Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a7056c5b authored by David Howells's avatar David Howells
Browse files

rxrpc: Send an immediate ACK if we fill in a hole 



Send an immediate ACK if we fill in a hole in the buffer left by an
out-of-sequence packet.  This may allow the congestion management in the peer
to avoid a retransmission if packets got reordered on the wire.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent 805b21b9

net/rxrpc/input.c

+9 −1
Original line number Diff line number Diff line
@@ -331,8 +331,16 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb, 
	call->rxtx_annotations[ix] = annotation;

	smp_wmb();

	call->rxtx_buffer[ix] = skb;

	if (after(seq, call->rx_top))

	if (after(seq, call->rx_top)) {

		smp_store_release(&call->rx_top, seq);

	} else if (before(seq, call->rx_top)) {

		/* Send an immediate ACK if we fill in a hole */

		if (!ack) {

			ack = RXRPC_ACK_DELAY;

			ack_serial = serial;

		}

		immediate_ack = true;

	}

	if (flags & RXRPC_LAST_PACKET) {

		set_bit(RXRPC_CALL_RX_LAST, &call->flags);

		trace_rxrpc_receive(call, rxrpc_receive_queue_last, serial, seq);