Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1 | #define _GNU_SOURCE |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 2 | #include <ctype.h> |
Zach O'Keefe | 3505c8e | 2022-09-22 11:46:51 -0700 | [diff] [blame] | 3 | #include <errno.h> |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 4 | #include <fcntl.h> |
| 5 | #include <limits.h> |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 6 | #include <dirent.h> |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 7 | #include <signal.h> |
| 8 | #include <stdio.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <stdbool.h> |
| 11 | #include <string.h> |
| 12 | #include <unistd.h> |
| 13 | |
Muhammad Usama Anjum | 0183d77 | 2023-06-12 14:53:47 +0500 | [diff] [blame] | 14 | #include <linux/mman.h> |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 15 | #include <sys/mman.h> |
| 16 | #include <sys/wait.h> |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 17 | #include <sys/types.h> |
| 18 | #include <sys/stat.h> |
| 19 | #include <sys/sysmacros.h> |
| 20 | #include <sys/vfs.h> |
| 21 | |
| 22 | #include "linux/magic.h" |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 23 | |
Zach O'Keefe | c07c343 | 2022-09-22 15:40:41 -0700 | [diff] [blame] | 24 | #include "vm_util.h" |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 25 | #include "thp_settings.h" |
Zach O'Keefe | c07c343 | 2022-09-22 15:40:41 -0700 | [diff] [blame] | 26 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 27 | #define BASE_ADDR ((void *)(1UL << 30)) |
| 28 | static unsigned long hpage_pmd_size; |
| 29 | static unsigned long page_size; |
| 30 | static int hpage_pmd_nr; |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 31 | static int anon_order; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 32 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 33 | #define PID_SMAPS "/proc/self/smaps" |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 34 | #define TEST_FILE "collapse_test_file" |
| 35 | |
| 36 | #define MAX_LINE_LENGTH 500 |
| 37 | |
| 38 | enum vma_type { |
| 39 | VMA_ANON, |
| 40 | VMA_FILE, |
| 41 | VMA_SHMEM, |
| 42 | }; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 43 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 44 | struct mem_ops { |
| 45 | void *(*setup_area)(int nr_hpages); |
| 46 | void (*cleanup_area)(void *p, unsigned long size); |
| 47 | void (*fault)(void *p, unsigned long start, unsigned long end); |
| 48 | bool (*check_huge)(void *addr, int nr_hpages); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 49 | const char *name; |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 50 | }; |
| 51 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 52 | static struct mem_ops *file_ops; |
| 53 | static struct mem_ops *anon_ops; |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 54 | static struct mem_ops *shmem_ops; |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 55 | |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 56 | struct collapse_context { |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 57 | void (*collapse)(const char *msg, char *p, int nr_hpages, |
| 58 | struct mem_ops *ops, bool expect); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 59 | bool enforce_pte_scan_limits; |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 60 | const char *name; |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 61 | }; |
| 62 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 63 | static struct collapse_context *khugepaged_context; |
| 64 | static struct collapse_context *madvise_context; |
| 65 | |
| 66 | struct file_info { |
| 67 | const char *dir; |
| 68 | char path[PATH_MAX]; |
| 69 | enum vma_type type; |
| 70 | int fd; |
| 71 | char dev_queue_read_ahead_path[PATH_MAX]; |
| 72 | }; |
| 73 | |
| 74 | static struct file_info finfo; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 75 | static bool skip_settings_restore; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 76 | static int exit_status; |
| 77 | |
| 78 | static void success(const char *msg) |
| 79 | { |
| 80 | printf(" \e[32m%s\e[0m\n", msg); |
| 81 | } |
| 82 | |
| 83 | static void fail(const char *msg) |
| 84 | { |
| 85 | printf(" \e[31m%s\e[0m\n", msg); |
| 86 | exit_status++; |
| 87 | } |
| 88 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 89 | static void skip(const char *msg) |
| 90 | { |
| 91 | printf(" \e[33m%s\e[0m\n", msg); |
| 92 | } |
| 93 | |
Ryan Roberts | b6aab33 | 2023-12-07 16:12:06 +0000 | [diff] [blame] | 94 | static void restore_settings_atexit(void) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 95 | { |
| 96 | if (skip_settings_restore) |
Ryan Roberts | b6aab33 | 2023-12-07 16:12:06 +0000 | [diff] [blame] | 97 | return; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 98 | |
| 99 | printf("Restore THP and khugepaged settings..."); |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 100 | thp_restore_settings(); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 101 | success("OK"); |
Ryan Roberts | b6aab33 | 2023-12-07 16:12:06 +0000 | [diff] [blame] | 102 | |
| 103 | skip_settings_restore = true; |
| 104 | } |
| 105 | |
| 106 | static void restore_settings(int sig) |
| 107 | { |
| 108 | /* exit() will invoke the restore_settings_atexit handler. */ |
| 109 | exit(sig ? EXIT_FAILURE : exit_status); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | static void save_settings(void) |
| 113 | { |
| 114 | printf("Save THP and khugepaged settings..."); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 115 | if (file_ops && finfo.type == VMA_FILE) |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 116 | thp_set_read_ahead_path(finfo.dev_queue_read_ahead_path); |
| 117 | thp_save_settings(); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 118 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 119 | success("OK"); |
| 120 | |
Ryan Roberts | b6aab33 | 2023-12-07 16:12:06 +0000 | [diff] [blame] | 121 | atexit(restore_settings_atexit); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 122 | signal(SIGTERM, restore_settings); |
| 123 | signal(SIGINT, restore_settings); |
| 124 | signal(SIGHUP, restore_settings); |
| 125 | signal(SIGQUIT, restore_settings); |
| 126 | } |
| 127 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 128 | static void get_finfo(const char *dir) |
| 129 | { |
| 130 | struct stat path_stat; |
| 131 | struct statfs fs; |
| 132 | char buf[1 << 10]; |
| 133 | char path[PATH_MAX]; |
| 134 | char *str, *end; |
| 135 | |
| 136 | finfo.dir = dir; |
| 137 | stat(finfo.dir, &path_stat); |
| 138 | if (!S_ISDIR(path_stat.st_mode)) { |
| 139 | printf("%s: Not a directory (%s)\n", __func__, finfo.dir); |
| 140 | exit(EXIT_FAILURE); |
| 141 | } |
| 142 | if (snprintf(finfo.path, sizeof(finfo.path), "%s/" TEST_FILE, |
| 143 | finfo.dir) >= sizeof(finfo.path)) { |
| 144 | printf("%s: Pathname is too long\n", __func__); |
| 145 | exit(EXIT_FAILURE); |
| 146 | } |
| 147 | if (statfs(finfo.dir, &fs)) { |
| 148 | perror("statfs()"); |
| 149 | exit(EXIT_FAILURE); |
| 150 | } |
| 151 | finfo.type = fs.f_type == TMPFS_MAGIC ? VMA_SHMEM : VMA_FILE; |
| 152 | if (finfo.type == VMA_SHMEM) |
| 153 | return; |
| 154 | |
| 155 | /* Find owning device's queue/read_ahead_kb control */ |
| 156 | if (snprintf(path, sizeof(path), "/sys/dev/block/%d:%d/uevent", |
| 157 | major(path_stat.st_dev), minor(path_stat.st_dev)) |
| 158 | >= sizeof(path)) { |
| 159 | printf("%s: Pathname is too long\n", __func__); |
| 160 | exit(EXIT_FAILURE); |
| 161 | } |
| 162 | if (read_file(path, buf, sizeof(buf)) < 0) { |
| 163 | perror("read_file(read_num)"); |
| 164 | exit(EXIT_FAILURE); |
| 165 | } |
| 166 | if (strstr(buf, "DEVTYPE=disk")) { |
| 167 | /* Found it */ |
| 168 | if (snprintf(finfo.dev_queue_read_ahead_path, |
| 169 | sizeof(finfo.dev_queue_read_ahead_path), |
