lib/eal/linux/eal_hugepage_info.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <string.h>
   6 #include <sys/types.h>
   7 #include <sys/file.h>
   8 #include <dirent.h>
   9 #include <fcntl.h>
  10 #include <stdint.h>
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <fnmatch.h>
  14 #include <inttypes.h>
  15 #include <stdarg.h>
  16 #include <unistd.h>
  17 #include <errno.h>
  18 #include <sys/mman.h>
  19 #include <sys/queue.h>
  20 #include <sys/stat.h>
  21
  22 #include <linux/mman.h> /* for hugetlb-related flags */
  23
  24 #include <rte_memory.h>
  25 #include <rte_eal.h>
  26 #include <rte_launch.h>
  27 #include <rte_per_lcore.h>
  28 #include <rte_lcore.h>
  29 #include <rte_debug.h>
  30 #include <rte_log.h>
  31 #include <rte_common.h>
  32 #include "rte_string_fns.h"
  33
  34 #include "eal_private.h"
  35 #include "eal_internal_cfg.h"
  36 #include "eal_hugepages.h"
  37 #include "eal_filesystem.h"
  38
  39 static const char sys_dir_path[] = "/sys/kernel/mm/hugepages";
  40 static const char sys_pages_numa_dir_path[] = "/sys/devices/system/node";
  41
  42 /*
  43  * Uses mmap to create a shared memory area for storage of data
  44  * Used in this file to store the hugepage file map on disk
  45  */
  46 static void *
  47 map_shared_memory(const char *filename, const size_t mem_size, int flags)
  48 {
  49         void *retval;
  50         int fd = open(filename, flags, 0600);
  51         if (fd < 0)
  52                 return NULL;
  53         if (ftruncate(fd, mem_size) < 0) {
  54                 close(fd);
  55                 return NULL;
  56         }
  57         retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE,
  58                         MAP_SHARED, fd, 0);
  59         close(fd);
  60         return retval;
  61 }
  62
  63 static void *
  64 open_shared_memory(const char *filename, const size_t mem_size)
  65 {
  66         return map_shared_memory(filename, mem_size, O_RDWR);
  67 }
  68
  69 static void *
  70 create_shared_memory(const char *filename, const size_t mem_size)
  71 {
  72         return map_shared_memory(filename, mem_size, O_RDWR | O_CREAT);
  73 }
  74
  75 static int get_hp_sysfs_value(const char *subdir, const char *file, unsigned long *val)
  76 {
  77         char path[PATH_MAX];
  78
  79         snprintf(path, sizeof(path), "%s/%s/%s",
  80                         sys_dir_path, subdir, file);
  81         return eal_parse_sysfs_value(path, val);
  82 }
  83
  84 /* this function is only called from eal_hugepage_info_init which itself
  85  * is only called from a primary process */
  86 static uint32_t
  87 get_num_hugepages(const char *subdir, size_t sz, unsigned int reusable_pages)
  88 {
  89         unsigned long resv_pages, num_pages, over_pages, surplus_pages;
  90         const char *nr_hp_file = "free_hugepages";
  91         const char *nr_rsvd_file = "resv_hugepages";
  92         const char *nr_over_file = "nr_overcommit_hugepages";
  93         const char *nr_splus_file = "surplus_hugepages";
  94
  95         /* first, check how many reserved pages kernel reports */
  96         if (get_hp_sysfs_value(subdir, nr_rsvd_file, &resv_pages) < 0)
  97                 return 0;
  98
  99         if (get_hp_sysfs_value(subdir, nr_hp_file, &num_pages) < 0)
 100                 return 0;
 101
 102         if (get_hp_sysfs_value(subdir, nr_over_file, &over_pages) < 0)
 103                 over_pages = 0;
 104
 105         if (get_hp_sysfs_value(subdir, nr_splus_file, &surplus_pages) < 0)
 106                 surplus_pages = 0;
 107
 108         /* adjust num_pages */
 109         if (num_pages >= resv_pages)
 110                 num_pages -= resv_pages;
 111         else if (resv_pages)
 112                 num_pages = 0;
 113
 114         if (over_pages >= surplus_pages)
 115                 over_pages -= surplus_pages;
 116         else
 117                 over_pages = 0;
 118
 119         if (num_pages == 0 && over_pages == 0 && reusable_pages)
