- /* set shared flock on the file. */
- if (flock(fd, LOCK_SH | LOCK_NB) == -1) {
- RTE_LOG(ERR, EAL, "%s(): Locking file failed:%s \n",
- __func__, strerror(errno));
- close(fd);
- return -1;
- }
-
- close(fd);
-
- vma_addr = (char *)vma_addr + hugepage_sz;
- vma_len -= hugepage_sz;
- }
- return 0;
-}
-
-#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS
-
-/*
- * Remaps all hugepages into single file segments
- */
-static int
-remap_all_hugepages(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
-{
- int fd;
- unsigned i = 0, j, num_pages, page_idx = 0;
- void *vma_addr = NULL, *old_addr = NULL, *page_addr = NULL;
- size_t vma_len = 0;
- size_t hugepage_sz = hpi->hugepage_sz;
- size_t total_size, offset;
- char filepath[MAX_HUGEPAGE_PATH];
- phys_addr_t physaddr;
- int socket;
-
- while (i < hpi->num_pages[0]) {
-
-#ifndef RTE_ARCH_64
- /* for 32-bit systems, don't remap 1G pages and 16G pages,
- * just reuse original map address as final map address.
- */
- if ((hugepage_sz == RTE_PGSIZE_1G)
- || (hugepage_sz == RTE_PGSIZE_16G)) {
- hugepg_tbl[i].final_va = hugepg_tbl[i].orig_va;
- hugepg_tbl[i].orig_va = NULL;
- i++;
- continue;
- }
-#endif
-
- /* reserve a virtual area for next contiguous
- * physical block: count the number of
- * contiguous physical pages. */
- for (j = i+1; j < hpi->num_pages[0] ; j++) {
-#ifdef RTE_ARCH_PPC_64
- /* The physical addresses are sorted in descending
- * order on PPC64 */
- if (hugepg_tbl[j].physaddr !=
- hugepg_tbl[j-1].physaddr - hugepage_sz)
- break;
-#else
- if (hugepg_tbl[j].physaddr !=
- hugepg_tbl[j-1].physaddr + hugepage_sz)
- break;
-#endif
- }
- num_pages = j - i;
- vma_len = num_pages * hugepage_sz;
-
- socket = hugepg_tbl[i].socket_id;
-
- /* get the biggest virtual memory area up to
- * vma_len. If it fails, vma_addr is NULL, so
- * let the kernel provide the address. */
- vma_addr = get_virtual_area(&vma_len, hpi->hugepage_sz);
-
- /* If we can't find a big enough virtual area, work out how many pages
- * we are going to get */
- if (vma_addr == NULL)
- j = i + 1;
- else if (vma_len != num_pages * hugepage_sz) {
- num_pages = vma_len / hugepage_sz;
- j = i + num_pages;
-
- }
-
- hugepg_tbl[page_idx].file_id = page_idx;
- eal_get_hugefile_path(filepath,
- sizeof(filepath),
- hpi->hugedir,
- hugepg_tbl[page_idx].file_id);
-
- /* try to create hugepage file */
- fd = open(filepath, O_CREAT | O_RDWR, 0755);
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "%s(): open failed: %s\n", __func__, strerror(errno));
- return -1;
- }
-
- total_size = 0;
- for (;i < j; i++) {
-
- /* unmap current segment */
- if (total_size > 0)
- munmap(vma_addr, total_size);
-
- /* unmap original page */
- munmap(hugepg_tbl[i].orig_va, hugepage_sz);
- unlink(hugepg_tbl[i].filepath);
-
- total_size += hugepage_sz;
-
- old_addr = vma_addr;
-
- /* map new, bigger segment */
- vma_addr = mmap(vma_addr, total_size,
- PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-
- if (vma_addr == MAP_FAILED || vma_addr != old_addr) {
- RTE_LOG(ERR, EAL, "%s(): mmap failed: %s\n", __func__, strerror(errno));
+ if (orig) {
+ /* In linux, hugetlb limitations, like cgroup, are
+ * enforced at fault time instead of mmap(), even
+ * with the option of MAP_POPULATE. Kernel will send
+ * a SIGBUS signal. To avoid to be killed, save stack
+ * environment here, if SIGBUS happens, we can jump
+ * back here.
+ */
+ if (huge_wrap_sigsetjmp()) {
+ RTE_LOG(DEBUG, EAL, "SIGBUS: Cannot mmap more "
+ "hugepages of size %u MB\n",
+ (unsigned)(hugepage_sz / 0x100000));
+ munmap(virtaddr, hugepage_sz);