This is already enabled in the rockchip family on edge and per the discussion
here: https://forum.armbian.com/topic/20018-mglru-patches-to-bring-down-kswapd-cpu-usage
I would like to enable it on meson64-edge. And if that goes smoothly,
I will followup with a PR to enable it on meson64-current also since that is
now on 6.1.
Changes to be committed:
modified: config/kernel/linux-meson64-edge.config