Linux kernel 2.6.8 on s390. CONFIG_NO_IDLE_HZ: Switches the regular HZ timer off when the system is going idle. This helps z/VM to detect that the Linux system is idle. VM can then "swap-out" this guest which reduces memory usage. It also reduces the overhead of idle systems. The HZ timer can be switched on/off via /proc/sys/kernel/hz_timer. hz_timer=0 means HZ timer is disabled. hz_timer=1 means HZ timer is active. See this item in context Full configuration for 2.6.8 on s390 Home   Search