selftests/vm: rename selftests/vm to selftests/mm

Rename selftets/vm to selftests/mm for being more consistent with the
code, documentation, and tools directories, and won't be confused with
virtual machines.

[sj@kernel.org: convert missing vm->mm changes]
  Link: https://lkml.kernel.org/r/20230107230643.252273-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20230103180754.129637-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 0 insertions, 210 deletions

diff --git a/tools/testing/selftests/vm/soft-dirty.c b/tools/testing/selftests/vm/soft-dirty.c
deleted file mode 100644
index 21d8830c5f24..000000000000
--- a/tools/testing/selftests/vm/soft-dirty.c
+++ /dev/null
@@ -1,210 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <stdio.h>
-#include <string.h>
-#include <stdbool.h>
-#include <fcntl.h>
-#include <stdint.h>
-#include <malloc.h>
-#include <sys/mman.h>
-#include "../kselftest.h"
-#include "vm_util.h"
-
-#define PAGEMAP_FILE_PATH "/proc/self/pagemap"
-#define TEST_ITERATIONS 10000
-
-static void test_simple(int pagemap_fd, int pagesize)
-{
-	int i;
-	char *map;
-
-	map = aligned_alloc(pagesize, pagesize);
-	if (!map)
-		ksft_exit_fail_msg("mmap failed\n");
-
-	clear_softdirty();
-
-	for (i = 0 ; i < TEST_ITERATIONS; i++) {
-		if (pagemap_is_softdirty(pagemap_fd, map) == 1) {
-			ksft_print_msg("dirty bit was 1, but should be 0 (i=%d)\n", i);
-			break;
-		}
-
-		clear_softdirty();
-		// Write something to the page to get the dirty bit enabled on the page
-		map[0]++;
-
-		if (pagemap_is_softdirty(pagemap_fd, map) == 0) {
-			ksft_print_msg("dirty bit was 0, but should be 1 (i=%d)\n", i);
-			break;
-		}
-
-		clear_softdirty();
-	}
-	free(map);
-
-	ksft_test_result(i == TEST_ITERATIONS, "Test %s\n", __func__);
-}
-
-static void test_vma_reuse(int pagemap_fd, int pagesize)
-{
-	char *map, *map2;
-
-	map = mmap(NULL, pagesize, (PROT_READ | PROT_WRITE), (MAP_PRIVATE | MAP_ANON), -1, 0);
-	if (map == MAP_FAILED)
-		ksft_exit_fail_msg("mmap failed");
-
-	// The kernel always marks new regions as soft dirty
-	ksft_test_result(pagemap_is_softdirty(pagemap_fd, map) == 1,
-			 "Test %s dirty bit of allocated page\n", __func__);
-
-	clear_softdirty();
-	munmap(map, pagesize);
-
-	map2 = mmap(NULL, pagesize, (PROT_READ | PROT_WRITE), (MAP_PRIVATE | MAP_ANON), -1, 0);
-	if (map2 == MAP_FAILED)
-		ksft_exit_fail_msg("mmap failed");
-
-	// Dirty bit is set for new regions even if they are reused
-	if (map == map2)
-		ksft_test_result(pagemap_is_softdirty(pagemap_fd, map2) == 1,
-				 "Test %s dirty bit of reused address page\n", __func__);
-	else
-		ksft_test_result_skip("Test %s dirty bit of reused address page\n", __func__);
-
-	munmap(map2, pagesize);
-}
-
-static void test_hugepage(int pagemap_fd, int pagesize)
-{
-	char *map;
-	int i, ret;
-	size_t hpage_len = read_pmd_pagesize();
-
-	map = memalign(hpage_len, hpage_len);
-	if (!map)
-		ksft_exit_fail_msg("memalign failed\n");
-
-	ret = madvise(map, hpage_len, MADV_HUGEPAGE);
-	if (ret)
-		ksft_exit_fail_msg("madvise failed %d\n", ret);
-
-	for (i = 0; i < hpage_len; i++)
-		map[i] = (char)i;
-
-	if (check_huge_anon(map, 1, hpage_len)) {
-		ksft_test_result_pass("Test %s huge page allocation\n", __func__);
-