| 170 | "/sys/dev/block/%d:%d/queue/read_ahead_kb", |
| 171 | major(path_stat.st_dev), minor(path_stat.st_dev)) |
| 172 | >= sizeof(finfo.dev_queue_read_ahead_path)) { |
| 173 | printf("%s: Pathname is too long\n", __func__); |
| 174 | exit(EXIT_FAILURE); |
| 175 | } |
| 176 | return; |
| 177 | } |
| 178 | if (!strstr(buf, "DEVTYPE=partition")) { |
| 179 | printf("%s: Unknown device type: %s\n", __func__, path); |
| 180 | exit(EXIT_FAILURE); |
| 181 | } |
| 182 | /* |
| 183 | * Partition of block device - need to find actual device. |
| 184 | * Using naming convention that devnameN is partition of |
| 185 | * device devname. |
| 186 | */ |
| 187 | str = strstr(buf, "DEVNAME="); |
| 188 | if (!str) { |
| 189 | printf("%s: Could not read: %s", __func__, path); |
| 190 | exit(EXIT_FAILURE); |
| 191 | } |
| 192 | str += 8; |
| 193 | end = str; |
| 194 | while (*end) { |
| 195 | if (isdigit(*end)) { |
| 196 | *end = '\0'; |
| 197 | if (snprintf(finfo.dev_queue_read_ahead_path, |
| 198 | sizeof(finfo.dev_queue_read_ahead_path), |
| 199 | "/sys/block/%s/queue/read_ahead_kb", |
| 200 | str) >= sizeof(finfo.dev_queue_read_ahead_path)) { |
| 201 | printf("%s: Pathname is too long\n", __func__); |
| 202 | exit(EXIT_FAILURE); |
| 203 | } |
| 204 | return; |
| 205 | } |
| 206 | ++end; |
| 207 | } |
| 208 | printf("%s: Could not read: %s\n", __func__, path); |
| 209 | exit(EXIT_FAILURE); |
| 210 | } |
| 211 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 212 | static bool check_swap(void *addr, unsigned long size) |
| 213 | { |
| 214 | bool swap = false; |
| 215 | int ret; |
| 216 | FILE *fp; |
| 217 | char buffer[MAX_LINE_LENGTH]; |
| 218 | char addr_pattern[MAX_LINE_LENGTH]; |
| 219 | |
| 220 | ret = snprintf(addr_pattern, MAX_LINE_LENGTH, "%08lx-", |
| 221 | (unsigned long) addr); |
| 222 | if (ret >= MAX_LINE_LENGTH) { |
| 223 | printf("%s: Pattern is too long\n", __func__); |
| 224 | exit(EXIT_FAILURE); |
| 225 | } |
| 226 | |
| 227 | |
| 228 | fp = fopen(PID_SMAPS, "r"); |
| 229 | if (!fp) { |
| 230 | printf("%s: Failed to open file %s\n", __func__, PID_SMAPS); |
| 231 | exit(EXIT_FAILURE); |
| 232 | } |
Zach O'Keefe | c07c343 | 2022-09-22 15:40:41 -0700 | [diff] [blame] | 233 | if (!check_for_pattern(fp, addr_pattern, buffer, sizeof(buffer))) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 234 | goto err_out; |
| 235 | |
| 236 | ret = snprintf(addr_pattern, MAX_LINE_LENGTH, "Swap:%19ld kB", |
| 237 | size >> 10); |
| 238 | if (ret >= MAX_LINE_LENGTH) { |
| 239 | printf("%s: Pattern is too long\n", __func__); |
| 240 | exit(EXIT_FAILURE); |
| 241 | } |
| 242 | /* |
| 243 | * Fetch the Swap: in the same block and check whether it got |
| 244 | * the expected number of hugeepages next. |
| 245 | */ |
Zach O'Keefe | c07c343 | 2022-09-22 15:40:41 -0700 | [diff] [blame] | 246 | if (!check_for_pattern(fp, "Swap:", buffer, sizeof(buffer))) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 247 | goto err_out; |
| 248 | |
| 249 | if (strncmp(buffer, addr_pattern, strlen(addr_pattern))) |
| 250 | goto err_out; |
| 251 | |
| 252 | swap = true; |
| 253 | err_out: |
| 254 | fclose(fp); |
| 255 | return swap; |
| 256 | } |
| 257 | |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 258 | static void *alloc_mapping(int nr) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 259 | { |
| 260 | void *p; |
| 261 | |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 262 | p = mmap(BASE_ADDR, nr * hpage_pmd_size, PROT_READ | PROT_WRITE, |
| 263 | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 264 | if (p != BASE_ADDR) { |
| 265 | printf("Failed to allocate VMA at %p\n", BASE_ADDR); |
| 266 | exit(EXIT_FAILURE); |
| 267 | } |
| 268 | |
| 269 | return p; |
| 270 | } |
| 271 | |
| 272 | static void fill_memory(int *p, unsigned long start, unsigned long end) |
| 273 | { |
| 274 | int i; |
| 275 | |
| 276 | for (i = start / page_size; i < end / page_size; i++) |
| 277 | p[i * page_size / sizeof(*p)] = i + 0xdead0000; |
| 278 | } |
| 279 | |
Zach O'Keefe | be6667b | 2022-07-06 16:59:33 -0700 | [diff] [blame] | 280 | /* |
Zach O'Keefe | 3505c8e | 2022-09-22 11:46:51 -0700 | [diff] [blame] | 281 | * MADV_COLLAPSE is a best-effort request and may fail if an internal |
| 282 | * resource is temporarily unavailable, in which case it will set errno to |
| 283 | * EAGAIN. In such a case, immediately reattempt the operation one more |
| 284 | * time. |
| 285 | */ |
| 286 | static int madvise_collapse_retry(void *p, unsigned long size) |
| 287 | { |
| 288 | bool retry = true; |
| 289 | int ret; |
| 290 | |
| 291 | retry: |
| 292 | ret = madvise(p, size, MADV_COLLAPSE); |
| 293 | if (ret && errno == EAGAIN && retry) { |
| 294 | retry = false; |
| 295 | goto retry; |
| 296 | } |
| 297 | return ret; |
| 298 | } |
| 299 | |
| 300 | /* |
Zach O'Keefe | be6667b | 2022-07-06 16:59:33 -0700 | [diff] [blame] | 301 | * Returns pmd-mapped hugepage in VMA marked VM_HUGEPAGE, filled with |
| 302 | * validate_memory()'able contents. |
| 303 | */ |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 304 | static void *alloc_hpage(struct mem_ops *ops) |
Zach O'Keefe | be6667b | 2022-07-06 16:59:33 -0700 | [diff] [blame] | 305 | { |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 306 | void *p = ops->setup_area(1); |
Zach O'Keefe | be6667b | 2022-07-06 16:59:33 -0700 | [diff] [blame] | 307 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 308 | ops->fault(p, 0, hpage_pmd_size); |
| 309 | |
| 310 | /* |
| 311 | * VMA should be neither VM_HUGEPAGE nor VM_NOHUGEPAGE. |
| 312 | * The latter is ineligible for collapse by MADV_COLLAPSE |
| 313 | * while the former might cause MADV_COLLAPSE to race with |
| 314 | * khugepaged on low-load system (like a test machine), which |
| 315 | * would cause MADV_COLLAPSE to fail with EAGAIN. |
| 316 | */ |
Zach O'Keefe | be6667b | 2022-07-06 16:59:33 -0700 | [diff] [blame] | 317 | printf("Allocate huge page..."); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 318 | if (madvise_collapse_retry(p, hpage_pmd_size)) { |
| 319 | perror("madvise(MADV_COLLAPSE)"); |
| 320 | exit(EXIT_FAILURE); |
| 321 | } |
| 322 | if (!ops->check_huge(p, 1)) { |
| 323 | perror("madvise(MADV_COLLAPSE)"); |
| 324 | exit(EXIT_FAILURE); |
| 325 | } |
| 326 | if (madvise(p, hpage_pmd_size, MADV_HUGEPAGE)) { |
| 327 | perror("madvise(MADV_HUGEPAGE)"); |
| 328 | exit(EXIT_FAILURE); |
| 329 | } |
| 330 | success("OK"); |
Zach O'Keefe | be6667b | 2022-07-06 16:59:33 -0700 | [diff] [blame] | 331 | return p; |
| 332 | } |
| 333 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 334 | static void validate_memory(int *p, unsigned long start, unsigned long end) |
| 335 | { |
| 336 | int i; |
| 337 | |
| 338 | for (i = start / page_size; i < end / page_size; i++) { |
| 339 | if (p[i * page_size / sizeof(*p)] != i + 0xdead0000) { |
| 340 | printf("Page %d is corrupted: %#x\n", |
| 341 | i, p[i * page_size / sizeof(*p)]); |
| 342 | exit(EXIT_FAILURE); |
| 343 | } |
| 344 | } |
| 345 | } |
| 346 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 347 | static void *anon_setup_area(int nr_hpages) |
| 348 | { |
| 349 | return alloc_mapping(nr_hpages); |
| 350 | } |
| 351 | |
| 352 | static void anon_cleanup_area(void *p, unsigned long size) |
| 353 | { |
| 354 | munmap(p, size); |
| 355 | } |
| 356 | |
| 357 | static void anon_fault(void *p, unsigned long start, unsigned long end) |
| 358 | { |
| 359 | fill_memory(p, start, end); |
| 360 | } |
| 361 | |
| 362 | static bool anon_check_huge(void *addr, int nr_hpages) |
| 363 | { |
| 364 | return check_huge_anon(addr, nr_hpages, hpage_pmd_size); |
| 365 | } |
| 366 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 367 | static void *file_setup_area(int nr_hpages) |
| 368 | { |
| 369 | int fd; |
| 370 | void *p; |
| 371 | unsigned long size; |
| 372 | |
