Add specific knob for controlling fallocate() usage

[fio.git] / filesetup.c

diff --git a/filesetup.c b/filesetup.c
index 70589aa513eaa95d6108664df88d43270d8ba475..cbef672e673e6d3c1d0d363466b677702e1953f1 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -64,6 +64,19 @@ static int extend_file(struct thread_data *td, struct fio_file *f)
                return 1;
        }
 
+#ifdef FIO_HAVE_FALLOCATE
+       if (td->o.fallocate && !td->o.fill_device) {
+               dprint(FD_FILE, "fallocate file %s size %llu\n", f->file_name,
+                                                       f->real_file_size);
+
+               r = posix_fallocate(f->fd, 0, f->real_file_size);
+               if (r < 0) {
+                       log_err("fio: posix_fallocate fails: %s\n",
+                                       strerror(-r));
+               }
+       }
+#endif
+       
        if (!new_layout)
                goto done;
 
@@ -78,16 +91,6 @@ static int extend_file(struct thread_data *td, struct fio_file *f)
                        td_verror(td, errno, "ftruncate");
                        goto err;
                }
-
-#ifdef FIO_HAVE_FALLOCATE
-               dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
-                                                       f->real_file_size);
-               r = posix_fallocate(f->fd, 0, f->real_file_size);
-               if (r < 0) {
-                       log_err("fio: posix_fallocate fails: %s\n",
-                                       strerror(-r));
-               }
-#endif
        }
 
        b = malloc(td->o.max_bs[DDIR_WRITE]);