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Date: Mon, 16 Sep 2019 14:30:47 +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>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Steven Rostedt <rostedt@...dmis.org>,
Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>
Subject: [GIT PULL] scheduler changes for v5.4
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: 563c4f85f9f0d63b712081d5b4522152cdcb8b6b Merge branch 'sched/rt' into sched/core, to pick up -rt changes
The main changes in this cycle were:
- MAINTAINERS: Add Mark Rutland as perf submaintainer, Juri Lelli and
Vincent Guittot as scheduler submaintainers. Add Dietmar Eggemann,
Steven Rostedt, Ben Segall and Mel Gorman as scheduler reviewers.
As perf and the scheduler is getting bigger and more complex, document
the status quo of current responsibilities and interests, and spread
the review pain^H^H^H^H fun via an increase in the Cc: linecount
generated by scripts/get_maintainer.pl. :-)
- Add another series of patches that brings the -rt (PREEMPT_RT) tree
closer to mainline: split the monolithic CONFIG_PREEMPT dependencies
into a new CONFIG_PREEMPTION category that will allow the eventual
introduction of CONFIG_PREEMPT_RT. Still a few more hundred patches to
go though.
- Extend the CPU cgroup controller with uclamp.min and uclamp.max to
allow the finer shaping of CPU bandwidth usage.
- Micro-optimize energy-aware wake-ups from O(CPUS^2) to O(CPUS).
- Improve the behavior of high CPU count, high thread count applications
running under cpu.cfs_quota_us constraints.
- Improve balancing with SCHED_IDLE (SCHED_BATCH) tasks present.
- Improve CPU isolation housekeeping CPU allocation NUMA locality.
- Fix deadline scheduler bandwidth calculations and logic when cpusets
rebuilds the topology, or when it gets deadline-throttled while it's
being offlined.
- Convert the cpuset_mutex to percpu_rwsem, to allow it to be used from
setscheduler() system calls without creating global serialization. Add
new synchronization between cpuset topology-changing events and the
deadline acceptance tests in setscheduler(), which were broken before.
- Rework the active_mm state machine to be less confusing and more
optimal.
- Rework (simplify) the pick_next_task() slowpath.
- Improve load-balancing on AMD EPYC systems.
- ... and misc cleanups, smaller fixes and improvements - please see the
Git log for more details.
Thanks,
Ingo
------------------>
Dave Chiluk (1):
sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices
Juri Lelli (6):
sched/deadline: Fix bandwidth accounting at all levels after offline migration
cgroup/cpuset: Convert cpuset_mutex to percpu_rwsem
cgroup/cpuset: Change cpuset_rwsem and hotplug lock order
rcu/tree: Call setschedule() gp ktread to SCHED_FIFO outside of atomic region
sched/core: Prevent race condition between cpuset and __sched_setscheduler()
sched/core: Fix CPU controller for !RT_GROUP_SCHED
Mathieu Poirier (3):
sched/topology: Add partition_sched_domains_locked()
sched/core: Streamle calls to task_rq_unlock()
cpusets: Rebuild root domain deadline accounting information
Matt Fleming (2):
arch, ia64: Make NUMA select SMP
sched/topology: Improve load balancing on AMD EPYC systems
Matthew Wilcox (Oracle) (1):
sched/core: Convert get_task_struct() to return the task
Miles Chen (1):
sched/psi: Correct overly pessimistic size calculation
Patrick Bellasi (6):
sched/uclamp: Extend CPU's cgroup controller
sched/uclamp: Propagate parent clamps
sched/uclamp: Propagate system defaults to the root group
sched/uclamp: Use TG's clamps to restrict TASK's clamps
sched/uclamp: Update CPU's refcount on TG's clamp changes
sched/uclamp: Always use 'enum uclamp_id' for clamp_id values
Paul E. McKenney (1):
