Downgrade kernel version on all machines
Currently all machines are running Linux kernel 4.13. In gitlab-com/infrastructure#3967 (I think) this kernel release is troublesome, so we need to downgrade the kernel version to a "more stable" version.
Currently all machines are running Linux kernel 4.13. In gitlab-com/infrastructure#3967 (I think) this kernel release is troublesome, so we need to downgrade the kernel version to a "more stable" version.