-		clear_softdirty();
-		for (i = 0 ; i < TEST_ITERATIONS ; i++) {
-			if (pagemap_is_softdirty(pagemap_fd, map) == 1) {
-				ksft_print_msg("dirty bit was 1, but should be 0 (i=%d)\n", i);
-				break;
-			}
-
-			clear_softdirty();
-			// Write something to the page to get the dirty bit enabled on the page
-			map[0]++;
-
-			if (pagemap_is_softdirty(pagemap_fd, map) == 0) {
-				ksft_print_msg("dirty bit was 0, but should be 1 (i=%d)\n", i);
-				break;
-			}
-			clear_softdirty();
-		}
-
-		ksft_test_result(i == TEST_ITERATIONS, "Test %s huge page dirty bit\n", __func__);
-	} else {
-		// hugepage allocation failed. skip these tests
-		ksft_test_result_skip("Test %s huge page allocation\n", __func__);
-		ksft_test_result_skip("Test %s huge page dirty bit\n", __func__);
-	}
-	free(map);
-}
-
-static void test_mprotect(int pagemap_fd, int pagesize, bool anon)
-{
-	const char *type[] = {"file", "anon"};
-	const char *fname = "./soft-dirty-test-file";
-	int test_fd;
-	char *map;
-
-	if (anon) {
-		map = mmap(NULL, pagesize, PROT_READ|PROT_WRITE,
-			   MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
-		if (!map)
-			ksft_exit_fail_msg("anon mmap failed\n");
-	} else {
-		test_fd = open(fname, O_RDWR | O_CREAT);
-		if (test_fd < 0) {
-			ksft_test_result_skip("Test %s open() file failed\n", __func__);
-			return;
-		}
-		unlink(fname);
-		ftruncate(test_fd, pagesize);
-		map = mmap(NULL, pagesize, PROT_READ|PROT_WRITE,
-			   MAP_SHARED, test_fd, 0);
-		if (!map)
-			ksft_exit_fail_msg("file mmap failed\n");
-	}
-
-	*map = 1;
-	ksft_test_result(pagemap_is_softdirty(pagemap_fd, map) == 1,
-			 "Test %s-%s dirty bit of new written page\n",
-			 __func__, type[anon]);
-	clear_softdirty();
-	ksft_test_result(pagemap_is_softdirty(pagemap_fd, map) == 0,
-			 "Test %s-%s soft-dirty clear after clear_refs\n",
-			 __func__, type[anon]);
-	mprotect(map, pagesize, PROT_READ);
-	ksft_test_result(pagemap_is_softdirty(pagemap_fd, map) == 0,
-			 "Test %s-%s soft-dirty clear after marking RO\n",
-			 __func__, type[anon]);
-	mprotect(map, pagesize, PROT_READ|PROT_WRITE);
-	ksft_test_result(pagemap_is_softdirty(pagemap_fd, map) == 0,
-			 "Test %s-%s soft-dirty clear after marking RW\n",
-			 __func__, type[anon]);
-	*map = 2;
-	ksft_test_result(pagemap_is_softdirty(pagemap_fd, map) == 1,
-			 "Test %s-%s soft-dirty after rewritten\n",
-			 __func__, type[anon]);
-
-	munmap(map, pagesize);
-
-	if (!anon)
-		close(test_fd);
-}
-
-static void test_mprotect_anon(int pagemap_fd, int pagesize)
-{
-	test_mprotect(pagemap_fd, pagesize, true);
-}
-
-static void test_mprotect_file(int pagemap_fd, int pagesize)
-{
-	test_mprotect(pagemap_fd, pagesize, false);
-}
-
-int main(int argc, char **argv)
-{
-	int pagemap_fd;
-	int pagesize;
-
-	ksft_print_header();
-	ksft_set_plan(15);
-
-	pagemap_fd = open(PAGEMAP_FILE_PATH, O_RDONLY);
-	if (pagemap_fd < 0)
-		ksft_exit_fail_msg("Failed to open %s\n", PAGEMAP_FILE_PATH);
-
-	pagesize = getpagesize();
-
-	test_simple(pagemap_fd, pagesize);
-	test_vma_reuse(pagemap_fd, pagesize);
-	test_hugepage(pagemap_fd, pagesize);
-	test_mprotect_anon(pagemap_fd, pagesize);
-	test_mprotect_file(pagemap_fd, pagesize);
-
-	close(pagemap_fd);
-
-	return ksft_exit_pass();
-}