[GIT PULL] scheduler changes for v5.8

[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-2020-06-02

   # HEAD: 25de110d148666752dc0e0da7a0b69de31cd7098 irq_work: Define irq_work_single() on !CONFIG_IRQ_WORK too

The changes in this cycle are:

 - Optimize the task wakeup CPU selection logic, to improve scalability and
   reduce wakeup latency spikes

 - PELT enhancements

 - CFS bandwidth handling fixes

 - Optimize the wakeup path by remove rq->wake_list and replacing it with ->ttwu_pending

 - Optimize IPI cross-calls by making flush_smp_call_function_queue()
   process sync callbacks first.

 - Misc fixes and enhancements.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 Thanks,

	Ingo

------------------>
Chen Yu (2):
      sched: Make newidle_balance() static again
      sched: Extract the task putting code from pick_next_task()

Davidlohr Bueso (1):
      sched/swait: Reword some of the main description

Gustavo A. R. Silva (1):
      sched/fair: Replace zero-length array with flexible-array

Huaixin Chang (2):
      sched/fair: Refill bandwidth before scaling
      sched: Defend cfs and rt bandwidth quota against overflow

Ingo Molnar (4):
      Merge branch 'sched/urgent' into sched/core, to pick up fix
      Merge branch 'core/rcu' into sched/core, to pick up dependency
      sched/headers: Split out open-coded prototypes into kernel/sched/smp.h
      irq_work: Define irq_work_single() on !CONFIG_IRQ_WORK too

Jann Horn (1):
      exit: Move preemption fixup up, move blocking operations down

Josh Don (1):
      sched/fair: Remove distribute_running from CFS bandwidth

Mel Gorman (1):
      sched/core: Offload wakee task activation if it the wakee is descheduling

Muchun Song (4):
      sched/fair: Mark sched_init_granularity __init
      sched/fair: Use __this_cpu_read() in wake_wide()
      sched/cpuacct: Use __this_cpu_add() instead of this_cpu_ptr()
      sched/cpuacct: Fix charge cpuacct.usage_sys

Paul Turner (1):
      sched/fair: Eliminate bandwidth race between throttling and distribution

Peng Wang (1):
      sched/fair: Simplify the code of should_we_balance()

Peter Zijlstra (10):
      sched/core: Fix illegal RCU from offline CPUs
      Merge branch 'sched/urgent'
      sched/core: Optimize ttwu() spinning on p->on_cpu
      sched: Fix smp_call_function_single_async() usage for ILB
      smp: Optimize flush_smp_call_function_queue()
      smp: Move irq_work_run() out of flush_smp_call_function_queue()
      smp: Optimize send_call_function_single_ipi()
      irq_work, smp: Allow irq_work on call_single_queue
      sched: Add rq::ttwu_pending
      sched: Replace rq::wake_list

Peter Zijlstra (Intel) (1):
      sched: Clean up scheduler_ipi()

Thomas Gleixner (1):
      sched: Make scheduler_ipi inline

Valentin Schneider (4):
      sched/fair: find_idlest_group(): Remove unused sd_flag parameter
      sched/debug: Make sd->flags sysctl read-only
      sched: Remove checks against SD_LOAD_BALANCE
      sched/topology: Kill SD_LOAD_BALANCE

Vincent Guittot (2):
      sched/fair: Optimize enqueue_task_fair()
      sched/pelt: Sync util/runnable_sum with PELT window when propagating

Wei Yang (1):
      sched/core: Simplify sched_init()

Xie XiuQi (1):
      sched/debug: Fix trival print_task() format

 arch/powerpc/platforms/powernv/smp.c |   1 -
 include/linux/irq_work.h             |   9 +++++++-
 include/linux/sched.h                |  11 +++++++++-
 include/linux/sched/mm.h             |   2 ++
 include/linux/sched/topology.h       |  29 +++++++++++++-------------
 include/linux/smp.h                  |  24 +++++++++++++++++++++-
 include/linux/swait.h                |  23 +++++----------------
 kernel/cpu.c                         |  18 +++++++++++++++-
 kernel/exit.c                        |  25 +++++++++++++++--------
 kernel/irq_work.c                    |  53 +++++++++++++++++++++++++----------------------
 kernel/sched/core.c                  | 248 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------------------------------------------------------------------------------
 kernel/sched/cpuacct.c               |   7 ++++---
 kernel/sched/debug.c                 |   9 ++++----
 kernel/sched/fair.c                  | 259 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------------------------------------------------------------------------------------------------------------------
 kernel/sched/idle.c                  |   6 +++++-
 kernel/sched/pelt.c                  |  24 ++++++++++++++++++++++
 kernel/sched/rt.c                    |  12 ++++++++++-
 kernel/sched/sched.h                 |  36 +++++++++++++++-----------------
 kernel/sched/smp.h                   |   9 ++++++++
 kernel/sched/topology.c              |  31 +++++++++-------------------
 kernel/smp.c                         | 175 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------------------------------------
 21 files changed, 603 insertions(+), 408 deletions(-)
 create mode 100644 kernel/sched/smp.h