From: Jason Wang jasowang@redhat.com
commit 272f35cba53d088085e5952fd81d7a133ab90789 upstream.
Signed-off-by: Jason Wang jasowang@redhat.com Signed-off-by: David S. Miller davem@davemloft.net [bwh: Backported to 4.9: adjust context] Signed-off-by: Ben Hutchings ben.hutchings@codethink.co.uk --- drivers/vhost/net.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 4093b4eea8b9..0132cbd12706 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -357,6 +357,12 @@ static int vhost_net_tx_get_vq_desc(struct vhost_net *net, return r; }
+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) @@ -481,8 +487,7 @@ static void handle_tx(struct vhost_net *net) vhost_zerocopy_signal_used(net, vq); total_len += len; 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; } @@ -763,8 +768,7 @@ static void handle_rx(struct vhost_net *net) vhost_log_write(vq, vq_log, log, vhost_len, vq->iov, in); 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; }