Comment 6 for bug 1763323

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Po-Hsu Lin (cypressyew) wrote : Re: ubuntu_fan_smoke_test failed on 4.4/4.15 kvm kernel

Discussed with smb and jvosburgh, this issue is similar to bug 1570565, some configs are missing for the KVM kernel.

$ grep -e VXLAN -e IPIP ubuntu-*-kvm/debian.kvm/config/config.common.ubuntu
ubuntu-bionic-kvm/debian.kvm/config/config.common.ubuntu:# CONFIG_NET_IPIP is not set
ubuntu-bionic-kvm/debian.kvm/config/config.common.ubuntu:# CONFIG_VXLAN is not set

ubuntu-xenial-kvm/debian.kvm/config/config.common.ubuntu:CONFIG_NET_IPIP=y
ubuntu-xenial-kvm/debian.kvm/config/config.common.ubuntu:# CONFIG_VXLAN is not set

The fan tunneling uses IPIP or VXLAN, if both of these config were disabled, then this fan stuff is not expected to work and the test should be disabled on the KVM kernel.

But the IPIP was enabled on Xenial KVM kernel, we will need to discuss this.