcu_barrier_bh,
.stats = NULL, .stats = NULL,
.irqcapable = 1, .irq_capable = 1,
.name = "rcu_bh" .name = "rcu_bh"
}; };
@ -450,14 +450,14 @@ static struct rcu_torture_ops rcu_bh_sync_ops = {
.init = rcu_sync_torture_init, .init = rcu_sync_torture_init,
.cleanup = NULL, .cleanup = NULL,
.readlock = rcu_bh_torture_read_lock, .readlock = rcu_bh_torture_read_lock,
.readdelay = rcu_read_delay, /* just reuse rcu's version. */ .read_delay = rcu_read_delay, /* just reuse rcu's version. */
.readunlock = rcu_bh_torture_read_unlock, .readunlock = rcu_bh_torture_read_unlock,
.completed = rcu_bh_torture_completed, .completed = rcu_bh_torture_completed,
.deferredfree = rcu_sync_torture_deferred_free, .deferred_free = rcu_sync_torture_deferred_free,
.sync = rcu_bh_torture_synchronize, .sync = rcu_bh_torture_synchronize,
.cb_barrier = NULL, .cb_barrier = NULL,
.stats = NULL, .stats = NULL,
.irqcapable = 1, .irq_capable = 1,
.name = "rcu_bh_sync" .name = "rcu_bh_sync"
}; };
@ -533,10 +533,10 @@ static struct rcu_torture_ops srcu_ops = {
.init = srcu_torture_init, .init = srcu_torture_init,
.cleanup = srcu_torture_cleanup, .cleanup = srcu_torture_cleanup,
.readlock = srcu_torture_read_lock, .readlock = srcu_torture_read_lock,
.readdelay = srcu_read_delay, .read_delay = srcu_read_delay,
.readunlock = srcu_torture_read_unlock, .readunlock = srcu_torture_read_unlock,
.completed = srcu_torture_completed, .completed = srcu_torture_completed,
.deferredfree = rcu_sync_torture_deferred_free, .deferred_free = rcu_sync_torture_deferred_free,
.sync = srcu_torture_synchronize, .sync = srcu_torture_synchronize,
.cb_barrier = NULL, .cb_barrier = NULL,
.stats = srcu_torture_stats, .stats = srcu_torture_stats,
@ -577,14 +577,14 @@ static struct rcu_torture_ops sched_ops = {
.init = rcu_sync_torture_init, .init = rcu_sync_torture_init,
.cleanup = NULL, .cleanup = NULL,
.readlock = sched_torture_read_lock, .readlock = sched_torture_read_lock,
.readdelay = rcu_read_delay, /* just reuse rcu's version. */ .read_delay = rcu_read_delay, /* just reuse rcu's version. */
.readunlock = sched_torture_read_unlock, .readunlock = sched_torture_read_unlock,
.completed = sched_torture_completed, .completed = sched_torture_completed,
.deferredfree = rcu_sched_torture_deferred_free, .deferred_free = rcu_sched_torture_deferred_free,
.sync = sched_torture_synchronize, .sync = sched_torture_synchronize,
.cb_barrier = rcu_barrier_sched, .cb_barrier = rcu_barrier_sched,
.stats = NULL, .stats = NULL,
.irqcapable = 1, .irq_capable = 1,
.name = "sched" .name = "sched"
}; };
@ -592,16 +592,33 @@ static struct rcu_torture_ops sched_ops_sync = {
.init = rcu_sync_torture_init, .init = rcu_sync_torture_init,
.cleanup = NULL, .cleanup = NULL,
.readlock = sched_torture_read_lock, .readlock = sched_torture_read_lock,
.readdelay = rcu_read_delay, /* just reuse rcu's version. */ .read_delay = rcu_read_delay, /* just reuse rcu's version. */
.readunlock = sched_torture_read_unlock, .readunlock = sched_torture_read_unlock,
.completed = sched_torture_completed, .completed = sched_torture_completed,
.deferredfree = rcu_sync_torture_deferred_free, .deferred_free = rcu_sync_torture_deferred_free,
.sync = sched_torture_synchronize, .sync = sched_torture_synchronize,
.cb_barrier = NULL, .cb_barrier = NULL,
.stats = NULL, .stats = NULL,
.name = "sched_sync" .name = "sched_sync"
}; };
extern int rcu_expedited_torture_stats(char *page);
static struct rcu_torture_ops sched_expedited_ops = {
.init = rcu_sync_torture_init,
.cleanup = NULL,
