Messages in this thread | | | Subject | Re: [RFC PATCH net-next 02/12] vhost_net: introduce vhost_exceeds_weight() | From | Jason Wang <> | Date | Tue, 22 May 2018 20:27:51 +0800 |
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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@redhat.com> >> --- >> 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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