| 373 | unlink(finfo.path); /* Cleanup from previous failed tests */ |
| 374 | printf("Creating %s for collapse%s...", finfo.path, |
| 375 | finfo.type == VMA_SHMEM ? " (tmpfs)" : ""); |
| 376 | fd = open(finfo.path, O_DSYNC | O_CREAT | O_RDWR | O_TRUNC | O_EXCL, |
| 377 | 777); |
| 378 | if (fd < 0) { |
| 379 | perror("open()"); |
| 380 | exit(EXIT_FAILURE); |
| 381 | } |
| 382 | |
| 383 | size = nr_hpages * hpage_pmd_size; |
| 384 | p = alloc_mapping(nr_hpages); |
| 385 | fill_memory(p, 0, size); |
| 386 | write(fd, p, size); |
| 387 | close(fd); |
| 388 | munmap(p, size); |
| 389 | success("OK"); |
| 390 | |
| 391 | printf("Opening %s read only for collapse...", finfo.path); |
| 392 | finfo.fd = open(finfo.path, O_RDONLY, 777); |
| 393 | if (finfo.fd < 0) { |
| 394 | perror("open()"); |
| 395 | exit(EXIT_FAILURE); |
| 396 | } |
| 397 | p = mmap(BASE_ADDR, size, PROT_READ | PROT_EXEC, |
| 398 | MAP_PRIVATE, finfo.fd, 0); |
| 399 | if (p == MAP_FAILED || p != BASE_ADDR) { |
| 400 | perror("mmap()"); |
| 401 | exit(EXIT_FAILURE); |
| 402 | } |
| 403 | |
| 404 | /* Drop page cache */ |
| 405 | write_file("/proc/sys/vm/drop_caches", "3", 2); |
| 406 | success("OK"); |
| 407 | return p; |
| 408 | } |
| 409 | |
| 410 | static void file_cleanup_area(void *p, unsigned long size) |
| 411 | { |
| 412 | munmap(p, size); |
| 413 | close(finfo.fd); |
| 414 | unlink(finfo.path); |
| 415 | } |
| 416 | |
| 417 | static void file_fault(void *p, unsigned long start, unsigned long end) |
| 418 | { |
| 419 | if (madvise(((char *)p) + start, end - start, MADV_POPULATE_READ)) { |
| 420 | perror("madvise(MADV_POPULATE_READ"); |
| 421 | exit(EXIT_FAILURE); |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | static bool file_check_huge(void *addr, int nr_hpages) |
| 426 | { |
| 427 | switch (finfo.type) { |
| 428 | case VMA_FILE: |
| 429 | return check_huge_file(addr, nr_hpages, hpage_pmd_size); |
| 430 | case VMA_SHMEM: |
| 431 | return check_huge_shmem(addr, nr_hpages, hpage_pmd_size); |
| 432 | default: |
| 433 | exit(EXIT_FAILURE); |
| 434 | return false; |
| 435 | } |
| 436 | } |
| 437 | |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 438 | static void *shmem_setup_area(int nr_hpages) |
| 439 | { |
| 440 | void *p; |
| 441 | unsigned long size = nr_hpages * hpage_pmd_size; |
| 442 | |
| 443 | finfo.fd = memfd_create("khugepaged-selftest-collapse-shmem", 0); |
| 444 | if (finfo.fd < 0) { |
| 445 | perror("memfd_create()"); |
| 446 | exit(EXIT_FAILURE); |
| 447 | } |
| 448 | if (ftruncate(finfo.fd, size)) { |
| 449 | perror("ftruncate()"); |
| 450 | exit(EXIT_FAILURE); |
| 451 | } |
| 452 | p = mmap(BASE_ADDR, size, PROT_READ | PROT_WRITE, MAP_SHARED, finfo.fd, |
| 453 | 0); |
| 454 | if (p != BASE_ADDR) { |
| 455 | perror("mmap()"); |
| 456 | exit(EXIT_FAILURE); |
| 457 | } |
| 458 | return p; |
| 459 | } |
| 460 | |
| 461 | static void shmem_cleanup_area(void *p, unsigned long size) |
| 462 | { |
| 463 | munmap(p, size); |
| 464 | close(finfo.fd); |
| 465 | } |
| 466 | |
| 467 | static bool shmem_check_huge(void *addr, int nr_hpages) |
| 468 | { |
| 469 | return check_huge_shmem(addr, nr_hpages, hpage_pmd_size); |
| 470 | } |
| 471 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 472 | static struct mem_ops __anon_ops = { |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 473 | .setup_area = &anon_setup_area, |
| 474 | .cleanup_area = &anon_cleanup_area, |
| 475 | .fault = &anon_fault, |
| 476 | .check_huge = &anon_check_huge, |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 477 | .name = "anon", |
| 478 | }; |
| 479 | |
| 480 | static struct mem_ops __file_ops = { |
| 481 | .setup_area = &file_setup_area, |
| 482 | .cleanup_area = &file_cleanup_area, |
| 483 | .fault = &file_fault, |
| 484 | .check_huge = &file_check_huge, |
| 485 | .name = "file", |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 486 | }; |
| 487 | |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 488 | static struct mem_ops __shmem_ops = { |
| 489 | .setup_area = &shmem_setup_area, |
| 490 | .cleanup_area = &shmem_cleanup_area, |
| 491 | .fault = &anon_fault, |
| 492 | .check_huge = &shmem_check_huge, |
| 493 | .name = "shmem", |
| 494 | }; |
| 495 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 496 | static void __madvise_collapse(const char *msg, char *p, int nr_hpages, |
| 497 | struct mem_ops *ops, bool expect) |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 498 | { |
| 499 | int ret; |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 500 | struct thp_settings settings = *thp_current_settings(); |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 501 | |
| 502 | printf("%s...", msg); |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 503 | |
| 504 | /* |
| 505 | * Prevent khugepaged interference and tests that MADV_COLLAPSE |
| 506 | * ignores /sys/kernel/mm/transparent_hugepage/enabled |
| 507 | */ |
| 508 | settings.thp_enabled = THP_NEVER; |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 509 | settings.shmem_enabled = SHMEM_NEVER; |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 510 | thp_push_settings(&settings); |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 511 | |
| 512 | /* Clear VM_NOHUGEPAGE */ |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 513 | madvise(p, nr_hpages * hpage_pmd_size, MADV_HUGEPAGE); |
Zach O'Keefe | 3505c8e | 2022-09-22 11:46:51 -0700 | [diff] [blame] | 514 | ret = madvise_collapse_retry(p, nr_hpages * hpage_pmd_size); |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 515 | if (((bool)ret) == expect) |
| 516 | fail("Fail: Bad return value"); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 517 | else if (!ops->check_huge(p, expect ? nr_hpages : 0)) |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 518 | fail("Fail: check_huge()"); |
| 519 | else |
| 520 | success("OK"); |
| 521 | |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 522 | thp_pop_settings(); |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 523 | } |
| 524 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 525 | static void madvise_collapse(const char *msg, char *p, int nr_hpages, |
| 526 | struct mem_ops *ops, bool expect) |
| 527 | { |
| 528 | /* Sanity check */ |
| 529 | if (!ops->check_huge(p, 0)) { |
| 530 | printf("Unexpected huge page\n"); |
| 531 | exit(EXIT_FAILURE); |
| 532 | } |
| 533 | __madvise_collapse(msg, p, nr_hpages, ops, expect); |
| 534 | } |
| 535 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 536 | #define TICK 500000 |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 537 | static bool wait_for_scan(const char *msg, char *p, int nr_hpages, |
| 538 | struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 539 | { |
| 540 | int full_scans; |
| 541 | int timeout = 6; /* 3 seconds */ |
| 542 | |
| 543 | /* Sanity check */ |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 544 | if (!ops->check_huge(p, 0)) { |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 545 | printf("Unexpected huge page\n"); |
| 546 | exit(EXIT_FAILURE); |
| 547 | } |
| 548 | |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 549 | madvise(p, nr_hpages * hpage_pmd_size, MADV_HUGEPAGE); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 550 | |
| 551 | /* Wait until the second full_scan completed */ |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 552 | full_scans = thp_read_num("khugepaged/full_scans") + 2; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 553 | |
| 554 | printf("%s...", msg); |
| 555 | while (timeout--) { |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 556 | if (ops->check_huge(p, nr_hpages)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 557 | break; |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 558 | if (thp_read_num("khugepaged/full_scans") >= full_scans) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 559 | break; |
