[RFC PATCH net-next 03/12] vhost_net: introduce vhost_has_more_pkts()
From: Jason Wang <jasowang@redhat.com>
Date: 2018-05-21 09:08:51
Also in:
kvm, lkml, netdev
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
Signed-off-by: Jason Wang <jasowang@redhat.com> --- drivers/vhost/net.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index de544ee..4ebac76 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c@@ -485,6 +485,13 @@ static bool vhost_exceeds_weight(int pkts, int total_len) unlikely(pkts >= VHOST_NET_PKT_WEIGHT); } +static bool vhost_has_more_pkts(struct vhost_net *net, + struct vhost_virtqueue *vq) +{ + return !vhost_vq_avail_empty(&net->dev, vq) && + likely(!vhost_exceeds_maxpend(net)); +} + /* 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)
@@ -578,8 +585,7 @@ static void handle_tx(struct vhost_net *net) } total_len += len; if (total_len < VHOST_NET_WEIGHT && - !vhost_vq_avail_empty(&net->dev, vq) && - likely(!vhost_exceeds_maxpend(net))) { + vhost_has_more_pkts(net, vq)) { msg.msg_flags |= MSG_MORE; } else { msg.msg_flags &= ~MSG_MORE;
@@ -605,7 +611,7 @@ static void handle_tx(struct vhost_net *net) else vhost_zerocopy_signal_used(net, vq); vhost_net_tx_packet(net); - if (unlikely(vhost_exceeds_weight(++sent_pkts, total_len))) { + if (vhost_exceeds_weight(++sent_pkts, total_len)) { vhost_poll_queue(&vq->poll); break; }
--
2.7.4