LinuC Level 3 Platform Specialist 3PS-100 — PracticeTrial (no sign-up)

A Linux host uses ratio-based dirty-page controls; both vm.dirty_background_bytes and vm.dirty_bytes are 0. Its current settings are: vm.dirty_background_ratio = 20 vm.dirty_ratio = 30 Which change starts background writeback at 5% while retaining the writer-side limit at 30%?