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Thanks to Martin via DK for suggestion.

diff --git a/lib/rconn.c b/lib/rconn.c
index 96e413466d4d4bc8690973f58537b1cbbd0c5303..0ec847470b11de5fffe1bd0d5a21757a0efd1fe4 100644 (file)
--- a/lib/rconn.c
+++ b/lib/rconn.c
@@ -517,6 +517,11 @@ rconn_send(struct rconn *rc, struct ofpbuf *b, int *n_queued)
             ++*n_queued;
         }
         queue_push_tail(&rc->txq, b);
+
+        /* If the queue was empty before we added 'b', try to send some
+         * packets.  (But if the queue had packets in it, it's because the
+         * vconn is backlogged and there's no point in stuffing more into it
+         * now.  We'll get back to that in rconn_run().) */
         if (rc->txq.n == 1) {
             try_send(rc);
         }