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");
+
return 1;
}
td->orig_buffer = NULL;
return 1;
}
+ if (ftruncate(td->mmapfd, td->orig_buffer_size) < 0) {
+ td_verror(td, errno, "truncate mmap file");
+ td->orig_buffer = NULL;
+ return 1;
+ }
} else
flags |= OS_MAP_ANON;