[GIT PULL] scheduler updates for v5.6

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest sched-core-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-core-for-linus

   # HEAD: afa70d941f663c69c9a64ec1021bbcfa82f0e54a sched/fair: Define sched_idle_cpu() only for SMP configurations

These were the main changes in this cycle:

 - More -rt motivated separation of CONFIG_PREEMPT and CONFIG_PREEMPTION.

 - Add more low level scheduling topology sanity checks and warnings to 
   filter out nonsensical topologies that break scheduling.

 - Extend uclamp constraints to influence wakeup CPU placement

 - Make the RT scheduler more aware of asymmetric topologies and CPU 
   capacities, via uclamp metrics, if CONFIG_UCLAMP_TASK=y

 - Make idle CPU selection more consistent

 - Various fixes, smaller cleanups, updates and enhancements - please see 
   the git log for details.

 Thanks,

	Ingo

------------------>
Alex Shi (1):
      sched/cputime: move rq parameter in irqtime_account_process_tick

Cheng Jian (1):
      sched/fair: Optimize select_idle_cpu

Frederic Weisbecker (2):
      sched: Spare resched IPI when prio changes on a single fair task
      sched: Use fair:prio_changed() instead of ad-hoc implementation

Hewenliang (1):
      idle: fix spelling mistake "iterrupts" -> "interrupts"

Jisheng Zhang (1):
      watchdog: Remove soft_lockup_hrtimer_cnt and related code

Li Guanglei (1):
      sched/core: Fix size of rq::uclamp initialization

Oleg Nesterov (1):
      sched/wait: fix ___wait_var_event(exclusive)

Peng Liu (1):
      sched/fair: Fix sgc->{min,max}_capacity calculation for SD_OVERLAP

Peng Wang (2):
      schied/fair: Skip calculating @contrib without load
      sched/fair: calculate delta runnable load only when it's needed

Peter Zijlstra (1):
      cpu/hotplug, stop_machine: Fix stop_machine vs hotplug order

Qais Yousef (2):
      sched/rt: Make RT capacity-aware
      sched/uclamp: Fix a bug in propagating uclamp value in new cgroups

Qian Cai (1):
      sched/core: Remove unused variable from set_user_nice()

Sebastian Andrzej Siewior (3):
      sched/rt, locking: Use CONFIG_PREEMPTION
      sched/core: Use CONFIG_PREEMPTION
      sched/rt, workqueue: Use PREEMPTION

Thomas Gleixner (24):
      sched/rt, ARM: Use CONFIG_PREEMPTION
      sched/rt, arm64: Use CONFIG_PREEMPTION
      sched/rt, powerpc: Use CONFIG_PREEMPTION
      sched/rt, ARC: Use CONFIG_PREEMPTION
      sched/rt, c6x: Use CONFIG_PREEMPTION
      sched/rt, csky: Use CONFIG_PREEMPTION
      sched/rt, h8300: Use CONFIG_PREEMPTION
      sched/rt, hexagon: Use CONFIG_PREEMPTION
      sched/rt, ia64: Use CONFIG_PREEMPTION
      sched/rt, microblaze: Use CONFIG_PREEMPTION
      sched/rt, MIPS: Use CONFIG_PREEMPTION
      sched/rt, nds32: Use CONFIG_PREEMPTION
      sched/rt, nios2: Use CONFIG_PREEMPTION
      sched/rt, parisc: Use CONFIG_PREEMPTION
      sched/rt, riscv: Use CONFIG_PREEMPTION
      sched/rt, s390: Use CONFIG_PREEMPTION
      sched/rt, sh: Use CONFIG_PREEMPTION
      sched/rt, sparc: Use CONFIG_PREEMPTION
      sched/rt, xtensa: Use CONFIG_PREEMPTION
      sched/rt, net: Use CONFIG_PREEMPTION.patch
      sched/rt, xen: Use CONFIG_PREEMPTION
      sched/rt, fs: Use CONFIG_PREEMPTION
      sched/rt, btrfs: Use CONFIG_PREEMPTION
      sched/rt, mm: Use CONFIG_PREEMPTION

Valentin Schneider (6):
      sched/uclamp: Remove uclamp_util()
      sched/uclamp: Make uclamp util helpers use and return UL values
      sched/uclamp: Rename uclamp_util_with() into uclamp_rq_util_with()
      sched/fair: Make task_fits_capacity() consider uclamp restrictions
      sched/fair: Make EAS wakeup placement consider uclamp restrictions
      sched/topology: Assert non-NUMA topology masks don't (partially) overlap

Vincent Guittot (2):
      sched/fair : Improve update_sd_pick_busiest for spare capacity case
      sched/fair: Remove redundant call to cpufreq_update_util()

Viresh Kumar (3):
      sched/fair: Make sched-idle CPU selection consistent throughout
      sched/fair: Load balance aggressively for SCHED_IDLE CPUs
      sched/fair: Define sched_idle_cpu() only for SMP configurations

