In commit fab0de02fb0da83b90cec7fce4294747d86d5c6f CONFIG_IP_VS_IPV6 is
Add IPv6 support to IPVS. This is incomplete and might be dangerous.
I agree its implementation is incomplete. But I wonder if it's really
dangerous in the sense that generic distribution kernels shouldn't
enable it, because it can break unrelated (eg. IPv4 IPVS) functionality.
What does that warning mean today? Isn't it out of date?