| 560 | printf("."); |
| 561 | usleep(TICK); |
| 562 | } |
| 563 | |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 564 | madvise(p, nr_hpages * hpage_pmd_size, MADV_NOHUGEPAGE); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 565 | |
Dan Carpenter | 9f267a1 | 2020-06-10 18:41:22 -0700 | [diff] [blame] | 566 | return timeout == -1; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 567 | } |
| 568 | |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 569 | static void khugepaged_collapse(const char *msg, char *p, int nr_hpages, |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 570 | struct mem_ops *ops, bool expect) |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 571 | { |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 572 | if (wait_for_scan(msg, p, nr_hpages, ops)) { |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 573 | if (expect) |
| 574 | fail("Timeout"); |
| 575 | else |
| 576 | success("OK"); |
| 577 | return; |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 578 | } |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 579 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 580 | /* |
| 581 | * For file and shmem memory, khugepaged only retracts pte entries after |
| 582 | * putting the new hugepage in the page cache. The hugepage must be |
| 583 | * subsequently refaulted to install the pmd mapping for the mm. |
| 584 | */ |
| 585 | if (ops != &__anon_ops) |
| 586 | ops->fault(p, 0, nr_hpages * hpage_pmd_size); |
| 587 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 588 | if (ops->check_huge(p, expect ? nr_hpages : 0)) |
| 589 | success("OK"); |
| 590 | else |
| 591 | fail("Fail"); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 592 | } |
| 593 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 594 | static struct collapse_context __khugepaged_context = { |
| 595 | .collapse = &khugepaged_collapse, |
| 596 | .enforce_pte_scan_limits = true, |
| 597 | .name = "khugepaged", |
| 598 | }; |
| 599 | |
| 600 | static struct collapse_context __madvise_context = { |
| 601 | .collapse = &madvise_collapse, |
| 602 | .enforce_pte_scan_limits = false, |
| 603 | .name = "madvise", |
| 604 | }; |
| 605 | |
| 606 | static bool is_tmpfs(struct mem_ops *ops) |
| 607 | { |
| 608 | return ops == &__file_ops && finfo.type == VMA_SHMEM; |
| 609 | } |
| 610 | |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 611 | static bool is_anon(struct mem_ops *ops) |
| 612 | { |
| 613 | return ops == &__anon_ops; |
| 614 | } |
| 615 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 616 | static void alloc_at_fault(void) |
| 617 | { |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 618 | struct thp_settings settings = *thp_current_settings(); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 619 | char *p; |
| 620 | |
| 621 | settings.thp_enabled = THP_ALWAYS; |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 622 | thp_push_settings(&settings); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 623 | |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 624 | p = alloc_mapping(1); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 625 | *p = 1; |
| 626 | printf("Allocate huge page on fault..."); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 627 | if (check_huge_anon(p, 1, hpage_pmd_size)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 628 | success("OK"); |
| 629 | else |
| 630 | fail("Fail"); |
| 631 | |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 632 | thp_pop_settings(); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 633 | |
| 634 | madvise(p, page_size, MADV_DONTNEED); |
| 635 | printf("Split huge PMD on MADV_DONTNEED..."); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 636 | if (check_huge_anon(p, 0, hpage_pmd_size)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 637 | success("OK"); |
| 638 | else |
| 639 | fail("Fail"); |
| 640 | munmap(p, hpage_pmd_size); |
| 641 | } |
| 642 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 643 | static void collapse_full(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 644 | { |
| 645 | void *p; |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 646 | int nr_hpages = 4; |
| 647 | unsigned long size = nr_hpages * hpage_pmd_size; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 648 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 649 | p = ops->setup_area(nr_hpages); |
| 650 | ops->fault(p, 0, size); |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 651 | c->collapse("Collapse multiple fully populated PTE table", p, nr_hpages, |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 652 | ops, true); |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 653 | validate_memory(p, 0, size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 654 | ops->cleanup_area(p, size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 655 | } |
| 656 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 657 | static void collapse_empty(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 658 | { |
| 659 | void *p; |
| 660 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 661 | p = ops->setup_area(1); |
| 662 | c->collapse("Do not collapse empty PTE table", p, 1, ops, false); |
| 663 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 664 | } |
| 665 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 666 | static void collapse_single_pte_entry(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 667 | { |
| 668 | void *p; |
| 669 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 670 | p = ops->setup_area(1); |
| 671 | ops->fault(p, 0, page_size); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 672 | c->collapse("Collapse PTE table with single PTE entry present", p, |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 673 | 1, ops, true); |
| 674 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 675 | } |
| 676 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 677 | static void collapse_max_ptes_none(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 678 | { |
| 679 | int max_ptes_none = hpage_pmd_nr / 2; |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 680 | struct thp_settings settings = *thp_current_settings(); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 681 | void *p; |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 682 | int fault_nr_pages = is_anon(ops) ? 1 << anon_order : 1; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 683 | |
| 684 | settings.khugepaged.max_ptes_none = max_ptes_none; |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 685 | thp_push_settings(&settings); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 686 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 687 | p = ops->setup_area(1); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 688 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 689 | if (is_tmpfs(ops)) { |
| 690 | /* shmem pages always in the page cache */ |
| 691 | printf("tmpfs..."); |
| 692 | skip("Skip"); |
| 693 | goto skip; |
| 694 | } |
| 695 | |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 696 | ops->fault(p, 0, (hpage_pmd_nr - max_ptes_none - fault_nr_pages) * page_size); |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 697 | c->collapse("Maybe collapse with max_ptes_none exceeded", p, 1, |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 698 | ops, !c->enforce_pte_scan_limits); |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 699 | validate_memory(p, 0, (hpage_pmd_nr - max_ptes_none - fault_nr_pages) * page_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 700 | |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 701 | if (c->enforce_pte_scan_limits) { |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 702 | ops->fault(p, 0, (hpage_pmd_nr - max_ptes_none) * page_size); |
