diff options
| author | KY Srinivasan <kys@microsoft.com> | 2014-04-30 21:14:31 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-04-30 21:48:46 +0400 |
| commit | c25aaf814a63f9d9c4e45416f13d70ef0aa0be2e (patch) | |
| tree | be6bb2c8784382684365e47b202f02bd5a95babe /drivers/net/hyperv/netvsc_drv.c | |
| parent | cc80ee13609dc5926ad563d1a793991c80675e65 (diff) | |
| download | linux-c25aaf814a63f9d9c4e45416f13d70ef0aa0be2e.tar.xz | |
hyperv: Enable sendbuf mechanism on the send path
We send packets using a copy-free mechanism (this is the Guest to Host transport
via VMBUS). While this is obviously optimal for large packets,
it may not be optimal for small packets. Hyper-V host supports
a second mechanism for sending packets that is "copy based". We implement that
mechanism in this patch.
In this version of the patch I have addressed a comment from David Miller.
With this patch (and all of the other offload and VRSS patches), we are now able
to almost saturate a 10G interface between Linux VMs on Hyper-V
on different hosts - close to 9 Gbps as measured via iperf.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv/netvsc_drv.c')
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index c76b66515e92..939e3af60ec4 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -236,10 +236,11 @@ static void netvsc_xmit_completion(void *context) struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; struct sk_buff *skb = (struct sk_buff *) (unsigned long)packet->send_completion_tid; + u32 index = packet->send_buf_index; kfree(packet); - if (skb) + if (skb && (index == NETVSC_INVALID_INDEX)) dev_kfree_skb_any(skb); } |