Add a more verbose/immediate warning if we fail open with O_DIRECT
authorJens Axboe <axboe@kernel.dk>
Mon, 11 Jun 2012 06:53:53 +0000 (08:53 +0200)
committerJens Axboe <axboe@kernel.dk>
Mon, 11 Jun 2012 06:53:53 +0000 (08:53 +0200)
If we get EINVAL with O_DIRECT open of the file, then that means
that the file system does not support direct IO. Warn as such
from fio.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
filesetup.c

index a1ad026..b1f73f7 100644 (file)
@@ -526,6 +526,11 @@ open_again:
 
                snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 
+               if (__e == EINVAL && (flags & OS_O_DIRECT)) {
+                       log_err("fio: looks like your file system does not " \
+                               "support direct=1/buffered=0\n");
+               }
+
                td_verror(td, __e, buf);
        }