 120                 RTE_LOG(WARNING, EAL, "No available %zu kB hugepages reported\n",
 121                                 sz >> 10);
 122
 123         num_pages += over_pages;
 124         if (num_pages < over_pages) /* overflow */
 125                 num_pages = UINT32_MAX;
 126
 127         num_pages += reusable_pages;
 128         if (num_pages < reusable_pages) /* overflow */
 129                 num_pages = UINT32_MAX;
 130
 131         /* we want to return a uint32_t and more than this looks suspicious
 132          * anyway ... */
 133         if (num_pages > UINT32_MAX)
 134                 num_pages = UINT32_MAX;
 135
 136         return num_pages;
 137 }
 138
 139 static uint32_t
 140 get_num_hugepages_on_node(const char *subdir, unsigned int socket, size_t sz)
 141 {
 142         char path[PATH_MAX], socketpath[PATH_MAX];
 143         DIR *socketdir;
 144         unsigned long num_pages = 0;
 145         const char *nr_hp_file = "free_hugepages";
 146
 147         snprintf(socketpath, sizeof(socketpath), "%s/node%u/hugepages",
 148                 sys_pages_numa_dir_path, socket);
 149
 150         socketdir = opendir(socketpath);
 151         if (socketdir) {
 152                 /* Keep calm and carry on */
 153                 closedir(socketdir);
 154         } else {
 155                 /* Can't find socket dir, so ignore it */
 156                 return 0;
 157         }
 158
 159         snprintf(path, sizeof(path), "%s/%s/%s",
 160                         socketpath, subdir, nr_hp_file);
 161         if (eal_parse_sysfs_value(path, &num_pages) < 0)
 162                 return 0;
 163
 164         if (num_pages == 0)
 165                 RTE_LOG(WARNING, EAL, "No free %zu kB hugepages reported on node %u\n",
 166                                 sz >> 10, socket);
 167
 168         /*
 169          * we want to return a uint32_t and more than this looks suspicious
 170          * anyway ...
 171          */
 172         if (num_pages > UINT32_MAX)
 173                 num_pages = UINT32_MAX;
 174
 175         return num_pages;
 176 }
 177
 178 static uint64_t
 179 get_default_hp_size(void)
 180 {
 181         const char proc_meminfo[] = "/proc/meminfo";
 182         const char str_hugepagesz[] = "Hugepagesize:";
 183         unsigned hugepagesz_len = sizeof(str_hugepagesz) - 1;
 184         char buffer[256];
 185         unsigned long long size = 0;
 186
 187         FILE *fd = fopen(proc_meminfo, "r");
 188         if (fd == NULL)
 189                 rte_panic("Cannot open %s\n", proc_meminfo);
 190         while(fgets(buffer, sizeof(buffer), fd)){
 191                 if (strncmp(buffer, str_hugepagesz, hugepagesz_len) == 0){
 192                         size = rte_str_to_size(&buffer[hugepagesz_len]);
 193                         break;
 194                 }
 195         }
 196         fclose(fd);
 197         if (size == 0)
 198                 rte_panic("Cannot get default hugepage size from %s\n", proc_meminfo);
 199         return size;
 200 }
 201
 202 static int
 203 get_hugepage_dir(uint64_t hugepage_sz, char *hugedir, int len)
 204 {
 205         enum proc_mount_fieldnames {
 206                 DEVICE = 0,
 207                 MOUNTPT,
 208                 FSTYPE,
 209                 OPTIONS,
 210                 _FIELDNAME_MAX
 211         };
 212         static uint64_t default_size = 0;
 213         const char proc_mounts[] = "/proc/mounts";
 214         const char hugetlbfs_str[] = "hugetlbfs";
 215         const size_t htlbfs_str_len = sizeof(hugetlbfs_str) - 1;
 216         const char pagesize_opt[] = "pagesize=";
 217         const size_t pagesize_opt_len = sizeof(pagesize_opt) - 1;
 218         const char split_tok = ' ';
 219         char *splitstr[_FIELDNAME_MAX];
 220         char found[PATH_MAX] = "";
 221         char buf[BUFSIZ];
 222         const struct internal_config *internal_conf =
 223                 eal_get_internal_configuration();
 224         struct stat st;
 225
 226         /*
 227          * If the specified dir doesn't exist, we can't match it.