| 703 | c->collapse("Collapse with max_ptes_none PTEs empty", p, 1, ops, |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 704 | true); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 705 | validate_memory(p, 0, |
| 706 | (hpage_pmd_nr - max_ptes_none) * page_size); |
| 707 | } |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 708 | skip: |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 709 | ops->cleanup_area(p, hpage_pmd_size); |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 710 | thp_pop_settings(); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 711 | } |
| 712 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 713 | static void collapse_swapin_single_pte(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 714 | { |
| 715 | void *p; |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 716 | |
| 717 | p = ops->setup_area(1); |
| 718 | ops->fault(p, 0, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 719 | |
| 720 | printf("Swapout one page..."); |
| 721 | if (madvise(p, page_size, MADV_PAGEOUT)) { |
| 722 | perror("madvise(MADV_PAGEOUT)"); |
| 723 | exit(EXIT_FAILURE); |
| 724 | } |
| 725 | if (check_swap(p, page_size)) { |
| 726 | success("OK"); |
| 727 | } else { |
| 728 | fail("Fail"); |
| 729 | goto out; |
| 730 | } |
| 731 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 732 | c->collapse("Collapse with swapping in single PTE entry", p, 1, ops, |
| 733 | true); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 734 | validate_memory(p, 0, hpage_pmd_size); |
| 735 | out: |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 736 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 737 | } |
| 738 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 739 | static void collapse_max_ptes_swap(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 740 | { |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 741 | int max_ptes_swap = thp_read_num("khugepaged/max_ptes_swap"); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 742 | void *p; |
| 743 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 744 | p = ops->setup_area(1); |
| 745 | ops->fault(p, 0, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 746 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 747 | printf("Swapout %d of %d pages...", max_ptes_swap + 1, hpage_pmd_nr); |
| 748 | if (madvise(p, (max_ptes_swap + 1) * page_size, MADV_PAGEOUT)) { |
| 749 | perror("madvise(MADV_PAGEOUT)"); |
| 750 | exit(EXIT_FAILURE); |
| 751 | } |
| 752 | if (check_swap(p, (max_ptes_swap + 1) * page_size)) { |
| 753 | success("OK"); |
| 754 | } else { |
| 755 | fail("Fail"); |
| 756 | goto out; |
| 757 | } |
| 758 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 759 | c->collapse("Maybe collapse with max_ptes_swap exceeded", p, 1, ops, |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 760 | !c->enforce_pte_scan_limits); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 761 | validate_memory(p, 0, hpage_pmd_size); |
| 762 | |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 763 | if (c->enforce_pte_scan_limits) { |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 764 | ops->fault(p, 0, hpage_pmd_size); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 765 | printf("Swapout %d of %d pages...", max_ptes_swap, |
| 766 | hpage_pmd_nr); |
| 767 | if (madvise(p, max_ptes_swap * page_size, MADV_PAGEOUT)) { |
| 768 | perror("madvise(MADV_PAGEOUT)"); |
| 769 | exit(EXIT_FAILURE); |
| 770 | } |
| 771 | if (check_swap(p, max_ptes_swap * page_size)) { |
| 772 | success("OK"); |
| 773 | } else { |
| 774 | fail("Fail"); |
| 775 | goto out; |
| 776 | } |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 777 | |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 778 | c->collapse("Collapse with max_ptes_swap pages swapped out", p, |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 779 | 1, ops, true); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 780 | validate_memory(p, 0, hpage_pmd_size); |
| 781 | } |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 782 | out: |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 783 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 784 | } |
| 785 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 786 | static void collapse_single_pte_entry_compound(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 787 | { |
| 788 | void *p; |
| 789 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 790 | p = alloc_hpage(ops); |
| 791 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 792 | if (is_tmpfs(ops)) { |
| 793 | /* MADV_DONTNEED won't evict tmpfs pages */ |
| 794 | printf("tmpfs..."); |
| 795 | skip("Skip"); |
| 796 | goto skip; |
| 797 | } |
| 798 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 799 | madvise(p, hpage_pmd_size, MADV_NOHUGEPAGE); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 800 | printf("Split huge page leaving single PTE mapping compound page..."); |
| 801 | madvise(p + page_size, hpage_pmd_size - page_size, MADV_DONTNEED); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 802 | if (ops->check_huge(p, 0)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 803 | success("OK"); |
| 804 | else |
| 805 | fail("Fail"); |
| 806 | |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 807 | c->collapse("Collapse PTE table with single PTE mapping compound page", |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 808 | p, 1, ops, true); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 809 | validate_memory(p, 0, page_size); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 810 | skip: |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 811 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 812 | } |
| 813 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 814 | static void collapse_full_of_compound(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 815 | { |
| 816 | void *p; |
| 817 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 818 | p = alloc_hpage(ops); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 819 | printf("Split huge page leaving single PTE page table full of compound pages..."); |
| 820 | madvise(p, page_size, MADV_NOHUGEPAGE); |
| 821 | madvise(p, hpage_pmd_size, MADV_NOHUGEPAGE); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 822 | if (ops->check_huge(p, 0)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 823 | success("OK"); |
| 824 | else |
| 825 | fail("Fail"); |
| 826 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 827 | c->collapse("Collapse PTE table full of compound pages", p, 1, ops, |
| 828 | true); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 829 | validate_memory(p, 0, hpage_pmd_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 830 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 831 | } |
| 832 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 833 | static void collapse_compound_extreme(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 834 | { |
| 835 | void *p; |
| 836 | int i; |
| 837 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 838 | p = ops->setup_area(1); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 839 | for (i = 0; i < hpage_pmd_nr; i++) { |
| 840 | printf("\rConstruct PTE page table full of different PTE-mapped compound pages %3d/%d...", |
| 841 | i + 1, hpage_pmd_nr); |
| 842 | |
| 843 | madvise(BASE_ADDR, hpage_pmd_size, MADV_HUGEPAGE); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 844 | ops->fault(BASE_ADDR, 0, hpage_pmd_size); |
| 845 | if (!ops->check_huge(BASE_ADDR, 1)) { |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 846 | printf("Failed to allocate huge page\n"); |
| 847 | exit(EXIT_FAILURE); |
| 848 | } |
| 849 | madvise(BASE_ADDR, hpage_pmd_size, MADV_NOHUGEPAGE); |
| 850 | |
| 851 | p = mremap(BASE_ADDR - i * page_size, |
| 852 | i * page_size + hpage_pmd_size, |
