• Linus Torvalds's avatar
    Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a1d85611
    Linus Torvalds authored
    Pull scheduler updates from Ingo Molnar:
     "The biggest change in this cycle is the rewrite of the main SMP load
      balancing metric: the CPU load/utilization.  The main goal was to make
      the metric more precise and more representative - see the changelog of
      this commit for the gory details:
    
        9d89c257 ("sched/fair: Rewrite runnable load and utilization average tracking")
    
      It is done in a way that significantly reduces complexity of the code:
    
        5 files changed, 249 insertions(+), 494 deletions(-)
    
      and the performance testing results are encouraging.  Nevertheless we
      need to keep an eye on potential regressions, since this potentially
      affects every SMP workload in existence.
    
      This work comes from Yuyang Du.
    
      Other changes:
    
       - SCHED_DL updates.  (Andrea Parri)
    
       - Simplify architecture callbacks by removing finish_arch_switch().
         (Peter Zijlstra et al)
    
       - cputime accounting: guarantee stime + utime == rtime.  (Peter
         Zijlstra)
    
       - optimize idle CPU wakeups some more - inspired by Facebook server
         loads.  (Mike Galbraith)
    
       - stop_machine fixes and updates.  (Oleg Nesterov)
    
       - Introduce the 'trace_sched_waking' tracepoint.  (Peter Zijlstra)
    
       - sched/numa tweaks.  (Srikar Dronamraju)
    
       - misc fixes and small cleanups"
    
    * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
      sched/deadline: Fix comment in enqueue_task_dl()
      sched/deadline: Fix comment in push_dl_tasks()
      sched: Change the sched_class::set_cpus_allowed() calling context
      sched: Make sched_class::set_cpus_allowed() unconditional
      sched: Fix a race between __kthread_bind() and sched_setaffinity()
      sched: Ensure a task has a non-normalized vruntime when returning back to CFS
      sched/numa: Fix NUMA_DIRECT topology identification
      tile: Reorganize _switch_to()
      sched, sparc32: Update scheduler comments in copy_thread()
      sched: Remove finish_arch_switch()
      sched, tile: Remove finish_arch_switch
      sched, sh: Fold finish_arch_switch() into switch_to()
      sched, score: Remove finish_arch_switch()
      sched, avr32: Remove finish_arch_switch()
      sched, MIPS: Get rid of finish_arch_switch()
      sched, arm: Remove finish_arch_switch()
      sched/fair: Clean up load average references
      sched/fair: Provide runnable_load_avg back to cfs_rq
      sched/fair: Remove task and group entity load when they are dead
      sched/fair: Init cfs_rq's sched_entity load average
      ...
    a1d85611
core.c 204 KB