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vhost_net: introduce tx_can_batch()

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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: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Wang 2018-07-20 08:15:17 +08:00 committed by David S. Miller
parent a2a91a137a
commit c92a8a8cb7
1 changed files with 7 additions and 2 deletions
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9
drivers/vhost/net.c
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@ -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 {