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authorKY Srinivasan <kys@microsoft.com>2014-04-30 10:14:31 -0700
committerDavid S. Miller <davem@davemloft.net>2014-04-30 13:48:46 -0400
commitc25aaf814a63f9d9c4e45416f13d70ef0aa0be2e (patch)
treebe6bb2c8784382684365e47b202f02bd5a95babe /drivers/staging
parentcc80ee13609dc5926ad563d1a793991c80675e65 (diff)
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>
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