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Date: Sat, 28 Oct 2023 14:23:34 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
Peter Zijlstra <peterz@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>,
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>,
Daniel Bristot de Oliveira <bristot@...hat.com>,
Valentin Schneider <vschneid@...hat.com>
Subject: [GIT PULL] Scheduler changes for v6.7
Linus,
Please pull the latest sched/core git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-core-2023-10-28
# HEAD: 984ffb6a4366752c949f7b39640aecdce222607f sched/fair: Remove SIS_PROP
Scheduler changes for v6.7 are:
- Fair scheduler (SCHED_OTHER) improvements:
- Remove the old and now unused SIS_PROP code & option
- Scan cluster before LLC in the wake-up path
- Use candidate prev/recent_used CPU if scanning failed for cluster wakeup
- NUMA scheduling improvements:
- Improve the VMA access-PID code to better skip/scan VMAs
- Extend tracing to cover VMA-skipping decisions
- Improve/fix the recently introduced sched_numa_find_nth_cpu() code
- Generalize numa_map_to_online_node()
- Energy scheduling improvements:
- Remove the EM_MAX_COMPLEXITY limit
- Add tracepoints to track energy computation
- Make the behavior of the 'sched_energy_aware' sysctl more consistent
- Consolidate and clean up access to a CPU's max compute capacity
- Fix uclamp code corner cases
- RT scheduling improvements:
- Drive dl_rq->overloaded with dl_rq->pushable_dl_tasks updates
- Drive the ->rto_mask with rt_rq->pushable_tasks updates
- Scheduler scalability improvements:
- Rate-limit updates to tg->load_avg
- On x86 disable IBRS when CPU is offline to improve single-threaded performance
- Micro-optimize in_task() and in_interrupt()
- Micro-optimize the PSI code
- Avoid updating PSI triggers and ->rtpoll_total when there are no state changes
- Core scheduler infrastructure improvements:
- Use saved_state to reduce some spurious freezer wakeups
- Bring in a handful of fast-headers improvements to scheduler headers
- Make the scheduler UAPI headers more widely usable by user-space
- Simplify the control flow of scheduler syscalls by using lock guards
- Fix sched_setaffinity() vs. CPU hotplug race
- Scheduler debuggability improvements:
- Disallow writing invalid values to sched_rt_period_us
- Fix a race in the rq-clock debugging code triggering warnings
- Fix a warning in the bandwidth distribution code
- Micro-optimize in_atomic_preempt_off() checks
- Enforce that the tasklist_lock is held in for_each_thread()
- Print the TGID in sched_show_task()
- Remove the /proc/sys/kernel/sched_child_runs_first sysctl
- Misc cleanups & fixes
Thanks,
Ingo
------------------>
Aaron Lu (1):
sched/fair: Ratelimit update to tg->load_avg
Barry Song (2):
sched: Add cpus_share_resources API
sched/fair: Scan cluster before scanning LLC in wake-up path
Chengming Zhou (1):
sched/fair: Fix cfs_rq_is_decayed() on !SMP
Colin Ian King (1):
sched/headers: Remove comment referring to rq::cpu_load, since this has been removed
Cyril Hrubis (3):
sched/rt: Disallow writing invalid values to sched_rt_period_us
sched/rt/docs: Clarify & fix sched_rt_* sysctl docs
sched/rt/docs: Use 'real-time' instead of 'realtime'
Elliot Berman (2):
sched/core: Remove ifdeffery for saved_state
