Re: [PATCH V3 2/2 net-next] hyperv: Support batched notification

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On Wed, Mar 18, 2015 at 12:02 AM, K. Y. Srinivasan <kys@xxxxxxxxxxxxx> 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 <kys@xxxxxxxxxxxxx>
---
 drivers/net/hyperv/hyperv_net.h   |    2 +-
 drivers/net/hyperv/netvsc.c       |   14 +++++++++-----
 drivers/net/hyperv/netvsc_drv.c   |    2 +-
 drivers/net/hyperv/rndis_filter.c |    2 +-
 4 files changed, 12 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..eae58db 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -556,7 +556,7 @@ 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, !skb->xmit_more);

Looks like the issue of V2 still there (E.g we need to kick when hv_ringbuffer_write() returns -EAGAIN?

 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@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel




[Index of Archives]     [Linux Driver Backports]     [DMA Engine]     [Linux GPIO]     [Linux SPI]     [Video for Linux]     [Linux USB Devel]     [Linux Coverity]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux