On 2018年05月22日 00:29, Jesse Brandeburg wrote:
On Mon, 21 May 2018 17:04:23 +0800 Jason wrote:
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/vhost/net.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 15d191a..de544ee 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -479,6 +479,12 @@ static size_t init_iov_iter(struct vhost_virtqueue *vq, struct iov_iter *iter,
return len;
}
+static bool vhost_exceeds_weight(int pkts, int total_len)
+{
+ return unlikely(total_len >= VHOST_NET_WEIGHT) ||
+ unlikely(pkts >= VHOST_NET_PKT_WEIGHT);
I was going to say just one unlikely, but then the caller of this
function also says unlikely(vhost_exceeds...), so I think you should
just drop the unlikely statements here (both of them)
Ok.
+}
+
/* 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)
@@ -570,7 +576,6 @@ static void handle_tx(struct vhost_net *net)
msg.msg_control = NULL;
ubufs = NULL;
}
-
unrelated whitespace changes?
Yes.
Thanks
total_len += len;
if (total_len < VHOST_NET_WEIGHT &&
!vhost_vq_avail_empty(&net->dev, vq) &&
@@ -600,8 +605,7 @@ 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;
}
@@ -887,8 +891,7 @@ 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;
}
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