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lib/test_vmalloc.c: add vm_map_ram()/vm_unmap_ram() test case 

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

[akpm@linux-foundation.org: fix whitespace, per Lorenzo]
Link: https://lkml.kernel.org/r/20230330190639.431589-2-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Lorenzo Stoakes <lstoakes@gmail.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Uladzislau Rezki (Sony) 2023-03-30 21:06:39 +02:00 committed by Andrew Morton
parent 062eacf57a
commit 869cb29a61
1 changed files with 37 additions and 0 deletions
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37
lib/test_vmalloc.c
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@ -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 +359,41 @@ kvfree_rcu_2_arg_vmalloc_test(void)
return 0;
}
static int
vm_map_ram_test(void)
{
unsigned long nr_allocated;
unsigned int map_nr_pages;
unsigned char *v_ptr;
struct page **pages;
int i;
map_nr_pages = nr_pages > 0 ? nr_pages:1;
pages = kmalloc(map_nr_pages * sizeof(struct page), GFP_KERNEL);
if (!pages)
return -1;
nr_allocated = alloc_pages_bulk_array(GFP_KERNEL, map_nr_pages, pages);
if (nr_allocated != map_nr_pages)
goto cleanup;
/* Run the test loop. */
for (i = 0; i < test_loop_count; i++) {
v_ptr = vm_map_ram(pages, map_nr_pages, NUMA_NO_NODE);
*v_ptr = 'a';
vm_unmap_ram(v_ptr, map_nr_pages);
}
cleanup:
for (i = 0; i < nr_allocated; i++)
__free_page(pages[i]);
kfree(pages);
/* 0 indicates success. */
return nr_allocated != map_nr_pages;
}
struct test_case_desc {
const char *test_name;
int (*test_func)(void);
@ -374,6 +410,7 @@ 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. */
};