From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752267AbbCLDJO (ORCPT ); Wed, 11 Mar 2015 23:09:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56250 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751730AbbCLDJM (ORCPT ); Wed, 11 Mar 2015 23:09:12 -0400 Date: Thu, 12 Mar 2015 11:08:32 +0800 From: Jason Wang Subject: Re: [PATCH V2 3/3 net-next] hyperv: Support batched notification To: "K. Y. Srinivasan" Cc: davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, gregkh@linuxfoundation.org, "K. Y. Srinivasan" Message-Id: <1426129712.12154.3@smtp.corp.redhat.com> In-Reply-To: <1426100660-9547-3-git-send-email-kys@microsoft.com> References: <1426100635-9508-1-git-send-email-kys@microsoft.com> <1426100660-9547-1-git-send-email-kys@microsoft.com> <1426100660-9547-3-git-send-email-kys@microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 12, 2015 at 3:04 AM, K. Y. Srinivasan wrote: > Optimize notifying the host by deferring notification until there > are no more packets to be sent. This will help in batching the > requests > on the host. > > Signed-off-by: K. Y. Srinivasan > --- > drivers/net/hyperv/hyperv_net.h | 2 +- > drivers/net/hyperv/netvsc.c | 14 +++++++++----- > drivers/net/hyperv/netvsc_drv.c | 3 ++- > drivers/net/hyperv/rndis_filter.c | 2 +- > 4 files changed, 13 insertions(+), 8 deletions(-) > > diff --git a/drivers/net/hyperv/hyperv_net.h > b/drivers/net/hyperv/hyperv_net.h > index 4815843..3fd9896 100644 > --- a/drivers/net/hyperv/hyperv_net.h > +++ b/drivers/net/hyperv/hyperv_net.h > @@ -184,7 +184,7 @@ struct rndis_device { > int netvsc_device_add(struct hv_device *device, void > *additional_info); > int netvsc_device_remove(struct hv_device *device); > int netvsc_send(struct hv_device *device, > - struct hv_netvsc_packet *packet); > + struct hv_netvsc_packet *packet, bool kick_q); > void netvsc_linkstatus_callback(struct hv_device *device_obj, > struct rndis_message *resp); > int netvsc_recv_callback(struct hv_device *device_obj, > diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c > index 208eb05..9003b94 100644 > --- a/drivers/net/hyperv/netvsc.c > +++ b/drivers/net/hyperv/netvsc.c > @@ -707,7 +707,7 @@ static u32 netvsc_copy_to_send_buf(struct > netvsc_device *net_device, > } > > int netvsc_send(struct hv_device *device, > - struct hv_netvsc_packet *packet) > + struct hv_netvsc_packet *packet, bool kick_q) > { > struct netvsc_device *net_device; > int ret = 0; > @@ -719,6 +719,7 @@ int netvsc_send(struct hv_device *device, > u32 msg_size = 0; > struct sk_buff *skb = NULL; > u16 q_idx = packet->q_idx; > + u32 vmbus_flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; > > > net_device = get_outbound_net_device(device); > @@ -768,18 +769,21 @@ int netvsc_send(struct hv_device *device, > return -ENODEV; > > if (packet->page_buf_cnt) { > - ret = vmbus_sendpacket_pagebuffer(out_channel, > + ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, > packet->page_buf, > packet->page_buf_cnt, > &sendMessage, > sizeof(struct nvsp_message), > - req_id); > + req_id, > + vmbus_flags, > + kick_q); > } else { > - ret = vmbus_sendpacket(out_channel, &sendMessage, > + ret = vmbus_sendpacket_ctl(out_channel, &sendMessage, > sizeof(struct nvsp_message), > req_id, > VM_PKT_DATA_INBAND, > - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); > + vmbus_flags, > + kick_q); > } > > if (ret == 0) { > diff --git a/drivers/net/hyperv/netvsc_drv.c > b/drivers/net/hyperv/netvsc_drv.c > index a06bd66..80b4b29 100644 > --- a/drivers/net/hyperv/netvsc_drv.c > +++ b/drivers/net/hyperv/netvsc_drv.c > @@ -384,6 +384,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, > struct net_device *net) > u32 net_trans_info; > u32 hash; > u32 skb_length = skb->len; > + bool kick_q = !skb->xmit_more; > > > /* We will atmost need two pages to describe the rndis > @@ -556,7 +557,7 @@ do_send: > packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, > skb, &packet->page_buf[0]); > > - ret = netvsc_send(net_device_ctx->device_ctx, packet); > + ret = netvsc_send(net_device_ctx->device_ctx, packet, kick_q); Maybe just a !skb->xmit_more here to save a local variable. > > > drop: > if (ret == 0) { > diff --git a/drivers/net/hyperv/rndis_filter.c > b/drivers/net/hyperv/rndis_filter.c > index ca81de0..05f3792 100644 > --- a/drivers/net/hyperv/rndis_filter.c > +++ b/drivers/net/hyperv/rndis_filter.c > @@ -238,7 +238,7 @@ static int rndis_filter_send_request(struct > rndis_device *dev, > > packet->send_completion = NULL; > > - ret = netvsc_send(dev->net_dev->dev, packet); > + ret = netvsc_send(dev->net_dev->dev, packet, true); > return ret; > } > > -- > 1.7.4.1 > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html