From: Jan Kara <jack@suse.cz>
Subject: Warn if XFS realtime volumes are used
References: fate#314871
Patch-mainline: Never, not enabled in SLE15

Since XFS realtime volumes are not really first class feature, warn user if
they are used.

Signed-off-by: Jan Kara <jack@suse.cz>

---
 fs/xfs/xfs_rtalloc.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -1210,6 +1210,9 @@ xfs_rtmount_init(
 		return error;
 	}
 	xfs_buf_relse(bp);
+	xfs_warn(mp, "Realtime volumes are an experimental feature. Please "
+		"contact SUSE Technical Services in case you encounter any "
+		"issues.");
 	return 0;
 }