[ovs-dev] [PATCH RFC] - vxlan udp csum and openstack ovs performance

Jesse Gross jesse at nicira.com
Fri Aug 28 01:26:02 UTC 2015

On Thu, Aug 27, 2015 at 5:46 PM, Ramu Ramamurthy
<sramamur at linux.vnet.ibm.com> wrote:
> We found that enabling UDP checksums for vxlan triggers GRO on the receiver,
> and boosts the vxlan performance to 8+ Gbps.
> Hence, we want to enable vxlan csum for OVS vxlan tunnels. This is already
> supported in OVS 2.4, and kernel versions 4+ - But we
> want this fix to appear in 3.x upstream kernels, and the corresponding
> userspace change in OVS 2.3.

Sorry, this isn't going to happen. Neither the upstream kernel nor OVS
backport features to already released versions.

OVS 2.4 has been released with this feature and is packaged with a
kernel module of backports. Please just use that - considering that
you'd have to make changes all the way up the stack, I don't think
it's any more disruptive.

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