time/tick-broadcast: Fix tick_broadcast_offline() lockdep complaint
Peter Zijlstra (11):
rcu/tree: Fix SCHED_FIFO params
sched: Clean up active_mm reference counting
stop_machine: Fix stop_cpus_in_progress ordering
sched: Fix kerneldoc comment for ia64_set_curr_task
sched/{rt,deadline}: Fix set_next_task vs pick_next_task
sched: Rework CPU hotplug task selection
sched: Add task_struct pointer to sched_class::set_curr_task
sched/fair: Expose newidle_balance()
sched: Allow put_prev_task() to drop rq->lock
sched: Rework pick_next_task() slow-path
sched, perf: MAINTAINERS update, add submaintainers and reviewers
Phil Auld (1):
sched/fair: Use rq_lock/unlock in online_fair_sched_group
Qais Yousef (1):
cpufreq: schedutil: fix equation in comment
Qian Cai (1):
sched/core: Silence a warning in sched_init()
Quentin Perret (1):
sched/fair: Speed-up energy-aware wake-ups
Thomas Gleixner (8):
sched/preempt: Use CONFIG_PREEMPTION where appropriate
rcu: Use CONFIG_PREEMPTION
locking/spinlocks: Use CONFIG_PREEMPTION
tracing: Use CONFIG_PREEMPTION
kprobes: Use CONFIG_PREEMPTION
x86: Use CONFIG_PREEMPTION
x86/dumpstack: Indicate PREEMPT_RT in dumps
x86/kvm: Use CONFIG_PREEMPTION
Valentin Schneider (3):
sched/fair: Move init_numa_balancing() below task_numa_work()
sched/fair: Move task_numa_work() init to init_numa_balancing()
sched/fair: Change task_numa_work() storage to static
Vincent Guittot (1):
sched/fair: Fix imbalance due to CPU affinity
Viresh Kumar (3):
sched/fair: Start tracking SCHED_IDLE tasks count in cfs_rq
sched/fair: Fall back to sched-idle CPU if idle CPU isn't found
sched/fair: Introduce fits_capacity()
Wanpeng Li (1):
sched/isolation: Prefer housekeeping CPU in local node
Yi Wang (1):
sched/stats: Fix unlikely() use of sched_info_on()
Documentation/admin-guide/cgroup-v2.rst | 34 ++
Documentation/scheduler/sched-bwc.rst | 74 +++-
MAINTAINERS | 7 +
arch/Kconfig | 2 +-
arch/ia64/Kconfig | 1 +
arch/x86/entry/entry_32.S | 6 +-
arch/x86/entry/entry_64.S | 4 +-
arch/x86/entry/thunk_32.S | 2 +-
arch/x86/entry/thunk_64.S | 4 +-
arch/x86/include/asm/preempt.h | 2 +-
arch/x86/kernel/cpu/amd.c | 5 +
arch/x86/kernel/dumpstack.c | 7 +-
arch/x86/kernel/kprobes/core.c | 2 +-
arch/x86/kernel/kvm.c | 2 +-
include/asm-generic/preempt.h | 4 +-
include/linux/cgroup.h | 1 +
include/linux/cpuset.h | 13 +-
include/linux/preempt.h | 6 +-
include/linux/rcupdate.h | 2 +-
include/linux/rcutree.h | 2 +-
include/linux/sched.h | 11 +-
include/linux/sched/deadline.h | 8 +
include/linux/sched/task.h | 6 +-
include/linux/sched/topology.h | 10 +
include/linux/spinlock.h | 2 +-
include/linux/spinlock_api_smp.h | 2 +-
include/linux/topology.h | 14 +
include/linux/torture.h | 2 +-
init/Kconfig | 22 ++
init/init_task.c | 2 +-
init/main.c | 2 +-
kernel/cgroup/cgroup.c | 2 +-
kernel/cgroup/cpuset.c | 163 +++++++--
kernel/events/core.c | 9 +-
kernel/irq/manage.c | 3 +-
kernel/kprobes.c | 2 +-
kernel/locking/rtmutex.c | 6 +-
kernel/rcu/Kconfig | 8 +-
kernel/rcu/tree.c | 12 +-
kernel/rcu/tree_stall.h | 6 +-
kernel/sched/core.c | 618 ++++++++++++++++++++++++++------
kernel/sched/cpufreq_schedutil.c | 6 +-
kernel/sched/deadline.c | 134 ++++---
kernel/sched/fair.c | 409 ++++++++++-----------
kernel/sched/idle.c | 31 +-
kernel/sched/isolation.c | 12 +-
kernel/sched/psi.c | 2 +-
kernel/sched/rt.c | 74 ++--
kernel/sched/sched.h | 63 ++--
kernel/sched/stats.h | 7 +-
kernel/sched/stop_task.c | 22 +-
kernel/sched/topology.c | 53 ++-
kernel/stop_machine.c | 2 +
kernel/trace/Kconfig | 6 +-
kernel/trace/ftrace.c | 2 +-
kernel/trace/ring_buffer_benchmark.c | 2 +-
kernel/trace/trace_events.c | 4 +-
kernel/trace/trace_sched_wakeup.c | 3 +-
mm/khugepaged.c | 2 +-
mm/page_alloc.c | 2 +-
60 files changed, 1323 insertions(+), 603 deletions(-)
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