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Commit 272f35cb authored by Jason Wang's avatar Jason Wang Committed by David S. Miller
Browse files

vhost_net: introduce vhost_exceeds_weight() 



Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b0d0ea50

drivers/vhost/net.c

+8 −5
Original line number Diff line number Diff line
@@ -478,6 +478,12 @@ static size_t init_iov_iter(struct vhost_virtqueue *vq, struct iov_iter *iter, 
	return iov_iter_count(iter);

}



static bool vhost_exceeds_weight(int pkts, int total_len)

{

	return total_len >= VHOST_NET_WEIGHT ||

	       pkts >= VHOST_NET_PKT_WEIGHT;

}



/* Expects to be always run from workqueue - which acts as

 * read-size critical section for our kind of RCU. */

static void handle_tx(struct vhost_net *net)
@@ -576,7 +582,6 @@ static void handle_tx(struct vhost_net *net) 
			msg.msg_control = NULL;

			ubufs = NULL;

		}



		total_len += len;

		if (total_len < VHOST_NET_WEIGHT &&

		    !vhost_vq_avail_empty(&net->dev, vq) &&
@@ -606,8 +611,7 @@ static void handle_tx(struct vhost_net *net) 
		else

			vhost_zerocopy_signal_used(net, vq);

		vhost_net_tx_packet(net);

		if (unlikely(total_len >= VHOST_NET_WEIGHT) ||

		    unlikely(++sent_pkts >= VHOST_NET_PKT_WEIGHT)) {

		if (unlikely(vhost_exceeds_weight(++sent_pkts, total_len))) {

			vhost_poll_queue(&vq->poll);

			break;

		}
@@ -918,8 +922,7 @@ static void handle_rx(struct vhost_net *net) 
		if (unlikely(vq_log))

			vhost_log_write(vq, vq_log, log, vhost_len);

		total_len += vhost_len;

		if (unlikely(total_len >= VHOST_NET_WEIGHT) ||

		    unlikely(++recv_pkts >= VHOST_NET_PKT_WEIGHT)) {

		if (unlikely(vhost_exceeds_weight(++recv_pkts, total_len))) {

			vhost_poll_queue(&vq->poll);

			goto out;

		}