| 853 | (i + 1) * page_size, |
| 854 | MREMAP_MAYMOVE | MREMAP_FIXED, |
| 855 | BASE_ADDR + 2 * hpage_pmd_size); |
| 856 | if (p == MAP_FAILED) { |
| 857 | perror("mremap+unmap"); |
| 858 | exit(EXIT_FAILURE); |
| 859 | } |
| 860 | |
| 861 | p = mremap(BASE_ADDR + 2 * hpage_pmd_size, |
| 862 | (i + 1) * page_size, |
| 863 | (i + 1) * page_size + hpage_pmd_size, |
| 864 | MREMAP_MAYMOVE | MREMAP_FIXED, |
| 865 | BASE_ADDR - (i + 1) * page_size); |
| 866 | if (p == MAP_FAILED) { |
| 867 | perror("mremap+alloc"); |
| 868 | exit(EXIT_FAILURE); |
| 869 | } |
| 870 | } |
| 871 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 872 | ops->cleanup_area(BASE_ADDR, hpage_pmd_size); |
| 873 | ops->fault(p, 0, hpage_pmd_size); |
| 874 | if (!ops->check_huge(p, 1)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 875 | success("OK"); |
| 876 | else |
| 877 | fail("Fail"); |
| 878 | |
Zach O'Keefe | 9d0d946 | 2022-07-06 16:59:36 -0700 | [diff] [blame] | 879 | c->collapse("Collapse PTE table full of different compound pages", p, 1, |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 880 | ops, true); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 881 | |
| 882 | validate_memory(p, 0, hpage_pmd_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 883 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 884 | } |
| 885 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 886 | static void collapse_fork(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 887 | { |
| 888 | int wstatus; |
| 889 | void *p; |
| 890 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 891 | p = ops->setup_area(1); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 892 | |
| 893 | printf("Allocate small page..."); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 894 | ops->fault(p, 0, page_size); |
| 895 | if (ops->check_huge(p, 0)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 896 | success("OK"); |
| 897 | else |
| 898 | fail("Fail"); |
| 899 | |
| 900 | printf("Share small page over fork()..."); |
| 901 | if (!fork()) { |
| 902 | /* Do not touch settings on child exit */ |
| 903 | skip_settings_restore = true; |
| 904 | exit_status = 0; |
| 905 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 906 | if (ops->check_huge(p, 0)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 907 | success("OK"); |
| 908 | else |
| 909 | fail("Fail"); |
| 910 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 911 | ops->fault(p, page_size, 2 * page_size); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 912 | c->collapse("Collapse PTE table with single page shared with parent process", |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 913 | p, 1, ops, true); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 914 | |
| 915 | validate_memory(p, 0, page_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 916 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 917 | exit(exit_status); |
| 918 | } |
| 919 | |
| 920 | wait(&wstatus); |
| 921 | exit_status += WEXITSTATUS(wstatus); |
| 922 | |
| 923 | printf("Check if parent still has small page..."); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 924 | if (ops->check_huge(p, 0)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 925 | success("OK"); |
| 926 | else |
| 927 | fail("Fail"); |
| 928 | validate_memory(p, 0, page_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 929 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 930 | } |
| 931 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 932 | static void collapse_fork_compound(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 933 | { |
| 934 | int wstatus; |
| 935 | void *p; |
| 936 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 937 | p = alloc_hpage(ops); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 938 | printf("Share huge page over fork()..."); |
| 939 | if (!fork()) { |
| 940 | /* Do not touch settings on child exit */ |
| 941 | skip_settings_restore = true; |
| 942 | exit_status = 0; |
| 943 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 944 | if (ops->check_huge(p, 1)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 945 | success("OK"); |
| 946 | else |
| 947 | fail("Fail"); |
| 948 | |
| 949 | printf("Split huge page PMD in child process..."); |
| 950 | madvise(p, page_size, MADV_NOHUGEPAGE); |
| 951 | madvise(p, hpage_pmd_size, MADV_NOHUGEPAGE); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 952 | if (ops->check_huge(p, 0)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 953 | success("OK"); |
| 954 | else |
| 955 | fail("Fail"); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 956 | ops->fault(p, 0, page_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 957 | |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 958 | thp_write_num("khugepaged/max_ptes_shared", hpage_pmd_nr - 1); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 959 | c->collapse("Collapse PTE table full of compound pages in child", |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 960 | p, 1, ops, true); |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 961 | thp_write_num("khugepaged/max_ptes_shared", |
| 962 | thp_current_settings()->khugepaged.max_ptes_shared); |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 963 | |
| 964 | validate_memory(p, 0, hpage_pmd_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 965 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 966 | exit(exit_status); |
| 967 | } |
| 968 | |
| 969 | wait(&wstatus); |
| 970 | exit_status += WEXITSTATUS(wstatus); |
| 971 | |
| 972 | printf("Check if parent still has huge page..."); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 973 | if (ops->check_huge(p, 1)) |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 974 | success("OK"); |
| 975 | else |
| 976 | fail("Fail"); |
| 977 | validate_memory(p, 0, hpage_pmd_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 978 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 979 | } |
| 980 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 981 | static void collapse_max_ptes_shared(struct collapse_context *c, struct mem_ops *ops) |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 982 | { |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 983 | int max_ptes_shared = thp_read_num("khugepaged/max_ptes_shared"); |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 984 | int wstatus; |
| 985 | void *p; |
| 986 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 987 | p = alloc_hpage(ops); |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 988 | printf("Share huge page over fork()..."); |
| 989 | if (!fork()) { |
| 990 | /* Do not touch settings on child exit */ |
| 991 | skip_settings_restore = true; |
| 992 | exit_status = 0; |
| 993 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 994 | if (ops->check_huge(p, 1)) |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 995 | success("OK"); |
| 996 | else |
| 997 | fail("Fail"); |
| 998 | |
| 999 | printf("Trigger CoW on page %d of %d...", |
| 1000 | hpage_pmd_nr - max_ptes_shared - 1, hpage_pmd_nr); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1001 | ops->fault(p, 0, (hpage_pmd_nr - max_ptes_shared - 1) * page_size); |
| 1002 | if (ops->check_huge(p, 0)) |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 1003 | success("OK"); |
| 1004 | else |
| 1005 | fail("Fail"); |
| 1006 | |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 1007 | c->collapse("Maybe collapse with max_ptes_shared exceeded", p, |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1008 | 1, ops, !c->enforce_pte_scan_limits); |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 1009 | |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 1010 | if (c->enforce_pte_scan_limits) { |
| 1011 | printf("Trigger CoW on page %d of %d...", |
