[PATCH v3 2/2] lib/test_vmalloc.c: Add vm_map_ram()/vm_unmap_ram() test case

Uladzislau Rezki (Sony)
2023-03-27T17:01:49Z

Add vm_map_ram()/vm_unmap_ram() test case to our stress test-suite.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
lib/test_vmalloc.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)

diff --git a/lib/test_vmalloc.c b/lib/test_vmalloc.c
index cd2bdba6d3ed..6633eda4cd4d 100644
--- a/lib/test_vmalloc.c
+++ b/lib/test_vmalloc.c
@@ -53,6 +53,7 @@ __param(int, run_test_mask, INT_MAX,
"\t\tid: 128, name: pcpu_alloc_test\n"
"\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"
/* Add a new test case description here. */
);

@@ -358,6 +359,45 @@ kvfree_rcu_2_arg_vmalloc_test(void)
return 0;
}

+static int
+vm_map_ram_test(void)
+{
+ unsigned int map_nr_pages;
+ unsigned char *v_ptr;
+ unsigned char *p_ptr;
+ struct page **pages;
+ struct page *page;
+ int i;
+
+ map_nr_pages = nr_pages > 0 ? nr_pages:1;
+ pages = kmalloc(map_nr_pages * sizeof(*page), GFP_KERNEL);
+ if (!pages)
+ return -1;
+
+ for (i = 0; i < map_nr_pages; i++) {
+ page = alloc_pages(GFP_KERNEL, 1);
+ if (!page)
+ return -1;
+
+ pages[i] = page;
+ }
+
+ /* Run the test loop. */
+ for (i = 0; i < test_loop_count; i++) {
+ v_ptr = vm_map_ram(pages, map_nr_pages, -1);
+ *v_ptr = 'a';
+ vm_unmap_ram(v_ptr, map_nr_pages);
+ }
+
+ for (i = 0; i < map_nr_pages; i++) {
+ p_ptr = page_address(pages[i]);
+ free_pages((unsigned long)p_ptr, 1);
+ }
+
+ kfree(pages);
+ return 0;
+}
+
struct test_case_desc {
const char *test_name;
int (*test_func)(void);
@@ -374,6 +414,7 @@ static struct test_case_desc test_case_array[] = {
{ "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. */
};

--
2.30.2