freezer,sched: Use saved_state to reduce some spurious wakeups
Fan Yu (1):
sched/psi: Update poll => rtpoll in relevant comments
Finn Thain (1):
sched/core: Optimize in_task() and in_interrupt() a bit
GUO Zihua (1):
sched/headers: Remove duplicated includes in kernel/sched/sched.h
Haifeng Xu (1):
sched/psi: Bail out early from irq time accounting
Hao Jia (1):
sched/core: Fix RQCF_ACT_SKIP leak
Ingo Molnar (12):
sched/fair: Rename check_preempt_wakeup() to check_preempt_wakeup_fair()
sched/fair: Rename check_preempt_curr() to wakeup_preempt()
sched/headers: Add header guard to <linux/sched/deadline.h>
sched/headers: Standardize the <linux/sched/vhost_task.h> header guard name
sched/headers: Standardize the <linux/sched/type.h> header guard #endif
sched/headers: Standardize the <linux/sched/smt.h> header guard #endif
<linux/list.h>: Introduce the list_for_each_reverse() method
sched/core: Update stale comment in try_to_wake_up()
sched/nohz: Update idle load-balancing (ILB) comments
sched/nohz: Use consistent variable names in find_new_ilb() and kick_ilb()
sched/nohz: Remove unnecessarily complex error handling pattern from find_new_ilb()
sched/topology: Move the declaration of 'schedutil_gov' to kernel/sched/sched.h
Jiapeng Chong (1):
sched/fair: Remove duplicate #include
Joel Fernandes (Google) (1):
sched/nohz: Update comments about NEWILB_KICK
Josh Don (2):
sched/fair: Make cfs_rq->throttled_csd_list available on !SMP
sched/fair: Fix warning in bandwidth distribution
Kir Kolyshkin (1):
sched/headers: Move 'struct sched_param' out of uapi, to work around glibc/musl breakage
Liming Wu (1):
sched/debug: Avoid checking in_atomic_preempt_off() twice in schedule_debug()
Mathieu Desnoyers (1):
sched: Make PELT acronym definition searchable
Matthew Wilcox (Oracle) (1):
sched: Assert for_each_thread() is properly locked
Mel Gorman (5):
sched/numa: Document vma_numab_state fields
sched/numa: Rename vma_numab_state::access_pids[] => ::pids_active[], ::next_pid_reset => ::pids_active_reset
sched/numa: Trace decisions related to skipping VMAs
sched/numa: Complete scanning of partial VMAs regardless of PID activity
sched/numa: Complete scanning of inactive VMAs when there is no alternative
Peter Zijlstra (11):
sched: Simplify set_user_nice()
sched: Simplify syscalls
sched: Simplify sched_{set,get}affinity()
sched: Simplify yield_to()
sched: Simplify sched_rr_get_interval()
sched: Simplify sched_move_task()
sched: Simplify tg_set_cfs_bandwidth()
sched: Misc cleanups
sched/topology: Rename 'DIE' domain to 'PKG'
sched: Fix stop_one_cpu_nowait() vs hotplug
sched/fair: Remove SIS_PROP
Pierre Gondois (1):
sched/topology: Remove the EM_MAX_COMPLEXITY limit
Qais Yousef (3):
sched/uclamp: Set max_spare_cap_cpu even if max_spare_cap is 0
sched/uclamp: Ignore (util == 0) optimization in feec() when p_util_max = 0
sched/debug: Add new tracepoint to track compute energy computation
Raghavendra K T (1):
sched/numa: Move up the access pid reset logic
Sebastian Andrzej Siewior (2):
sched/debug: Remove the /proc/sys/kernel/sched_child_runs_first sysctl
sched/debug: Update stale reference to sched_debug.c
Shrikanth Hegde (1):
sched/topology: Change behaviour of the 'sched_energy_aware' sysctl, based on the platform
Uros Bizjak (1):
sched/core: Use do-while instead of for loop in set_nr_if_polling()