| 1012 | hpage_pmd_nr - max_ptes_shared, hpage_pmd_nr); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1013 | ops->fault(p, 0, (hpage_pmd_nr - max_ptes_shared) * |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 1014 | page_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1015 | if (ops->check_huge(p, 0)) |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 1016 | success("OK"); |
| 1017 | else |
| 1018 | fail("Fail"); |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 1019 | |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 1020 | c->collapse("Collapse with max_ptes_shared PTEs shared", |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1021 | p, 1, ops, true); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 1022 | } |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1023 | |
| 1024 | validate_memory(p, 0, hpage_pmd_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1025 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1026 | exit(exit_status); |
| 1027 | } |
| 1028 | |
| 1029 | wait(&wstatus); |
| 1030 | exit_status += WEXITSTATUS(wstatus); |
| 1031 | |
| 1032 | printf("Check if parent still has huge page..."); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1033 | if (ops->check_huge(p, 1)) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1034 | success("OK"); |
| 1035 | else |
| 1036 | fail("Fail"); |
| 1037 | validate_memory(p, 0, hpage_pmd_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1038 | ops->cleanup_area(p, hpage_pmd_size); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1039 | } |
| 1040 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1041 | static void madvise_collapse_existing_thps(struct collapse_context *c, |
| 1042 | struct mem_ops *ops) |
Zach O'Keefe | 1370a21 | 2022-07-06 16:59:35 -0700 | [diff] [blame] | 1043 | { |
| 1044 | void *p; |
Zach O'Keefe | 1370a21 | 2022-07-06 16:59:35 -0700 | [diff] [blame] | 1045 | |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1046 | p = ops->setup_area(1); |
| 1047 | ops->fault(p, 0, hpage_pmd_size); |
| 1048 | c->collapse("Collapse fully populated PTE table...", p, 1, ops, true); |
Zach O'Keefe | 1370a21 | 2022-07-06 16:59:35 -0700 | [diff] [blame] | 1049 | validate_memory(p, 0, hpage_pmd_size); |
Zach O'Keefe | 8e63870 | 2022-09-22 15:40:42 -0700 | [diff] [blame] | 1050 | |
| 1051 | /* c->collapse() will find a hugepage and complain - call directly. */ |
| 1052 | __madvise_collapse("Re-collapse PMD-mapped hugepage", p, 1, ops, true); |
| 1053 | validate_memory(p, 0, hpage_pmd_size); |
| 1054 | ops->cleanup_area(p, hpage_pmd_size); |
Zach O'Keefe | 1370a21 | 2022-07-06 16:59:35 -0700 | [diff] [blame] | 1055 | } |
| 1056 | |
Zach O'Keefe | 69d9428c | 2022-09-22 15:40:45 -0700 | [diff] [blame] | 1057 | /* |
| 1058 | * Test race with khugepaged where page tables have been retracted and |
| 1059 | * pmd cleared. |
| 1060 | */ |
| 1061 | static void madvise_retracted_page_tables(struct collapse_context *c, |
| 1062 | struct mem_ops *ops) |
| 1063 | { |
| 1064 | void *p; |
| 1065 | int nr_hpages = 1; |
| 1066 | unsigned long size = nr_hpages * hpage_pmd_size; |
| 1067 | |
| 1068 | p = ops->setup_area(nr_hpages); |
| 1069 | ops->fault(p, 0, size); |
| 1070 | |
| 1071 | /* Let khugepaged collapse and leave pmd cleared */ |
| 1072 | if (wait_for_scan("Collapse and leave PMD cleared", p, nr_hpages, |
| 1073 | ops)) { |
| 1074 | fail("Timeout"); |
| 1075 | return; |
| 1076 | } |
| 1077 | success("OK"); |
| 1078 | c->collapse("Install huge PMD from page cache", p, nr_hpages, ops, |
| 1079 | true); |
| 1080 | validate_memory(p, 0, size); |
| 1081 | ops->cleanup_area(p, size); |
| 1082 | } |
| 1083 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1084 | static void usage(void) |
| 1085 | { |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1086 | fprintf(stderr, "\nUsage: ./khugepaged [OPTIONS] <test type> [dir]\n\n"); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1087 | fprintf(stderr, "\t<test type>\t: <context>:<mem_type>\n"); |
| 1088 | fprintf(stderr, "\t<context>\t: [all|khugepaged|madvise]\n"); |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1089 | fprintf(stderr, "\t<mem_type>\t: [all|anon|file|shmem]\n"); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1090 | fprintf(stderr, "\n\t\"file,all\" mem_type requires [dir] argument\n"); |
| 1091 | fprintf(stderr, "\n\t\"file,all\" mem_type requires kernel built with\n"); |
| 1092 | fprintf(stderr, "\tCONFIG_READ_ONLY_THP_FOR_FS=y\n"); |
| 1093 | fprintf(stderr, "\n\tif [dir] is a (sub)directory of a tmpfs mount, tmpfs must be\n"); |
| 1094 | fprintf(stderr, "\tmounted with huge=madvise option for khugepaged tests to work\n"); |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1095 | fprintf(stderr, "\n\tSupported Options:\n"); |
| 1096 | fprintf(stderr, "\t\t-h: This help message.\n"); |
| 1097 | fprintf(stderr, "\t\t-s: mTHP size, expressed as page order.\n"); |
| 1098 | fprintf(stderr, "\t\t Defaults to 0. Use this size for anon allocations.\n"); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1099 | exit(1); |
| 1100 | } |
| 1101 | |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1102 | static void parse_test_type(int argc, char **argv) |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1103 | { |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1104 | int opt; |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1105 | char *buf; |
| 1106 | const char *token; |
| 1107 | |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1108 | while ((opt = getopt(argc, argv, "s:h")) != -1) { |
| 1109 | switch (opt) { |
| 1110 | case 's': |
| 1111 | anon_order = atoi(optarg); |
| 1112 | break; |
| 1113 | case 'h': |
| 1114 | default: |
| 1115 | usage(); |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | argv += optind; |
| 1120 | argc -= optind; |
| 1121 | |
| 1122 | if (argc == 0) { |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1123 | /* Backwards compatibility */ |
| 1124 | khugepaged_context = &__khugepaged_context; |
| 1125 | madvise_context = &__madvise_context; |
| 1126 | anon_ops = &__anon_ops; |
| 1127 | return; |
| 1128 | } |
| 1129 | |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1130 | buf = strdup(argv[0]); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1131 | token = strsep(&buf, ":"); |
| 1132 | |
| 1133 | if (!strcmp(token, "all")) { |
| 1134 | khugepaged_context = &__khugepaged_context; |
| 1135 | madvise_context = &__madvise_context; |
| 1136 | } else if (!strcmp(token, "khugepaged")) { |
| 1137 | khugepaged_context = &__khugepaged_context; |
| 1138 | } else if (!strcmp(token, "madvise")) { |
| 1139 | madvise_context = &__madvise_context; |
| 1140 | } else { |
| 1141 | usage(); |
| 1142 | } |
| 1143 | |
| 1144 | if (!buf) |
| 1145 | usage(); |
| 1146 | |
| 1147 | if (!strcmp(buf, "all")) { |
| 1148 | file_ops = &__file_ops; |
| 1149 | anon_ops = &__anon_ops; |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1150 | shmem_ops = &__shmem_ops; |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1151 | } else if (!strcmp(buf, "anon")) { |
| 1152 | anon_ops = &__anon_ops; |
| 1153 | } else if (!strcmp(buf, "file")) { |
| 1154 | file_ops = &__file_ops; |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1155 | } else if (!strcmp(buf, "shmem")) { |
| 1156 | shmem_ops = &__shmem_ops; |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1157 | } else { |
| 1158 | usage(); |
| 1159 | } |
| 1160 | |
| 1161 | if (!file_ops) |
| 1162 | return; |
| 1163 | |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1164 | if (argc != 2) |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1165 | usage(); |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1166 | |
| 1167 | get_finfo(argv[1]); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1168 | } |
