Index: sys/vm/vm_pager.c
===================================================================
--- sys/vm/vm_pager.c
+++ sys/vm/vm_pager.c
@@ -467,7 +467,7 @@
 	bp->b_ioflags = 0;
 	bp->b_iodone = NULL;
 	bp->b_error = 0;
-	BUF_LOCK(bp, LK_EXCLUSIVE, NULL);
+	BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL);
 
 	return (0);
 }