 228          */
 229         if (internal_conf->hugepage_dir != NULL &&
 230                 stat(internal_conf->hugepage_dir, &st) != 0) {
 231                 return -1;
 232         }
 233
 234         FILE *fd = fopen(proc_mounts, "r");
 235         if (fd == NULL)
 236                 rte_panic("Cannot open %s\n", proc_mounts);
 237
 238         if (default_size == 0)
 239                 default_size = get_default_hp_size();
 240
 241         while (fgets(buf, sizeof(buf), fd)){
 242                 const char *pagesz_str;
 243
 244                 if (rte_strsplit(buf, sizeof(buf), splitstr, _FIELDNAME_MAX,
 245                                 split_tok) != _FIELDNAME_MAX) {
 246                         RTE_LOG(ERR, EAL, "Error parsing %s\n", proc_mounts);
 247                         break; /* return NULL */
 248                 }
 249
 250                 if (strncmp(splitstr[FSTYPE], hugetlbfs_str, htlbfs_str_len) != 0)
 251                         continue;
 252
 253                 pagesz_str = strstr(splitstr[OPTIONS], pagesize_opt);
 254
 255                 /* if no explicit page size, the default page size is compared */
 256                 if (pagesz_str == NULL) {
 257                         if (hugepage_sz != default_size)
 258                                 continue;
 259                 }
 260                 /* there is an explicit page size, so check it */
 261                 else {
 262                         uint64_t pagesz = rte_str_to_size(&pagesz_str[pagesize_opt_len]);
 263                         if (pagesz != hugepage_sz)
 264                                 continue;
 265                 }
 266
 267                 /*
 268                  * If no --huge-dir option has been given, we're done.
 269                  */
 270                 if (internal_conf->hugepage_dir == NULL) {
 271                         strlcpy(found, splitstr[MOUNTPT], len);
 272                         break;
 273                 }
 274
 275                 /*
 276                  * Ignore any mount that doesn't contain the --huge-dir
 277                  * directory.
 278                  */
 279                 if (strncmp(internal_conf->hugepage_dir, splitstr[MOUNTPT],
 280                         strlen(splitstr[MOUNTPT])) != 0) {
 281                         continue;
 282                 }
 283
 284                 /*
 285                  * We found a match, but only prefer it if it's a longer match
 286                  * (so /mnt/1 is preferred over /mnt for matching /mnt/1/2)).
 287                  */
 288                 if (strlen(splitstr[MOUNTPT]) > strlen(found))
 289                         strlcpy(found, splitstr[MOUNTPT], len);
 290         } /* end while fgets */
 291
 292         fclose(fd);
 293
 294         if (found[0] != '\0') {
 295                 /* If needed, return the requested dir, not the mount point. */
 296                 strlcpy(hugedir, internal_conf->hugepage_dir != NULL ?
 297                         internal_conf->hugepage_dir : found, len);
 298                 return 0;
 299         }
 300
 301         return -1;
 302 }
 303
 304 struct walk_hugedir_data {
 305         int dir_fd;
 306         int file_fd;
 307         const char *file_name;
 308         void *user_data;
 309 };
 310
 311 typedef void (walk_hugedir_t)(const struct walk_hugedir_data *whd);
 312
 313 /*
 314  * Search the hugepage directory for whatever hugepage files there are.
 315  * Check if the file is in use by another DPDK process.
 316  * If not, execute a callback on it.
