add fio_set_directio() error message for platforms without direct I/O

This lets platforms without dio (e.g. OpenBSD) fail with an explicit
message, otherwise they fail without a clue about dio even with
--debug=all enabled.

The message modified based on comments from Jens.

Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/filesetup.c b/filesetup.c
index b51ab35ce08b59ccbff3d2d7f2da2692c69a85aa..891a55a1ddb97ab30c7cc375cd9246fed21addd8 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -1868,6 +1868,7 @@ int fio_set_directio(struct thread_data *td, struct fio_file *f)
 
        return 0;
 #else
+       log_err("fio: direct IO is not supported on this host operating system\n");
        return -1;
 #endif
 }