diff --git a/kernel/torture.c b/kernel/torture.c index 1a0519b836ac9cacfa1dbed28f41b863dc5d5555..8be83fdc6be1aedda6d8a4645c161bd1d8fec143 100644 --- a/kernel/torture.c +++ b/kernel/torture.c @@ -54,6 +54,9 @@ module_param(verbose_sleep_frequency, int, 0444); static int verbose_sleep_duration = 1; module_param(verbose_sleep_duration, int, 0444); +static int random_shuffle; +module_param(random_shuffle, int, 0444); + static char *torture_type; static int verbose; @@ -518,6 +521,7 @@ static void torture_shuffle_task_unregister_all(void) */ static void torture_shuffle_tasks(void) { + DEFINE_TORTURE_RANDOM(rand); struct shuffle_task *stp; cpumask_setall(shuffle_tmp_mask); @@ -537,8 +541,10 @@ static void torture_shuffle_tasks(void) cpumask_clear_cpu(shuffle_idle_cpu, shuffle_tmp_mask); mutex_lock(&shuffle_task_mutex); - list_for_each_entry(stp, &shuffle_task_list, st_l) - set_cpus_allowed_ptr(stp->st_t, shuffle_tmp_mask); + list_for_each_entry(stp, &shuffle_task_list, st_l) { + if (!random_shuffle || torture_random(&rand) & 0x1) + set_cpus_allowed_ptr(stp->st_t, shuffle_tmp_mask); + } mutex_unlock(&shuffle_task_mutex); cpus_read_unlock();