--- mysql-5.1.15-beta-20070124/storage/innobase/os/os0file.c	Wed Jan 24 14:16:56 2007
+++ mysql-5.1.15-beta-20070124-directio/storage/innobase/os/os0file.c	Sun Mar  4 13:27:19 2007
@@ -1356,6 +1356,14 @@
 		file = -1;
 #endif
 	} else {
+#ifdef DIRECTIO_ON
+		if (type != OS_LOG_FILE) {
+			if (directio(file, DIRECTIO_ON) == -1) {
+				fprintf(stderr, "  InnoDB: Cannot enable direct I/O "
+					"for %s: %s\n", name, strerror(errno));
+			}
+		}
+#endif
 		*success = TRUE;
 	}