Вместо неё теперь
Periodic timer ticks
Idle dynticks system
This option enables a tickless idle system: timer interrupts
will only trigger on an as-needed basis when the system is idle.
This is usually interesting for energy saving.
Full dynticks system
Adaptively try to shutdown the tick whenever possible, even when
the CPU is running tasks. Typically this requires running a single
task on the CPU. Chances for running tickless are maximized when
the task mostly runs in userspace and has few kernel activity.

тут я со своим инглишем запутался. какая вместо неё теперь? вторая или третья?