diff options
Diffstat (limited to 'lib/test_rhashtable.c')
| -rw-r--r-- | lib/test_rhashtable.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/test_rhashtable.c b/lib/test_rhashtable.c index 69f5b3849980..1eee90e6e394 100644 --- a/lib/test_rhashtable.c +++ b/lib/test_rhashtable.c @@ -246,6 +246,43 @@ static s64 __init test_rhashtable(struct rhashtable *ht, struct test_obj *array, static struct rhashtable ht; +static int __init test_rhashtable_max(struct test_obj *array, + unsigned int entries) +{ + unsigned int i, insert_retries = 0; + int err; + + test_rht_params.max_size = roundup_pow_of_two(entries / 8); + err = rhashtable_init(&ht, &test_rht_params); + if (err) + return err; + + for (i = 0; i < ht.max_elems; i++) { + struct test_obj *obj = &array[i]; + + obj->value.id = i * 2; + err = insert_retry(&ht, obj, test_rht_params); + if (err > 0) + insert_retries += err; + else if (err) + return err; + } + + err = insert_retry(&ht, &array[ht.max_elems], test_rht_params); + if (err == -E2BIG) { + err = 0; + } else { + pr_info("insert element %u should have failed with %d, got %d\n", + ht.max_elems, -E2BIG, err); + if (err == 0) + err = -1; + } + + rhashtable_destroy(&ht); + + return err; +} + static int thread_lookup_test(struct thread_data *tdata) { unsigned int entries = tdata->entries; @@ -386,7 +423,11 @@ static int __init test_rht_init(void) total_time += time; } + pr_info("test if its possible to exceed max_size %d: %s\n", + test_rht_params.max_size, test_rhashtable_max(objs, entries) == 0 ? + "no, ok" : "YES, failed"); vfree(objs); + do_div(total_time, runs); pr_info("Average test time: %llu\n", total_time); |