diff options
Diffstat (limited to 'kernel/rcu/rcuscale.c')
| -rw-r--r-- | kernel/rcu/rcuscale.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c index 06491d5530db..dca51fe9c73f 100644 --- a/kernel/rcu/rcuscale.c +++ b/kernel/rcu/rcuscale.c @@ -625,6 +625,8 @@ rcu_scale_shutdown(void *arg) torture_param(int, kfree_nthreads, -1, "Number of threads running loops of kfree_rcu()."); torture_param(int, kfree_alloc_num, 8000, "Number of allocations and frees done in an iteration."); torture_param(int, kfree_loops, 10, "Number of loops doing kfree_alloc_num allocations and frees."); +torture_param(bool, kfree_rcu_test_double, false, "Do we run a kfree_rcu() double-argument scale test?"); +torture_param(bool, kfree_rcu_test_single, false, "Do we run a kfree_rcu() single-argument scale test?"); static struct task_struct **kfree_reader_tasks; static int kfree_nrealthreads; @@ -644,10 +646,13 @@ kfree_scale_thread(void *arg) struct kfree_obj *alloc_ptr; u64 start_time, end_time; long long mem_begin, mem_during = 0; + bool kfree_rcu_test_both; + DEFINE_TORTURE_RANDOM(tr); VERBOSE_SCALEOUT_STRING("kfree_scale_thread task started"); set_cpus_allowed_ptr(current, cpumask_of(me % nr_cpu_ids)); set_user_nice(current, MAX_NICE); + kfree_rcu_test_both = (kfree_rcu_test_single == kfree_rcu_test_double); start_time = ktime_get_mono_fast_ns(); @@ -670,7 +675,15 @@ kfree_scale_thread(void *arg) if (!alloc_ptr) return -ENOMEM; - kfree_rcu(alloc_ptr, rh); + // By default kfree_rcu_test_single and kfree_rcu_test_double are + // initialized to false. If both have the same value (false or true) + // both are randomly tested, otherwise only the one with value true + // is tested. + if ((kfree_rcu_test_single && !kfree_rcu_test_double) || + (kfree_rcu_test_both && torture_random(&tr) & 0x800)) + kfree_rcu(alloc_ptr); + else + kfree_rcu(alloc_ptr, rh); } cond_resched(); |