1. 06 4月, 2018 1 次提交
    • R
      time: tick-sched: Reorganize idle tick management code · 0e776768
      Rafael J. Wysocki 提交于
      Prepare the scheduler tick code for reworking the idle loop to
      avoid stopping the tick in some cases.
      
      The idea is to split the nohz idle entry call to decouple the idle
      time stats accounting and preparatory work from the actual tick stop
      code, in order to later be able to delay the tick stop once we reach
      more power-knowledgeable callers.
      
      Move away the tick_nohz_start_idle() invocation from
      __tick_nohz_idle_enter(), rename the latter to
      __tick_nohz_idle_stop_tick() and define tick_nohz_idle_stop_tick()
      as a wrapper around it for calling it from the outside.
      
      Make tick_nohz_idle_enter() only call tick_nohz_start_idle() instead
      of calling the entire __tick_nohz_idle_enter(), add another wrapper
      disabling and enabling interrupts around tick_nohz_idle_stop_tick()
      and make the current callers of tick_nohz_idle_enter() call it too
      to retain their current functionality.
      Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
      Reviewed-by: NFrederic Weisbecker <frederic@kernel.org>
      Acked-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
      0e776768
  2. 03 4月, 2018 39 次提交