Revert "set HZ=1000 (exp)"

This reverts commit 960405a8712016131866cf1fc4261e995b94cd61.
Revert "mm: swap: Rate limit swap write errors"

This reverts commit 20f5b509c0f03f0f6ff148fcce72538d6d8d1188.
Revert "CK3 tweaks (Credits to Con Kolivas)"

This reverts commit a616138f674ab9429601867932c1a658e175067b.