• Linus Torvalds's avatar
    Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d652e1eb
    Linus Torvalds authored
    Pull scheduler changes from Ingo Molnar:
     "Main changes:
    
       - scheduler side full-dynticks (user-space execution is undisturbed
         and receives no timer IRQs) preparation changes that convert the
         cputime accounting code to be full-dynticks ready, from Frederic
         Weisbecker.
    
       - Initial sched.h split-up changes, by Clark Williams
    
       - select_idle_sibling() performance improvement by Mike Galbraith:
    
            " 1 tbench pair (worst case) in a 10 core + SMT package:
    
              pre   15.22 MB/sec 1 procs
              post 252.01 MB/sec 1 procs "
    
      - sched_rr_get_interval() ABI fix/change.  We think this detail is not
        used by apps (so it's not an ABI in practice), but lets keep it
        under observation.
    
      - misc RT scheduling cleanups, optimizations"
    
    * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
      sched/rt: Add <linux/sched/rt.h> header to <linux/init_task.h>
      cputime: Remove irqsave from seqlock readers
      sched, powerpc: Fix sched.h split-up build failure
      cputime: Restore CPU_ACCOUNTING config defaults for PPC64
      sched/rt: Move rt specific bits into new header file
      sched/rt: Add a tuning knob to allow changing SCHED_RR timeslice
      sched: Move sched.h sysctl bits into separate header
      sched: Fix signedness bug in yield_to()
      sched: Fix select_idle_sibling() bouncing cow syndrome
      sched/rt: Further simplify pick_rt_task()
      sched/rt: Do not account zero delta_exec in update_curr_rt()
      cputime: Safely read cputime of full dynticks CPUs
      kvm: Prepare to add generic guest entry/exit callbacks
      cputime: Use accessors to read task cputime stats
      cputime: Allow dynamic switch between tick/virtual based cputime accounting
      cputime: Generic on-demand virtual cputime accounting
      cputime: Move default nsecs_to_cputime() to jiffies based cputime file
      cputime: Librarize per nsecs resolution cputime definitions
      cputime: Avoid multiplication overflow on utime scaling
      context_tracking: Export context state for generic vtime
      ...
    
    Fix up conflict in kernel/context_tracking.c due to comment additions.
    d652e1eb