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Commit c92a8a8c authored by Jason Wang's avatar Jason Wang Committed by David S. Miller
Browse files

vhost_net: introduce tx_can_batch() 



Introduce tx_can_batch() to determine whether TX could be
batched. This will help to reduce the code duplication in the future.

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a2a91a13

drivers/vhost/net.c

+7 −2
Original line number Diff line number Diff line
@@ -514,6 +514,12 @@ static int get_tx_bufs(struct vhost_net *net, 
	return ret;

}



static bool tx_can_batch(struct vhost_virtqueue *vq, size_t total_len)

{

	return total_len < VHOST_NET_WEIGHT &&

	       !vhost_vq_avail_empty(vq->dev, vq);

}



/* 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)
@@ -598,8 +604,7 @@ static void handle_tx(struct vhost_net *net) 
			ubufs = NULL;

		}

		total_len += len;

		if (total_len < VHOST_NET_WEIGHT &&

		    !vhost_vq_avail_empty(&net->dev, vq) &&

		if (tx_can_batch(vq, total_len) &&

		    likely(!vhost_exceeds_maxpend(net))) {

			msg.msg_flags |= MSG_MORE;

		} else {