.readlock = sched_torture_read_lock,
.read_delay = rcu_read_delay, /* just reuse rcu's version. */
.readunlock = sched_torture_read_unlock,
.completed = sched_torture_completed,
.deferred_free = rcu_sync_torture_deferred_free,
.sync = synchronize_sched_expedited,
.cb_barrier = NULL,
.stats = rcu_expedited_torture_stats,
.irq_capable = 1,
.name = "sched_expedited"
};
/* /*
* RCU torture writer kthread. Repeatedly substitutes a new structure * RCU torture writer kthread. Repeatedly substitutes a new structure
* for that pointed to by rcu_torture_current, freeing the old structure * for that pointed to by rcu_torture_current, freeing the old structure
@ -635,7 +652,7 @@ rcu_torture_writer(void *arg)
i = RCU_TORTURE_PIPE_LEN; i = RCU_TORTURE_PIPE_LEN;
atomic_inc(&rcu_torture_wcount[i]); atomic_inc(&rcu_torture_wcount[i]);
old_rp->rtort_pipe_count++; old_rp->rtort_pipe_count++;
cur_ops->deferredfree(old_rp); cur_ops->deferred_free(old_rp);
} }
rcu_torture_current_version++; rcu_torture_current_version++;
oldbatch = cur_ops->completed(); oldbatch = cur_ops->completed();
@ -700,7 +717,7 @@ static void rcu_torture_timer(unsigned long unused)
if (p->rtort_mbtest == 0) if (p->rtort_mbtest == 0)
atomic_inc(&n_rcu_torture_mberror); atomic_inc(&n_rcu_torture_mberror);
spin_lock(&rand_lock); spin_lock(&rand_lock);
cur_ops->readdelay(&rand); cur_ops->read_delay(&rand);
n_rcu_torture_timers++; n_rcu_torture_timers++;
spin_unlock(&rand_lock); spin_unlock(&rand_lock);
preempt_disable(); preempt_disable();
@ -738,11 +755,11 @@ rcu_torture_reader(void *arg)
VERBOSE_PRINTK_STRING("rcu_torture_reader task started"); VERBOSE_PRINTK_STRING("rcu_torture_reader task started");
set_user_nice(current, 19); set_user_nice(current, 19);
if (irqreader && cur_ops->irqcapable) if (irqreader && cur_ops->irq_capable)
setup_timer_on_stack(&t, rcu_torture_timer, 0); setup_timer_on_stack(&t, rcu_torture_timer, 0);
do { do {
if (irqreader && cur_ops->irqcapable) { if (irqreader && cur_ops->irq_capable) {
if (!timer_pending(&t)) if (!timer_pending(&t))
mod_timer(&t, 1); mod_timer(&t, 1);
} }
@ -757,7 +774,7 @@ rcu_torture_reader(void *arg)
} }
if (p->rtort_mbtest == 0) if (p->rtort_mbtest == 0)
atomic_inc(&n_rcu_torture_mberror); atomic_inc(&n_rcu_torture_mberror);
cur_ops->readdelay(&rand); cur_ops->read_delay(&rand);
preempt_disable(); preempt_disable();
pipe_count = p->rtort_pipe_count; pipe_count = p->rtort_pipe_count;
if (pipe_count > RCU_TORTURE_PIPE_LEN) { if (pipe_count > RCU_TORTURE_PIPE_LEN) {
@ -778,7 +795,7 @@ rcu_torture_reader(void *arg)
} while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
VERBOSE_PRINTK_STRING("rcu_torture_reader task stopping"); VERBOSE_PRINTK_STRING("rcu_torture_reader task stopping");
rcutorture_shutdown_absorb("rcu_torture_reader"); rcutorture_shutdown_absorb("rcu_torture_reader");
if (irqreader && cur_ops->irqcapable) if (irqreader && cur_ops->irq_capable)
del_timer_sync(&t); del_timer_sync(&t);
while (!kthread_should_stop()) while (!kthread_should_stop())
schedule_timeout_uninterruptible(1); schedule_timeout_uninterruptible(1);
@ -1078,6 +1095,7 @@ rcu_torture_init(void)
int firsterr = 0; int firsterr = 0;
static struct rcu_torture_ops *torture_ops[] = static struct rcu_torture_ops *torture_ops[] =
{ &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops, { &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops,
&sched_expedited_ops,
&srcu_ops, &sched_ops, &sched_ops_sync, }; &srcu_ops, &sched_ops, &sched_ops_sync, };
mutex_lock(&fullstop_mutex); mutex_lock(&fullstop_mutex);