This would be the best long-term solution.
It’s good to allow the system to swap for those extreme situations where memory demands are too high, and it needs a safety cushion to prevent a system crash or OOM.
Even though I’m on Core (FreeBSD), I don’t disable swap. Even if it never (or rarely) is needed. The cost is inconsequential, yet it could save my system from those rare (but possible) situations.
Best of both worlds for SCALE: ARC behaves as it was meant to, without restriction and without causing system instability, yet there is a swap available if it’s ever needed.
@mav: To complement this fix (disabling lru_gen), wouldn’t it also make sense to set swappiness=1 as the default for SCALE?