Valentin Schneider (2):
sched/rt: Make rt_rq->pushable_tasks updates drive rto_mask
sched/deadline: Make dl_rq->pushable_dl_tasks update drive dl_rq->overloaded
Vincent Guittot (1):
sched/topology: Consolidate and clean up access to a CPU's max compute capacity
Waiman Long (4):
x86/speculation: Add __update_spec_ctrl() helper
x86/idle: Disable IBRS when CPU is offline to improve single-threaded performance
intel_idle: Use __update_spec_ctrl() in intel_idle_ibrs()
intel_idle: Add ibrs_off module parameter to force-disable IBRS
Wang Jinchao (1):
sched/core: Refactor the task_flags check for worker sleeping in sched_submit_work()
Yajun Deng (2):
sched/debug: Print 'tgid' in sched_show_task()
sched/rt: Change the type of 'sysctl_sched_rt_period' from 'unsigned int' to 'int'
Yang Yang (3):
sched/psi: Change update_triggers() to a 'void' function
sched/psi: Avoid updating PSI triggers and ->rtpoll_total when there are no state changes
sched/psi: Delete the 'update_total' function parameter from update_triggers()
Yicong Yang (1):
sched/fair: Use candidate prev/recent_used CPU if scanning failed for cluster wakeup
Yiwei Lin (1):
sched/fair: Remove unused 'curr' argument from pick_next_entity()
Yu Liao (1):
sched/headers: Remove duplicate header inclusions
Yury Norov (6):
numa: Generalize numa_map_to_online_node()
sched/fair: Fix open-coded numa_nearest_node()
sched/topology: Fix sched_numa_find_nth_cpu() in CPU-less case
sched/topology: Fix sched_numa_find_nth_cpu() in non-NUMA case
sched/topology: Handle NUMA_NO_NODE in sched_numa_find_nth_cpu()
sched/topology: Fix sched_numa_find_nth_cpu() comment
Documentation/admin-guide/pm/intel_idle.rst | 17 +-
Documentation/admin-guide/sysctl/kernel.rst | 3 +-
Documentation/scheduler/sched-capacity.rst | 13 +-
Documentation/scheduler/sched-energy.rst | 29 +-
Documentation/scheduler/sched-rt-group.rst | 40 +-
arch/powerpc/kernel/smp.c | 4 +-
arch/s390/kernel/topology.c | 2 +-
arch/x86/include/asm/spec-ctrl.h | 11 +
arch/x86/kernel/smpboot.c | 12 +-
drivers/idle/intel_idle.c | 18 +-
include/linux/cpu.h | 2 +
include/linux/list.h | 8 +
include/linux/mm.h | 4 +-
include/linux/mm_types.h | 31 +-
include/linux/numa.h | 7 +-
include/linux/preempt.h | 15 +-
include/linux/sched.h | 7 +-
include/linux/sched/deadline.h | 4 +
include/linux/sched/numa_balancing.h | 10 +
include/linux/sched/sd_flags.h | 7 +
include/linux/sched/signal.h | 3 +-
include/linux/sched/smt.h | 2 +-
include/linux/sched/topology.h | 10 +-
include/linux/sched/types.h | 2 +-
include/linux/sched/vhost_task.h | 7 +-
include/linux/topology.h | 2 +-
include/trace/events/sched.h | 57 +++
include/uapi/linux/sched/types.h | 4 -
kernel/freezer.c | 41 +-
kernel/sched/build_utility.c | 1 -
kernel/sched/core.c | 651 ++++++++++++----------------
kernel/sched/cpudeadline.c | 2 +-
kernel/sched/deadline.c | 73 +---
kernel/sched/debug.c | 7 +-
kernel/sched/fair.c | 432 ++++++++++--------
kernel/sched/features.h | 1 -
kernel/sched/idle.c | 4 +-
kernel/sched/pelt.c | 2 +-
kernel/sched/psi.c | 58 ++-
kernel/sched/rt.c | 95 ++--
kernel/sched/sched.h | 45 +-
kernel/sched/stop_task.c | 4 +-
kernel/sched/topology.c | 213 +++++----
lib/cpumask.c | 4 +-
mm/mempolicy.c | 18 +-
45 files changed, 1015 insertions(+), 967 deletions(-)
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