Wang Long (1):
      sched/psi: create /proc/pressure and /proc/pressure/{io|memory|cpu} only when psi enabled

Wei Li (1):
      sched/debug: Reset watchdog on all CPUs while processing sysrq-t

Yangtao Li (2):
      stop_machine: remove try_stop_cpus helper
      stop_machine: Make stop_cpus() static

Zhenzhong Duan (1):
      sched/clock: Use static_branch_likely() with sched_clock_running


 arch/arc/kernel/entry.S            |   6 +-
 arch/arm/include/asm/switch_to.h   |   2 +-
 arch/arm/kernel/entry-armv.S       |   4 +-
 arch/arm/kernel/traps.c            |   2 +
 arch/arm/mm/cache-v7.S             |   4 +-
 arch/arm/mm/cache-v7m.S            |   4 +-
 arch/arm64/Kconfig                 |  52 +++++------
 arch/arm64/crypto/sha256-glue.c    |   2 +-
 arch/arm64/include/asm/assembler.h |   6 +-
 arch/arm64/include/asm/preempt.h   |   4 +-
 arch/arm64/kernel/entry.S          |   2 +-
 arch/arm64/kernel/traps.c          |   3 +
 arch/c6x/kernel/entry.S            |   8 +-
 arch/csky/kernel/entry.S           |   4 +-
 arch/h8300/kernel/entry.S          |   6 +-
 arch/hexagon/kernel/vm_entry.S     |   6 +-
 arch/ia64/kernel/entry.S           |  12 +--
 arch/ia64/kernel/kprobes.c         |   2 +-
 arch/microblaze/kernel/entry.S     |   2 +-
 arch/mips/include/asm/asmmacro.h   |   4 +-
 arch/mips/kernel/entry.S           |   6 +-
 arch/nds32/Kconfig                 |   2 +-
 arch/nds32/kernel/ex-exit.S        |   4 +-
 arch/nios2/kernel/entry.S          |   2 +-
 arch/parisc/Kconfig                |   2 +-
 arch/parisc/kernel/entry.S         |  10 +--
 arch/powerpc/Kconfig               |   2 +-
 arch/powerpc/kernel/entry_32.S     |   4 +-
 arch/powerpc/kernel/entry_64.S     |   4 +-
 arch/riscv/kernel/entry.S          |   4 +-
 arch/s390/Kconfig                  |   2 +-
 arch/s390/include/asm/preempt.h    |   4 +-
 arch/s390/kernel/dumpstack.c       |   2 +
 arch/s390/kernel/entry.S           |   2 +-
 arch/sh/Kconfig                    |   2 +-
 arch/sh/kernel/cpu/sh5/entry.S     |   4 +-
 arch/sh/kernel/entry-common.S      |   4 +-
 arch/sparc/Kconfig                 |   2 +-
 arch/sparc/kernel/rtrap_64.S       |   2 +-
 arch/xtensa/kernel/entry.S         |   2 +-
 arch/xtensa/kernel/traps.c         |   7 +-
 drivers/xen/preempt.c              |   4 +-
 fs/btrfs/volumes.h                 |   2 +-
 fs/stack.c                         |   6 +-
 include/linux/fs.h                 |   4 +-
 include/linux/genhd.h              |   6 +-
 include/linux/sched/cpufreq.h      |   1 -
 include/linux/stop_machine.h       |  16 ----
 include/xen/xen-ops.h              |   4 +-
 kernel/Kconfig.locks               |  12 +--
 kernel/cpu.c                       |  13 ++-
 kernel/sched/clock.c               |   6 +-
 kernel/sched/core.c                |  34 +++++---
 kernel/sched/cpufreq_schedutil.c   |   2 +-
 kernel/sched/cpupri.c              |  25 +++++-
 kernel/sched/cpupri.h              |   4 +-
 kernel/sched/cputime.c             |  15 ++--
 kernel/sched/debug.c               |  11 ++-
 kernel/sched/fair.c                | 171 ++++++++++++++++++++-----------------
 kernel/sched/idle.c                |   2 +-
 kernel/sched/pelt.c                |  20 ++++-
 kernel/sched/psi.c                 |  10 ++-
 kernel/sched/rt.c                  |  83 ++++++++++++++----
 kernel/sched/sched.h               |  24 ++----
 kernel/sched/topology.c            |  39 +++++++++
 kernel/sched/wait_bit.c            |   1 +
 kernel/stop_machine.c              |  32 +------
 kernel/watchdog.c                  |   3 -
 kernel/workqueue.c                 |   2 +-
 lib/Kconfig.debug                  |   2 +-
 mm/memory.c                        |   2 +-
 mm/slub.c                          |  12 +--
 net/core/dev.c                     |   2 +-
 73 files changed, 446 insertions(+), 332 deletions(-)