The patch titled
Subject: lib/test_vmalloc.c: add vm_map_ram()/vm_unmap_ram() test case
has been added to the -mm mm-unstable branch. Its filename is
lib-test_vmallocc-add-vm_map_ram-vm_unmap_ram-test-case.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-test_vmallocc-add-vm_map_ram-vm_unmap_ram-test-case.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>
Subject: lib/test_vmalloc.c: add vm_map_ram()/vm_unmap_ram() test case
Date: Thu, 30 Mar 2023 21:06:39 +0200
Add vm_map_ram()/vm_unmap_ram() test case to our stress test-suite.
Link: https://lkml.kernel.org/r/20230330190639.431589-2-urezki@xxxxxxxxx
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/test_vmalloc.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
--- a/lib/test_vmalloc.c~lib-test_vmallocc-add-vm_map_ram-vm_unmap_ram-test-case
+++ a/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 +359,41 @@ 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_a
{ "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. */
};
_
Patches currently in -mm which might be from urezki@xxxxxxxxx are
mm-vmalloc-remove-a-global-vmap_blocks-xarray.patch
lib-test_vmallocc-add-vm_map_ram-vm_unmap_ram-test-case.patch
