- if (td->mem_type == MEM_MALLOC)
- td->orig_buffer = malloc(td->orig_buffer_size);
- else if (td->mem_type == MEM_SHM) {
- td->shm_id = shmget(IPC_PRIVATE, td->orig_buffer_size, IPC_CREAT | 0600);
- if (td->shm_id < 0) {
- td_verror(td, errno);
- perror("shmget");
- return 1;
+ int flags = IPC_CREAT | SHM_R | SHM_W;
+
+ if (td->o.mem_type == MEM_SHMHUGE)
+ flags |= SHM_HUGETLB;
+
+ td->shm_id = shmget(IPC_PRIVATE, td->orig_buffer_size, flags);
+ if (td->shm_id < 0) {
+ td_verror(td, errno, "shmget");
+ if (geteuid() != 0 && errno == ENOMEM)
+ log_err("fio: you may need to run this job as root\n");
+ if (td->o.mem_type == MEM_SHMHUGE) {
+ if (errno == EINVAL)
+ log_err("fio: check that you have free huge pages and that hugepage-size is correct.\n");
+ else if (errno == ENOSYS)
+ log_err("fio: your system does not appear to support huge pages.\n");
+ else if (errno == ENOMEM)
+ log_err("fio: no huge pages available, do you need to alocate some? See HOWTO.\n");