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Date: Mon, 3 Aug 2020 16:55:19 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>
Subject: [GIT PULL] scheduler updates for v5.9
Linus,
Please pull the latest sched/core git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-core-2020-08-03
# HEAD: 949bcb8135a96a6923e676646bd29cbe69e8350f sched/doc: Factorize bits between sched-energy.rst & sched-capacity.rst
The main changes in this cycle were:
- Improve uclamp performance by using a static key for the fast path
- Add the "sched_util_clamp_min_rt_default" sysctl, to optimize for
better power efficiency of RT tasks on battery powered devices.
(The default is to maximize performance & reduce RT latencies.)
- Improve utime and stime tracking accuracy, which had a fixed boundary
of error, which created larger and larger relative errors as the values
become larger. This is now replaced with more precise arithmetics,
using the new mul_u64_u64_div_u64() helper in math64.h.
- Improve the deadline scheduler, such as making it capacity aware
- Improve frequency-invariant scheduling
- Misc cleanups in energy/power aware scheduling
- Add sched_update_nr_running tracepoint to track changes to nr_running
- Documentation additions and updates
- Misc cleanups and smaller fixes
Thanks,
Ingo
------------------>
Alex Belits (3):
lib: Restrict cpumask_local_spread to houskeeping CPUs
PCI: Restrict probe functions to housekeeping CPUs
net: Restrict receive packets queuing to housekeeping CPUs
Christophe JAILLET (1):
sched/deadline: Fix a typo in a comment
Dietmar Eggemann (6):
sched/pelt: Remove redundant cap_scale() definition
sched/core: Remove redundant 'preempt' param from sched_class->yield_to_task()
sched/idle,stop: Remove .get_rr_interval from sched_class
sched/fair: Remove unused 'sd' parameter from scale_rt_capacity()
sched/deadline: Optimize dl_bw_cpus()
sched/deadline: Add dl_bw_capacity()
Giovanni Gherdovich (3):
x86, sched: check for counters overflow in frequency invariant accounting
x86, sched: Bail out of frequency invariance if turbo frequency is unknown
x86, sched: Bail out of frequency invariance if turbo_freq/base_freq gives 0
Kirill Tkhai (1):
sched: Micro optimization in pick_next_task() and in check_preempt_curr()
Luca Abeni (3):
sched/deadline: Improve admission control for asymmetric CPU capacities
sched/deadline: Make DL capacity-aware
sched/deadline: Implement fallback mechanism for !fit case
Marcelo Tosatti (2):
kthread: Switch to cpu_possible_mask
isolcpus: Affine unbound kernel threads to housekeeping cpus
Miaohe Lin (1):
sched: Remove duplicated tick_nohz_full_enabled() check
Muchun Song (1):
smp: Fix a potential usage of stale nr_cpus
Oleg Nesterov (1):
sched/cputime: Improve cputime_adjust()
Paul Gortmaker (1):
sched: nohz: stop passing around unused "ticks" parameter.
