Would there be any interest in having a sysctl to enable/disable meltdown and mds mitigations? I was poking around 'sys/arch/amd64/amd64/cpu.c' and it appears that these mitigations are currently hardcoded.
The benefit of having these sysctl's is that they would allow users to disable the mitigations for a tradeoff in performance. For example, I have an OpenBSD router only running dhcpd and pf which is struggling to keep up with a gigabit connection. Given that the system is only doing routing, I would assume it would be relatively low risk to disable the mitigations to get better performance. Thoughts? Elias
