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/
