[RFC 1/7] lib/test_vmalloc: Add non-block-alloc-test case

Uladzislau Rezki (Sony)
2025-07-04T15:25:45Z

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
lib/test_vmalloc.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)

diff --git a/lib/test_vmalloc.c b/lib/test_vmalloc.c
index 1b0b59549aaf..9e3429dfe176 100644
--- a/lib/test_vmalloc.c
+++ b/lib/test_vmalloc.c
@@ -54,6 +54,7 @@ __param(int, run_test_mask, INT_MAX,
"\t\tid: 256, name: kvfree_rcu_1_arg_vmalloc_test\n"
"\t\tid: 512, name: kvfree_rcu_2_arg_vmalloc_test\n"
"\t\tid: 1024, name: vm_map_ram_test\n"
+ "\t\tid: 2048, name: no_block_alloc_test\n"
/* Add a new test case description here. */
);

@@ -283,6 +284,31 @@ static int fix_size_alloc_test(void)
return 0;
}

+static DEFINE_SPINLOCK(no_block_alloc_lock);
+
+static int no_block_alloc_test(void)
+{
+ void *ptr;
+ u8 rnd;
+ int i;
+
+ for (i = 0; i < test_loop_count; i++) {
+ rnd = get_random_u8();
+
+ spin_lock(&no_block_alloc_lock);
+ ptr = __vmalloc(PAGE_SIZE, (rnd % 2) ? GFP_NOWAIT : GFP_ATOMIC);
+ spin_unlock(&no_block_alloc_lock);
+
+ if (!ptr)
+ return -1;
+
+ *((__u8 *)ptr) = 0;
+ vfree(ptr);
+ }
+
+ return 0;
+}
+
static int
pcpu_alloc_test(void)
{
@@ -410,6 +436,7 @@ static struct test_case_desc test_case_array[] = {
{ "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 },
+ { "no_block_alloc_test", no_block_alloc_test },
/* Add a new test case here. */
};

--
2.39.5