Peng Liu (1):
sched: correct SD_flags returned by tl->sd_flags()
Peng Wang (1):
sched/fair: Optimize dequeue_task_fair()
Peter Puhov (1):
sched/fair: update_pick_idlest() Select group with lowest group_util when idle_cpus are equal
Peter Zijlstra (3):
sched/deadline: Impose global limits on sched_attr::sched_period
sched, vmlinux.lds: Increase STRUCT_ALIGNMENT to 64 bytes for GCC-4.9
sched: Better document ttwu()
Phil Auld (1):
sched: Add a tracepoint to track rq->nr_running
Qais Yousef (5):
sched/uclamp: Fix initialization of struct uclamp_rq
sched/uclamp: Protect uclamp fast path code with static key
sched/uclamp: Fix a deadlock when enabling uclamp static key
sched/uclamp: Add a new sysctl to control RT default boost value
Documentation/sysctl: Document uclamp sysctl knobs
Qinglang Miao (1):
sched/uclamp: Remove unnecessary mutex_init()
Randy Dunlap (2):
linux/sched/mm.h: drop duplicated words in comments
trace/events/sched.h: fix duplicated word
Sebastian Andrzej Siewior (1):
sched/core: Remove mmdrop() definition
Steven Rostedt (VMware) (3):
sched: Force the address order of each sched class descriptor
sched: Have sched_class_highest define by vmlinux.lds.h
sched: Remove struct sched_class::next field
Suren Baghdasaryan (1):
psi: eliminate kthread_worker from psi trigger scheduling mechanism
Valentin Schneider (7):
arch_topology, sched/core: Cleanup thermal pressure definition
sched: Cleanup SCHED_THERMAL_PRESSURE kconfig entry
arm, arm64: Select CONFIG_SCHED_THERMAL_PRESSURE
arm, arm64: Fix selection of CONFIG_SCHED_THERMAL_PRESSURE
sched: Document arch_scale_*_capacity()
sched/doc: Document capacity aware scheduling
sched/doc: Factorize bits between sched-energy.rst & sched-capacity.rst
Vincent Donnefort (1):
sched/debug: Add new tracepoints to track util_est
Vincent Guittot (2):
sched/fair: Fix NOHZ next idle balance
sched/pelt: Cleanup PELT divider
王文虎 (1):
sched: Fix a typo in a comment
Documentation/admin-guide/sysctl/kernel.rst | 54 ++++
Documentation/scheduler/index.rst | 1 +
Documentation/scheduler/sched-capacity.rst | 439 ++++++++++++++++++++++++++
Documentation/scheduler/sched-energy.rst | 12 +-
arch/arm/include/asm/topology.h | 3 +-
arch/arm64/include/asm/topology.h | 3 +-
arch/x86/include/asm/div64.h | 14 +-
arch/x86/include/asm/topology.h | 2 +-
arch/x86/kernel/smpboot.c | 50 ++-
drivers/base/arch_topology.c | 11 +
drivers/pci/pci-driver.c | 5 +-
include/asm-generic/vmlinux.lds.h | 24 +-
include/linux/arch_topology.h | 4 +-
include/linux/math64.h | 2 +
include/linux/psi_types.h | 7 +-
include/linux/sched.h | 25 +-
include/linux/sched/isolation.h | 1 +
include/linux/sched/loadavg.h | 2 +-
include/linux/sched/mm.h | 8 +-
include/linux/sched/sysctl.h | 4 +
include/linux/sched/task.h | 1 +
include/linux/sched/topology.h | 17 +
include/trace/events/sched.h | 14 +-
init/Kconfig | 17 +-
kernel/fork.c | 1 +
kernel/kthread.c | 6 +-
kernel/sched/core.c | 466 +++++++++++++++++++++++-----
kernel/sched/cpudeadline.c | 24 ++
kernel/sched/cpufreq_schedutil.c | 2 +-
kernel/sched/cputime.c | 46 +--
kernel/sched/deadline.c | 118 +++++--
kernel/sched/fair.c | 93 ++++--
kernel/sched/idle.c | 11 +-
kernel/sched/isolation.c | 3 +-
kernel/sched/loadavg.c | 2 +-
kernel/sched/pelt.c | 6 +-
kernel/sched/pelt.h | 5 +
kernel/sched/psi.c | 113 ++++---
kernel/sched/rt.c | 4 +-
kernel/sched/sched.h | 126 ++++++--
kernel/sched/stop_task.c | 12 +-
kernel/sched/topology.c | 2 +-
kernel/smp.c | 3 +-
kernel/sysctl.c | 21 ++
kernel/time/timekeeping.c | 2 +-
lib/cpumask.c | 16 +-
lib/math/div64.c | 41 +++
net/core/net-sysfs.c | 10 +-
48 files changed, 1521 insertions(+), 332 deletions(-)
create mode 100644 Documentation/scheduler/sched-capacity.rst
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