diff options
Diffstat (limited to 'kernel/rcutorture.c')
| -rw-r--r-- | kernel/rcutorture.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index 9b58f1eff3c..88c28d47655 100644 --- a/kernel/rcutorture.c +++ b/kernel/rcutorture.c @@ -80,6 +80,7 @@ struct rcu_torture { struct rcu_head rtort_rcu; int rtort_pipe_count; struct list_head rtort_free; + int rtort_mbtest; }; static int fullstop = 0; /* stop generating callbacks at test end. */ @@ -96,6 +97,8 @@ static atomic_t rcu_torture_wcount[RCU_TORTURE_PIPE_LEN + 1]; atomic_t n_rcu_torture_alloc; atomic_t n_rcu_torture_alloc_fail; atomic_t n_rcu_torture_free; +atomic_t n_rcu_torture_mberror; +atomic_t n_rcu_torture_error; /* * Allocate an element from the rcu_tortures pool. @@ -145,9 +148,10 @@ rcu_torture_cb(struct rcu_head *p) if (i > RCU_TORTURE_PIPE_LEN) i = RCU_TORTURE_PIPE_LEN; atomic_inc(&rcu_torture_wcount[i]); - if (++rp->rtort_pipe_count >= RCU_TORTURE_PIPE_LEN) + if (++rp->rtort_pipe_count >= RCU_TORTURE_PIPE_LEN) { + rp->rtort_mbtest = 0; rcu_torture_free(rp); - else + } else call_rcu(p, rcu_torture_cb); } @@ -195,6 +199,8 @@ rcu_torture_writer(void *arg) static DEFINE_RCU_RANDOM(rand); VERBOSE_PRINTK_STRING("rcu_torture_writer task started"); + set_user_nice(current, 19); + do { schedule_timeout_uninterruptible(1); if (rcu_batches_completed() == oldbatch) @@ -204,6 +210,7 @@ rcu_torture_writer(void *arg) rp->rtort_pipe_count = 0; udelay(rcu_random(&rand) & 0x3ff); old_rp = rcu_torture_current; + rp->rtort_mbtest = 1; rcu_assign_pointer(rcu_torture_current, rp); smp_wmb(); if (old_rp != NULL) { @@ -238,6 +245,8 @@ rcu_torture_reader(void *arg) int pipe_count; VERBOSE_PRINTK_STRING("rcu_torture_reader task started"); + set_user_nice(current, 19); + do { rcu_read_lock(); completed = rcu_batches_completed(); @@ -248,6 +257,8 @@ rcu_torture_reader(void *arg) schedule_timeout_interruptible(HZ); continue; } + if (p->rtort_mbtest == 0) + atomic_inc(&n_rcu_torture_mberror); udelay(rcu_random(&rand) & 0x7f); preempt_disable(); pipe_count = p->rtort_pipe_count; @@ -296,16 +307,22 @@ rcu_torture_printk(char *page) } cnt += sprintf(&page[cnt], "rcutorture: "); cnt += sprintf(&page[cnt], - "rtc: %p ver: %ld tfle: %d rta: %d rtaf: %d rtf: %d", + "rtc: %p ver: %ld tfle: %d rta: %d rtaf: %d rtf: %d " + "rtmbe: %d", rcu_torture_current, rcu_torture_current_version, list_empty(&rcu_torture_freelist), atomic_read(&n_rcu_torture_alloc), atomic_read(&n_rcu_torture_alloc_fail), - atomic_read(&n_rcu_torture_free)); + atomic_read(&n_rcu_torture_free), + atomic_read(&n_rcu_torture_mberror)); + if (atomic_read(&n_rcu_torture_mberror) != 0) + cnt += sprintf(&page[cnt], " !!!"); cnt += sprintf(&page[cnt], "\nrcutorture: "); - if (i > 1) + if (i > 1) { cnt += sprintf(&page[cnt], "!!! "); + atomic_inc(&n_rcu_torture_error); + } cnt += sprintf(&page[cnt], "Reader Pipe: "); for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) cnt += sprintf(&page[cnt], " %ld", pipesummary[i]); @@ -396,7 +413,9 @@ rcu_torture_cleanup(void) for (i = 0; i < RCU_TORTURE_PIPE_LEN; i++) synchronize_rcu(); rcu_torture_stats_print(); /* -After- the stats thread is stopped! */ - PRINTK_STRING("--- End of test"); + printk(KERN_ALERT TORTURE_FLAG + "--- End of test: %s\n", + atomic_read(&n_rcu_torture_error) == 0 ? "SUCCESS" : "FAILURE"); } static int @@ -421,6 +440,7 @@ rcu_torture_init(void) INIT_LIST_HEAD(&rcu_torture_freelist); for (i = 0; i < sizeof(rcu_tortures) / sizeof(rcu_tortures[0]); i++) { + rcu_tortures[i].rtort_mbtest = 0; list_add_tail(&rcu_tortures[i].rtort_free, &rcu_torture_freelist); } @@ -432,6 +452,8 @@ rcu_torture_init(void) atomic_set(&n_rcu_torture_alloc, 0); atomic_set(&n_rcu_torture_alloc_fail, 0); atomic_set(&n_rcu_torture_free, 0); + atomic_set(&n_rcu_torture_mberror, 0); + atomic_set(&n_rcu_torture_error, 0); for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) atomic_set(&rcu_torture_wcount[i], 0); for_each_cpu(cpu) { |