- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- long unsigned num_pages = 0;
- const char *nr_hp_file;
-
- /* if secondary process, just look at the number of hugepages,
- * otherwise look at number of free hugepages */
- if (internal_config.process_type == RTE_PROC_SECONDARY)
- nr_hp_file = "nr_hugepages";
- else
- nr_hp_file = "free_hugepages";
+ long unsigned resv_pages, num_pages = 0;
+ const char *nr_hp_file = "free_hugepages";
+ const char *nr_rsvd_file = "resv_hugepages";
+
+ /* first, check how many reserved pages kernel reports */
+ snprintf(path, sizeof(path), "%s/%s/%s",
+ sys_dir_path, subdir, nr_rsvd_file);
+ if (eal_parse_sysfs_value(path, &resv_pages) < 0)
+ return 0;
- rte_snprintf(path, sizeof(path), "%s/%s/%s",
+ snprintf(path, sizeof(path), "%s/%s/%s",
- RTE_LOG(ERR, EAL, "Error - no free hugepages available!\n");
+ RTE_LOG(WARNING, EAL, "No free hugepages reported in %s\n",
+ subdir);
- return (int32_t)num_pages;
+ /* adjust num_pages */
+ if (num_pages >= resv_pages)
+ num_pages -= resv_pages;
+ else if (resv_pages)
+ num_pages = 0;
+
+ /* we want to return a uint32_t and more than this looks suspicious
+ * anyway ... */
+ if (num_pages > UINT32_MAX)
+ num_pages = UINT32_MAX;
+
+ return num_pages;
const char dirent_start_text[] = "hugepages-";
const size_t dirent_start_len = sizeof(dirent_start_text) - 1;
unsigned i, num_sizes = 0;
const char dirent_start_text[] = "hugepages-";
const size_t dirent_start_len = sizeof(dirent_start_text) - 1;
unsigned i, num_sizes = 0;
- struct dirent *dirent = readdir(dir);
- while(dirent != NULL){
- if (strncmp(dirent->d_name, dirent_start_text, dirent_start_len) == 0){
- struct hugepage_info *hpi = \
- &internal_config.hugepage_info[num_sizes];
+ for (dirent = readdir(dir); dirent != NULL; dirent = readdir(dir)) {
+ struct hugepage_info *hpi;
+
+ if (strncmp(dirent->d_name, dirent_start_text,
+ dirent_start_len) != 0)
+ continue;
+
+ hpi = &internal_config.hugepage_info[num_sizes];
hpi->hugepage_sz = rte_str_to_size(&dirent->d_name[dirent_start_len]);
hpi->hugedir = get_hugepage_dir(hpi->hugepage_sz);
/* first, check if we have a mountpoint */
hpi->hugepage_sz = rte_str_to_size(&dirent->d_name[dirent_start_len]);
hpi->hugedir = get_hugepage_dir(hpi->hugepage_sz);
/* first, check if we have a mountpoint */
- if (hpi->hugedir == NULL){
- RTE_LOG(INFO, EAL, "%u hugepages of size %llu reserved, "\
+ if (hpi->hugedir == NULL) {
+ uint32_t num_pages;
+
+ num_pages = get_num_hugepages(dirent->d_name);
+ if (num_pages > 0)
+ RTE_LOG(INFO, EAL, "%" PRIu32 " hugepages of size %" PRIu64 " reserved, "
/* try to obtain a writelock */
hpi->lock_descriptor = open(hpi->hugedir, O_RDONLY);
/* if blocking lock failed */
if (flock(hpi->lock_descriptor, LOCK_EX) == -1) {
RTE_LOG(CRIT, EAL, "Failed to lock hugepage directory!\n");
/* try to obtain a writelock */
hpi->lock_descriptor = open(hpi->hugedir, O_RDONLY);
/* if blocking lock failed */
if (flock(hpi->lock_descriptor, LOCK_EX) == -1) {
RTE_LOG(CRIT, EAL, "Failed to lock hugepage directory!\n");
/* for now, put all pages into socket 0,
* later they will be sorted */
hpi->num_pages[0] = get_num_hugepages(dirent->d_name);
/* for now, put all pages into socket 0,
* later they will be sorted */
hpi->num_pages[0] = get_num_hugepages(dirent->d_name);
/* for 32-bit systems, limit number of hugepages to 1GB per page size */
hpi->num_pages[0] = RTE_MIN(hpi->num_pages[0],
RTE_PGSIZE_1G / hpi->hugepage_sz);
#endif
num_sizes++;
/* for 32-bit systems, limit number of hugepages to 1GB per page size */
hpi->num_pages[0] = RTE_MIN(hpi->num_pages[0],
RTE_PGSIZE_1G / hpi->hugepage_sz);
#endif
num_sizes++;
internal_config.num_hugepage_sizes = num_sizes;
/* sort the page directory entries by size, largest to smallest */
internal_config.num_hugepage_sizes = num_sizes;
/* sort the page directory entries by size, largest to smallest */
internal_config.hugepage_info[j].hugepage_sz)
swap_hpi(&internal_config.hugepage_info[j-1],
&internal_config.hugepage_info[j]);
internal_config.hugepage_info[j].hugepage_sz)
swap_hpi(&internal_config.hugepage_info[j-1],
&internal_config.hugepage_info[j]);
/* now we have all info, check we have at least one valid size */
for (i = 0; i < num_sizes; i++)
if (internal_config.hugepage_info[i].hugedir != NULL &&
/* now we have all info, check we have at least one valid size */
for (i = 0; i < num_sizes; i++)
if (internal_config.hugepage_info[i].hugedir != NULL &&