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From: Vincent Guittot <vincent.guittot@linaro.org>
Date: Mon, 13 May 2024 09:43:25 +0200
Message-ID: <CAKfTPtB01UKskH_a1h1LtjoRq6O3NnqQuuh1L50O-yHRLQm-iw@mail.gmail.com>
Subject: Re: [GIT PULL] Scheduler changes for v6.10
To: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>, linux-kernel@vger.kernel.org, 
	Peter Zijlstra <peterz@infradead.org>, Thomas Gleixner <tglx@linutronix.de>, 
	Juri Lelli <juri.lelli@redhat.com>, Dietmar Eggemann <dietmar.eggemann@arm.com>, 
	Steven Rostedt <rostedt@goodmis.org>, Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>, 
	Daniel Bristot de Oliveira <bristot@redhat.com>, