diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -4010,8 +4010,11 @@
 
 	error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL, "getblku", 0,
 	    0);
-	if (error != 0)
+	if (error != 0) {
+		if ((flags & GB_LOCK_NOWAIT) != 0)
+			return (error);
 		goto loop;
+	}
 
 	/* Verify buf identify has not changed since lookup. */
 	if (bp->b_bufobj == bo && bp->b_lblkno == blkno)