lib/test_vmalloc.c: introduce xfail for failing tests

The test align_shift_alloc_test is expected to fail.  Reporting the test
as fail confuses to be a genuine failure.  Introduce widely used xfail
sematics to address the issue.

Note: a warn_alloc dump similar to below is still expected:

 Call Trace:
  <TASK>
  dump_stack_lvl+0x64/0x80
  warn_alloc+0x137/0x1b0
  ? __get_vm_area_node+0x134/0x140

Snippet of dmesg after change:

Summary: random_size_align_alloc_test passed: 1 failed: 0 xfailed: 0 ..
Summary: align_shift_alloc_test passed: 0 failed: 0 xfailed: 1 ..
Summary: pcpu_alloc_test passed: 1 failed: 0 xfailed: 0 ..

Link: https://lkml.kernel.org/r/20250702064319.885-1-raghavendra.kt@amd.com
Signed-off-by: Raghavendra K T <raghavendra.kt@amd.com>
Reviewed-by: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Cc: Dev Jain <dev.jain@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/lib/test_vmalloc.c b/lib/test_vmalloc.c
index c1966cf72ab89b46937dd1ae3f0f1685381d376e..2815658ccc37550374f91a677e15a734e62c891d 100644 (file)
--- a/lib/test_vmalloc.c
+++ b/lib/test_vmalloc.c
@@ -396,25 +396,27 @@ cleanup:
 struct test_case_desc {
        const char *test_name;
        int (*test_func)(void);
+       bool xfail;
 };
 
 static struct test_case_desc test_case_array[] = {
-       { "fix_size_alloc_test", fix_size_alloc_test },
-       { "full_fit_alloc_test", full_fit_alloc_test },
-       { "long_busy_list_alloc_test", long_busy_list_alloc_test },
-       { "random_size_alloc_test", random_size_alloc_test },
-       { "fix_align_alloc_test", fix_align_alloc_test },
-       { "random_size_align_alloc_test", random_size_align_alloc_test },
-       { "align_shift_alloc_test", align_shift_alloc_test },
-       { "pcpu_alloc_test", pcpu_alloc_test },
-       { "kvfree_rcu_1_arg_vmalloc_test", kvfree_rcu_1_arg_vmalloc_test },
-       { "kvfree_rcu_2_arg_vmalloc_test", kvfree_rcu_2_arg_vmalloc_test },
-       { "vm_map_ram_test", vm_map_ram_test },
+       { "fix_size_alloc_test", fix_size_alloc_test, },
+       { "full_fit_alloc_test", full_fit_alloc_test, },
+       { "long_busy_list_alloc_test", long_busy_list_alloc_test, },
+       { "random_size_alloc_test", random_size_alloc_test, },
+       { "fix_align_alloc_test", fix_align_alloc_test, },
+       { "random_size_align_alloc_test", random_size_align_alloc_test, },
+       { "align_shift_alloc_test", align_shift_alloc_test, true },
+       { "pcpu_alloc_test", pcpu_alloc_test, },
+       { "kvfree_rcu_1_arg_vmalloc_test", kvfree_rcu_1_arg_vmalloc_test, },
+       { "kvfree_rcu_2_arg_vmalloc_test", kvfree_rcu_2_arg_vmalloc_test, },
+       { "vm_map_ram_test", vm_map_ram_test, },
        /* Add a new test case here. */
 };
 
 struct test_case_data {
        int test_failed;
+       int test_xfailed;
        int test_passed;
        u64 time;
 };
@@ -444,7 +446,7 @@ static int test_func(void *private)
 {
        struct test_driver *t = private;
        int random_array[ARRAY_SIZE(test_case_array)];
-       int index, i, j;
+       int index, i, j, ret;
        ktime_t kt;
        u64 delta;
 
@@ -468,11 +470,14 @@ static int test_func(void *private)
                 */
                if (!((run_test_mask & (1 << index)) >> index))
                        continue;
-
                kt = ktime_get();
                for (j = 0; j < test_repeat_count; j++) {
-                       if (!test_case_array[index].test_func())
+                       ret = test_case_array[index].test_func();
+
+                       if (!ret && !test_case_array[index].xfail)
                                t->data[index].test_passed++;
+                       else if (ret && test_case_array[index].xfail)
+                               t->data[index].test_xfailed++;
                        else
                                t->data[index].test_failed++;
                }
@@ -576,10 +581,11 @@ static void do_concurrent_test(void)
                                continue;
 
                        pr_info(
-                               "Summary: %s passed: %d failed: %d repeat: %d loops: %d avg: %llu usec\n",
+                               "Summary: %s passed: %d failed: %d xfailed: %d repeat: %d loops: %d avg: %llu usec\n",
                                test_case_array[j].test_name,
                                t->data[j].test_passed,
                                t->data[j].test_failed,
+                               t->data[j].test_xfailed,
                                test_repeat_count, test_loop_count,
                                t->data[j].time);
                }