 317  */
 318 static int
 319 walk_hugedir(const char *hugedir, walk_hugedir_t *cb, void *user_data)
 320 {
 321         DIR *dir;
 322         struct dirent *dirent;
 323         int dir_fd, fd, lck_result;
 324         const char filter[] = "*map_*"; /* matches hugepage files */
 325
 326         dir = opendir(hugedir);
 327         if (!dir) {
 328                 RTE_LOG(ERR, EAL, "Unable to open hugepage directory %s\n",
 329                                 hugedir);
 330                 goto error;
 331         }
 332         dir_fd = dirfd(dir);
 333
 334         dirent = readdir(dir);
 335         if (!dirent) {
 336                 RTE_LOG(ERR, EAL, "Unable to read hugepage directory %s\n",
 337                                 hugedir);
 338                 goto error;
 339         }
 340
 341         while (dirent != NULL) {
 342                 /* skip files that don't match the hugepage pattern */
 343                 if (fnmatch(filter, dirent->d_name, 0) > 0) {
 344                         dirent = readdir(dir);
 345                         continue;
 346                 }
 347
 348                 /* try and lock the file */
 349                 fd = openat(dir_fd, dirent->d_name, O_RDONLY);
 350
 351                 /* skip to next file */
 352                 if (fd == -1) {
 353                         dirent = readdir(dir);
 354                         continue;
 355                 }
 356
 357                 /* non-blocking lock */
 358                 lck_result = flock(fd, LOCK_EX | LOCK_NB);
 359
 360                 /* if lock succeeds, execute callback */
 361                 if (lck_result != -1)
 362                         cb(&(struct walk_hugedir_data){
 363                                 .dir_fd = dir_fd,
 364                                 .file_fd = fd,
 365                                 .file_name = dirent->d_name,
 366                                 .user_data = user_data,
 367                         });
 368
 369                 close (fd);
 370                 dirent = readdir(dir);
 371         }
 372
 373         closedir(dir);
 374         return 0;
 375
 376 error:
 377         if (dir)
 378                 closedir(dir);
 379
 380         RTE_LOG(ERR, EAL, "Error while walking hugepage dir: %s\n",
 381                 strerror(errno));
 382
 383         return -1;
 384 }
 385
 386 static void
 387 clear_hugedir_cb(const struct walk_hugedir_data *whd)
 388 {
 389         unlinkat(whd->dir_fd, whd->file_name, 0);
 390 }
 391
 392 /* Remove hugepage files not used by other DPDK processes from a directory. */
 393 static int
 394 clear_hugedir(const char *hugedir)
 395 {
 396         return walk_hugedir(hugedir, clear_hugedir_cb, NULL);
 397 }
 398
 399 static void
 400 inspect_hugedir_cb(const struct walk_hugedir_data *whd)
 401 {
 402         uint64_t *total_size = whd->user_data;
 403         struct stat st;
 404
 405         if (fstat(whd->file_fd, &st) < 0)
 406                 RTE_LOG(DEBUG, EAL, "%s(): stat(\"%s\") failed: %s",
 407                                 __func__, whd->file_name, strerror(errno));
 408         else
 409                 (*total_size) += st.st_size;
 410 }
 411
 412 /*
 413  * Count the total size in bytes of all files in the directory
 414  * not mapped by other DPDK process.
 415  */
 416 static int
 417 inspect_hugedir(const char *hugedir, uint64_t *total_size)
 418 {
 419         return walk_hugedir(hugedir, inspect_hugedir_cb, total_size);
 420 }
 421
 422 static int
 423 compare_hpi(const void *a, const void *b)
 424 {
 425         const struct hugepage_info *hpi_a = a;
 426         const struct hugepage_info *hpi_b = b;
 427
 428         return hpi_b->hugepage_sz - hpi_a->hugepage_sz;
 429 }
 430
 431 static void
 432 calc_num_pages(struct hugepage_info *hpi, struct dirent *dirent,
 433                 unsigned int reusable_pages)
 434 {
 435         uint64_t total_pages = 0;
 436         unsigned int i;
 437         const struct internal_config *internal_conf =
 438                 eal_get_internal_configuration();
 439
 440         /*
 441          * first, try to put all hugepages into relevant sockets, but
 442          * if first attempts fails, fall back to collecting all pages
 443          * in one socket and sorting them later
 444          */
 445         total_pages = 0;
 446
 447         /*
 448          * We also don't want to do this for legacy init.
 449          * When there are hugepage files to reuse it is unknown
 450          * what NUMA node the pages are on.
 451          * This could be determined by mapping,
 452          * but it is precisely what hugepage file reuse is trying to avoid.
