On 03/17/2016 03:27 PM, Jesse Gross wrote:
On Thu, Mar 17, 2016 at 7:02 AM, Patrick Boutilier <bouti...@ednet.ns.ca> wrote:
I have an IPIP tunnel setup between two hosts in different buildings. The
Linux router they route through causes extreme slowness in the tunnel when
running kernels from 3.18 on . tcpdump shows many cksum errors which don't
show up in the 3.17 and earlier kernels. Speed goes back to normal when
rx-checksumming and tx-checksumming are turned off using ethtool on the
Linux router . Would this be an effect of bulk network packet transmission
that was introduced in 3.18 or some other issue?

I just sent out a likely fix, would you mind testing it?
https://patchwork.ozlabs.org/patch/599213/


Yes, that patch fixes the problem.

Thanks.

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