[GIT PULL] Scheduler changes for v6.8

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest sched/core git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-core-2024-01-08

   # HEAD: cdb3033e191fd03da2d7da23b9cd448dfa180a8e Merge branch 'sched/urgent' into sched/core, to pick up pending v6.7 fixes for the v6.8 merge window

Scheduler changes for v6.8:

 - Energy scheduling:

    - Consolidate how the max compute capacity is
      used in the scheduler and how we calculate
      the frequency for a level of utilization.

    - Rework interface between the scheduler and
      the schedutil governor

    - Simplify the util_est logic

 - Deadline scheduler:

    - Work more towards reducing SCHED_DEADLINE
      starvation of low priority tasks (e.g., SCHED_OTHER)
      tasks when higher priority tasks monopolize CPU
      cycles, via the introduction of 'deadline servers'
      (nested/2-level scheduling).
      "Fair servers" to make use of this facility are
      not introduced yet.

 - EEVDF:

    - Introduce O(1) fastpath for EEVDF task selection

 - NUMA balancing:

    - Tune the NUMA-balancing vma scanning logic some more,
      to better distribute the probability
      of a particular vma getting scanned.

 - Plus misc fixes, cleanups and updates.

 Thanks,

	Ingo

------------------>
Abel Wu (2):
      sched/eevdf: Sort the rbtree by virtual deadline
      sched/eevdf: O(1) fastpath for task selection

Elliot Berman (1):
      freezer,sched: Clean saved_state when restoring it during thaw

Frederic Weisbecker (2):
      sched/cpuidle: Comment about timers requirements VS idle handler
      sched/timers: Explain why idle task schedules out on remote timer enqueue

Paul E. McKenney (1):
      sched: Use WRITE_ONCE() for p->on_rq

Peter Zijlstra (6):
      sched: Unify runtime accounting across classes
      sched: Remove vruntime from trace_sched_stat_runtime()
      sched: Unify more update_curr*()
      sched/deadline: Collect sched_dl_entity initialization
      sched/deadline: Move bandwidth accounting into {en,de}queue_dl_entity
      sched/deadline: Introduce deadline servers

Pierre Gondois (1):
      sched/fair: Use all little CPUs for CPU-bound workloads

Raghavendra K T (1):
      sched/numa: Fix mm numa_scan_seq based unconditional scan

Vincent Guittot (13):
      sched/pelt: Avoid underestimation of task utilization
      sched/cpufreq: Rework schedutil governor performance estimation
      sched/cpufreq: Rework iowait boost
      sched/topology: Add a new arch_scale_freq_ref() method
      cpufreq: Use the fixed and coherent frequency for scaling capacity
      cpufreq/schedutil: Use a fixed reference frequency
      energy_model: Use a fixed reference frequency
      cpufreq/cppc: Move and rename cppc_cpufreq_{perf_to_khz|khz_to_perf}()
      cpufreq/cppc: Set the frequency used for computing the capacity
      arm64/amu: Use capacity_ref_freq() to set AMU ratio
      sched/fair: Remove SCHED_FEAT(UTIL_EST_FASTUP, true)
      sched/fair: Simplify util_est
      sched/fair: Fix tg->load when offlining a CPU

Wang Jinchao (1):
      sched/fair: Remove unused 'next_buddy_marked' local variable in check_preempt_wakeup_fair()

Wenyu Huang (1):
      sched/doc: Update documentation after renames and synchronize Chinese version

Yiwei Lin (1):
      sched/fair: Update min_vruntime for reweight_entity() correctly


 Documentation/scheduler/sched-design-CFS.rst       |   8 +-
 Documentation/scheduler/schedutil.rst              |   7 +-
 .../zh_CN/scheduler/sched-design-CFS.rst           |   8 +-
 .../translations/zh_CN/scheduler/schedutil.rst     |   7 +-
 arch/arm/include/asm/topology.h                    |   1 +
 arch/arm64/include/asm/topology.h                  |   1 +
 arch/arm64/kernel/topology.c                       |  26 +-
 arch/riscv/include/asm/topology.h                  |   1 +
 drivers/acpi/cppc_acpi.c                           | 104 +++++
 drivers/base/arch_topology.c                       |  56 ++-
 drivers/cpufreq/cppc_cpufreq.c                     | 139 +-----
 drivers/cpufreq/cpufreq.c                          |   4 +-
 include/acpi/cppc_acpi.h                           |   2 +
 include/linux/arch_topology.h                      |   8 +
 include/linux/cpufreq.h                            |   1 +
 include/linux/energy_model.h                       |   7 +-
 include/linux/mm_types.h                           |   3 +
 include/linux/sched.h                              |  75 ++--
 include/linux/sched/topology.h                     |   8 +
 include/trace/events/sched.h                       |  15 +-
 kernel/freezer.c                                   |   1 +
 kernel/sched/core.c                                | 140 +++---
 kernel/sched/cpufreq_schedutil.c                   |  90 ++--
 kernel/sched/deadline.c                            | 477 +++++++++++++--------
 kernel/sched/debug.c                               |  18 +-
 kernel/sched/fair.c                                | 449 ++++++++++---------
 kernel/sched/features.h                            |   1 -
 kernel/sched/idle.c                                |  30 ++
 kernel/sched/pelt.h                                |   4 +-
 kernel/sched/rt.c                                  |  15 +-
 kernel/sched/sched.h                               | 135 ++----
 kernel/sched/stop_task.c                           |  13 +-
 32 files changed, 1054 insertions(+), 800 deletions(-)