 453          */
 454         if (!internal_conf->legacy_mem && reusable_pages == 0)
 455                 for (i = 0; i < rte_socket_count(); i++) {
 456                         int socket = rte_socket_id_by_idx(i);
 457                         unsigned int num_pages =
 458                                         get_num_hugepages_on_node(
 459                                                 dirent->d_name, socket,
 460                                                 hpi->hugepage_sz);
 461                         hpi->num_pages[socket] = num_pages;
 462                         total_pages += num_pages;
 463                 }
 464         /*
 465          * we failed to sort memory from the get go, so fall
 466          * back to old way
 467          */
 468         if (total_pages == 0) {
 469                 hpi->num_pages[0] = get_num_hugepages(dirent->d_name,
 470                                 hpi->hugepage_sz, reusable_pages);
 471
 472 #ifndef RTE_ARCH_64
 473                 /* for 32-bit systems, limit number of hugepages to
 474                  * 1GB per page size */
 475                 hpi->num_pages[0] = RTE_MIN(hpi->num_pages[0],
 476                                 RTE_PGSIZE_1G / hpi->hugepage_sz);
 477 #endif
 478         }
 479 }
 480
 481 static int
 482 hugepage_info_init(void)
 483 {       const char dirent_start_text[] = "hugepages-";
 484         const size_t dirent_start_len = sizeof(dirent_start_text) - 1;
 485         unsigned int i, num_sizes = 0;
 486         uint64_t reusable_bytes;
 487         unsigned int reusable_pages;
 488         DIR *dir;
 489         struct dirent *dirent;
 490         struct internal_config *internal_conf =
 491                 eal_get_internal_configuration();
 492
 493         dir = opendir(sys_dir_path);
 494         if (dir == NULL) {
 495                 RTE_LOG(ERR, EAL,
 496                         "Cannot open directory %s to read system hugepage info\n",
 497                         sys_dir_path);
 498                 return -1;
 499         }
 500
 501         for (dirent = readdir(dir); dirent != NULL; dirent = readdir(dir)) {
 502                 struct hugepage_info *hpi;
 503
 504                 if (strncmp(dirent->d_name, dirent_start_text,
 505                             dirent_start_len) != 0)
 506                         continue;
 507
 508                 if (num_sizes >= MAX_HUGEPAGE_SIZES)
 509                         break;
 510
 511                 hpi = &internal_conf->hugepage_info[num_sizes];
 512                 hpi->hugepage_sz =
 513                         rte_str_to_size(&dirent->d_name[dirent_start_len]);
 514
 515                 /* first, check if we have a mountpoint */
 516                 if (get_hugepage_dir(hpi->hugepage_sz,
 517                         hpi->hugedir, sizeof(hpi->hugedir)) < 0) {
 518                         uint32_t num_pages;
 519
 520                         num_pages = get_num_hugepages(dirent->d_name,
 521                                         hpi->hugepage_sz, 0);
 522                         if (num_pages > 0)
 523                                 RTE_LOG(NOTICE, EAL,
 524                                         "%" PRIu32 " hugepages of size "
 525                                         "%" PRIu64 " reserved, but no mounted "
 526                                         "hugetlbfs found for that size\n",
 527                                         num_pages, hpi->hugepage_sz);
 528                         /* if we have kernel support for reserving hugepages
 529                          * through mmap, and we're in in-memory mode, treat this
 530                          * page size as valid. we cannot be in legacy mode at
 531                          * this point because we've checked this earlier in the
 532                          * init process.
 533                          */
 534 #ifdef MAP_HUGE_SHIFT
 535                         if (internal_conf->in_memory) {
 536                                 RTE_LOG(DEBUG, EAL, "In-memory mode enabled, "
 537                                         "hugepages of size %" PRIu64 " bytes "
 538                                         "will be allocated anonymously\n",
 539                                         hpi->hugepage_sz);
 540                                 calc_num_pages(hpi, dirent, 0);
 541                                 num_sizes++;
 542                         }
 543 #endif
 544                         continue;
 545                 }
 546
 547                 /* try to obtain a writelock */
 548                 hpi->lock_descriptor = open(hpi->hugedir, O_RDONLY);
 549
 550                 /* if blocking lock failed */
 551                 if (flock(hpi->lock_descriptor, LOCK_EX) == -1) {
 552                         RTE_LOG(CRIT, EAL,
 553                                 "Failed to lock hugepage directory!\n");
 554                         break;
 555                 }
 556
 557                 /*
 558                  * Check for existing hugepage files and either remove them
 559                  * or count how many of them can be reused.
