From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 11 Jun 2012 06:53:53 +0000 (+0200)
Subject: Add a more verbose/immediate warning if we fail open with O_DIRECT
X-Git-Tag: fio-2.0.9~18
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=a93c5f049da63a60f9962177d8ada50094d234de;hp=d39879467ccb7f136815be0ba7fd283524c2dafb

Add a more verbose/immediate warning if we fail open with O_DIRECT

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>
---

diff --git a/filesetup.c b/filesetup.c
index a1ad0263..b1f73f71 100644
--- a/filesetup.c
+++ b/filesetup.c
@@ -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);
 	}