summaryrefslogtreecommitdiff
path: root/kernel/rcu/rcuscale.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/rcu/rcuscale.c')
-rw-r--r--kernel/rcu/rcuscale.c15
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();