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Date:   Wed, 10 Jan 2018 16:19:05 -0500
From:   Eric Whitney <>
Subject: [PATCH] common/rc: ext4 doesn't support O_DIRECT with data journaling

Modify _require_odirect() to skip O_DIRECT tests if the ext4 mount
option data=journal has been applied.  Because ext4 disables its
O_DIRECT support when in data journaling mode, no significant value is
obtained by running these tests and they consume a significant amount
of run time.  Additionally, this change eliminates the need to triage
false negative O_DIRECT test results caused by test problems, as has
occurred from time to time.

Signed-off-by: Eric Whitney <>
 common/rc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/common/rc b/common/rc
index 9216efdb..86cc9665 100644
--- a/common/rc
+++ b/common/rc
@@ -2150,6 +2150,8 @@ _require_odirect()
 	if [ $FSTYP = "ext4" ] ; then
 		if echo "$MOUNT_OPTIONS" | grep -q "test_dummy_encryption"; then
 			_notrun "ext4 encryption doesn't support O_DIRECT"
+		elif echo "$MOUNT_OPTIONS" | grep -q "data=journal"; then
+			_notrun "ext4 data journaling doesn't support O_DIRECT"

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