 560                  */
 561                 reusable_pages = 0;
 562                 if (!internal_conf->hugepage_file.unlink_existing) {
 563                         reusable_bytes = 0;
 564                         if (inspect_hugedir(hpi->hugedir,
 565                                         &reusable_bytes) < 0)
 566                                 break;
 567                         RTE_ASSERT(reusable_bytes % hpi->hugepage_sz == 0);
 568                         reusable_pages = reusable_bytes / hpi->hugepage_sz;
 569                 } else if (clear_hugedir(hpi->hugedir) < 0) {
 570                         break;
 571                 }
 572                 calc_num_pages(hpi, dirent, reusable_pages);
 573
 574                 num_sizes++;
 575         }
 576         closedir(dir);
 577
 578         /* something went wrong, and we broke from the for loop above */
 579         if (dirent != NULL)
 580                 return -1;
 581
 582         internal_conf->num_hugepage_sizes = num_sizes;
 583
 584         /* sort the page directory entries by size, largest to smallest */
 585         qsort(&internal_conf->hugepage_info[0], num_sizes,
 586               sizeof(internal_conf->hugepage_info[0]), compare_hpi);
 587
 588         /* now we have all info, check we have at least one valid size */
 589         for (i = 0; i < num_sizes; i++) {
 590                 /* pages may no longer all be on socket 0, so check all */
 591                 unsigned int j, num_pages = 0;
 592                 struct hugepage_info *hpi = &internal_conf->hugepage_info[i];
 593
 594                 for (j = 0; j < RTE_MAX_NUMA_NODES; j++)
 595                         num_pages += hpi->num_pages[j];
 596                 if (num_pages > 0)
 597                         return 0;
 598         }
 599
 600         /* no valid hugepage mounts available, return error */
 601         return -1;
 602 }
 603
 604 /*
 605  * when we initialize the hugepage info, everything goes
 606  * to socket 0 by default. it will later get sorted by memory
 607  * initialization procedure.
 608  */
 609 int
 610 eal_hugepage_info_init(void)
 611 {
 612         struct hugepage_info *hpi, *tmp_hpi;
 613         unsigned int i;
 614         struct internal_config *internal_conf =
 615                 eal_get_internal_configuration();
 616
 617         if (hugepage_info_init() < 0)
 618                 return -1;
 619
 620         /* for no shared files mode, we're done */
 621         if (internal_conf->no_shconf)
 622                 return 0;
 623
 624         hpi = &internal_conf->hugepage_info[0];
 625
 626         tmp_hpi = create_shared_memory(eal_hugepage_info_path(),
 627                         sizeof(internal_conf->hugepage_info));
 628         if (tmp_hpi == NULL) {
 629                 RTE_LOG(ERR, EAL, "Failed to create shared memory!\n");
 630                 return -1;
 631         }
 632
 633         memcpy(tmp_hpi, hpi, sizeof(internal_conf->hugepage_info));
 634
 635         /* we've copied file descriptors along with everything else, but they
 636          * will be invalid in secondary process, so overwrite them
 637          */
 638         for (i = 0; i < RTE_DIM(internal_conf->hugepage_info); i++) {
 639                 struct hugepage_info *tmp = &tmp_hpi[i];
 640                 tmp->lock_descriptor = -1;
 641         }
 642
 643         if (munmap(tmp_hpi, sizeof(internal_conf->hugepage_info)) < 0) {
 644                 RTE_LOG(ERR, EAL, "Failed to unmap shared memory!\n");
 645                 return -1;
 646         }
 647         return 0;
 648 }
 649
 650 int eal_hugepage_info_read(void)
 651 {
 652         struct internal_config *internal_conf =
 653                 eal_get_internal_configuration();
 654         struct hugepage_info *hpi = &internal_conf->hugepage_info[0];
 655         struct hugepage_info *tmp_hpi;
 656
 657         tmp_hpi = open_shared_memory(eal_hugepage_info_path(),
 658                                   sizeof(internal_conf->hugepage_info));
 659         if (tmp_hpi == NULL) {
 660                 RTE_LOG(ERR, EAL, "Failed to open shared memory!\n");
 661                 return -1;
 662         }
 663
 664         memcpy(hpi, tmp_hpi, sizeof(internal_conf->hugepage_info));
 665
 666         if (munmap(tmp_hpi, sizeof(internal_conf->hugepage_info)) < 0) {
 667                 RTE_LOG(ERR, EAL, "Failed to unmap shared memory!\n");
 668                 return -1;
 669         }
 670         return 0;
 671 }