| 1169 | |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1170 | int main(int argc, char **argv) |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1171 | { |
Ryan Roberts | 4f5070a | 2023-12-07 16:12:08 +0000 | [diff] [blame] | 1172 | int hpage_pmd_order; |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 1173 | struct thp_settings default_settings = { |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 1174 | .thp_enabled = THP_MADVISE, |
| 1175 | .thp_defrag = THP_DEFRAG_ALWAYS, |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1176 | .shmem_enabled = SHMEM_ADVISE, |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 1177 | .use_zero_page = 0, |
| 1178 | .khugepaged = { |
| 1179 | .defrag = 1, |
| 1180 | .alloc_sleep_millisecs = 10, |
| 1181 | .scan_sleep_millisecs = 10, |
| 1182 | }, |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1183 | /* |
| 1184 | * When testing file-backed memory, the collapse path |
| 1185 | * looks at how many pages are found in the page cache, not |
| 1186 | * what pages are mapped. Disable read ahead optimization so |
| 1187 | * pages don't find their way into the page cache unless |
| 1188 | * we mem_ops->fault() them in. |
| 1189 | */ |
| 1190 | .read_ahead_kb = 0, |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 1191 | }; |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1192 | |
| 1193 | parse_test_type(argc, argv); |
| 1194 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1195 | setbuf(stdout, NULL); |
| 1196 | |
| 1197 | page_size = getpagesize(); |
Zach O'Keefe | c07c343 | 2022-09-22 15:40:41 -0700 | [diff] [blame] | 1198 | hpage_pmd_size = read_pmd_pagesize(); |
David Hildenbrand | d6e61af | 2023-04-11 16:25:07 +0200 | [diff] [blame] | 1199 | if (!hpage_pmd_size) { |
| 1200 | printf("Reading PMD pagesize failed"); |
| 1201 | exit(EXIT_FAILURE); |
| 1202 | } |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1203 | hpage_pmd_nr = hpage_pmd_size / page_size; |
Ryan Roberts | 4f5070a | 2023-12-07 16:12:08 +0000 | [diff] [blame] | 1204 | hpage_pmd_order = __builtin_ctz(hpage_pmd_nr); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1205 | |
| 1206 | default_settings.khugepaged.max_ptes_none = hpage_pmd_nr - 1; |
| 1207 | default_settings.khugepaged.max_ptes_swap = hpage_pmd_nr / 8; |
Kirill A. Shutemov | 71a2c11 | 2020-06-03 16:00:30 -0700 | [diff] [blame] | 1208 | default_settings.khugepaged.max_ptes_shared = hpage_pmd_nr / 2; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1209 | default_settings.khugepaged.pages_to_scan = hpage_pmd_nr * 8; |
Ryan Roberts | 4f5070a | 2023-12-07 16:12:08 +0000 | [diff] [blame] | 1210 | default_settings.hugepages[hpage_pmd_order].enabled = THP_INHERIT; |
Ryan Roberts | 9f0704e | 2023-12-07 16:12:09 +0000 | [diff] [blame] | 1211 | default_settings.hugepages[anon_order].enabled = THP_ALWAYS; |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1212 | |
| 1213 | save_settings(); |
Ryan Roberts | 00679a1 | 2023-12-07 16:12:07 +0000 | [diff] [blame] | 1214 | thp_push_settings(&default_settings); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1215 | |
| 1216 | alloc_at_fault(); |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 1217 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1218 | #define TEST(t, c, o) do { \ |
| 1219 | if (c && o) { \ |
| 1220 | printf("\nRun test: " #t " (%s:%s)\n", c->name, o->name); \ |
| 1221 | t(c, o); \ |
| 1222 | } \ |
| 1223 | } while (0) |
Zach O'Keefe | 61c2c67 | 2022-07-06 16:59:32 -0700 | [diff] [blame] | 1224 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1225 | TEST(collapse_full, khugepaged_context, anon_ops); |
| 1226 | TEST(collapse_full, khugepaged_context, file_ops); |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1227 | TEST(collapse_full, khugepaged_context, shmem_ops); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1228 | TEST(collapse_full, madvise_context, anon_ops); |
| 1229 | TEST(collapse_full, madvise_context, file_ops); |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1230 | TEST(collapse_full, madvise_context, shmem_ops); |
Zach O'Keefe | 9330694 | 2022-07-06 16:59:34 -0700 | [diff] [blame] | 1231 | |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1232 | TEST(collapse_empty, khugepaged_context, anon_ops); |
| 1233 | TEST(collapse_empty, madvise_context, anon_ops); |
| 1234 | |
| 1235 | TEST(collapse_single_pte_entry, khugepaged_context, anon_ops); |
| 1236 | TEST(collapse_single_pte_entry, khugepaged_context, file_ops); |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1237 | TEST(collapse_single_pte_entry, khugepaged_context, shmem_ops); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1238 | TEST(collapse_single_pte_entry, madvise_context, anon_ops); |
| 1239 | TEST(collapse_single_pte_entry, madvise_context, file_ops); |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1240 | TEST(collapse_single_pte_entry, madvise_context, shmem_ops); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1241 | |
| 1242 | TEST(collapse_max_ptes_none, khugepaged_context, anon_ops); |
| 1243 | TEST(collapse_max_ptes_none, khugepaged_context, file_ops); |
| 1244 | TEST(collapse_max_ptes_none, madvise_context, anon_ops); |
| 1245 | TEST(collapse_max_ptes_none, madvise_context, file_ops); |
| 1246 | |
| 1247 | TEST(collapse_single_pte_entry_compound, khugepaged_context, anon_ops); |
| 1248 | TEST(collapse_single_pte_entry_compound, khugepaged_context, file_ops); |
| 1249 | TEST(collapse_single_pte_entry_compound, madvise_context, anon_ops); |
| 1250 | TEST(collapse_single_pte_entry_compound, madvise_context, file_ops); |
| 1251 | |
| 1252 | TEST(collapse_full_of_compound, khugepaged_context, anon_ops); |
| 1253 | TEST(collapse_full_of_compound, khugepaged_context, file_ops); |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1254 | TEST(collapse_full_of_compound, khugepaged_context, shmem_ops); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1255 | TEST(collapse_full_of_compound, madvise_context, anon_ops); |
| 1256 | TEST(collapse_full_of_compound, madvise_context, file_ops); |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1257 | TEST(collapse_full_of_compound, madvise_context, shmem_ops); |
Zach O'Keefe | 1b03d0d | 2022-09-22 15:40:43 -0700 | [diff] [blame] | 1258 | |
| 1259 | TEST(collapse_compound_extreme, khugepaged_context, anon_ops); |
| 1260 | TEST(collapse_compound_extreme, madvise_context, anon_ops); |
| 1261 | |
| 1262 | TEST(collapse_swapin_single_pte, khugepaged_context, anon_ops); |
| 1263 | TEST(collapse_swapin_single_pte, madvise_context, anon_ops); |
| 1264 | |
| 1265 | TEST(collapse_max_ptes_swap, khugepaged_context, anon_ops); |
| 1266 | TEST(collapse_max_ptes_swap, madvise_context, anon_ops); |
| 1267 | |
| 1268 | TEST(collapse_fork, khugepaged_context, anon_ops); |
| 1269 | TEST(collapse_fork, madvise_context, anon_ops); |
| 1270 | |
| 1271 | TEST(collapse_fork_compound, khugepaged_context, anon_ops); |
| 1272 | TEST(collapse_fork_compound, madvise_context, anon_ops); |
| 1273 | |
| 1274 | TEST(collapse_max_ptes_shared, khugepaged_context, anon_ops); |
| 1275 | TEST(collapse_max_ptes_shared, madvise_context, anon_ops); |
| 1276 | |
| 1277 | TEST(madvise_collapse_existing_thps, madvise_context, anon_ops); |
| 1278 | TEST(madvise_collapse_existing_thps, madvise_context, file_ops); |
Zach O'Keefe | d0d35b6 | 2022-09-22 15:40:44 -0700 | [diff] [blame] | 1279 | TEST(madvise_collapse_existing_thps, madvise_context, shmem_ops); |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1280 | |
Zach O'Keefe | 69d9428c | 2022-09-22 15:40:45 -0700 | [diff] [blame] | 1281 | TEST(madvise_retracted_page_tables, madvise_context, file_ops); |
| 1282 | TEST(madvise_retracted_page_tables, madvise_context, shmem_ops); |
| 1283 | |
Kirill A. Shutemov | e0c13f9 | 2020-06-03 16:00:06 -0700 | [diff] [blame] | 1284 | restore_settings(0); |
| 1285 | } |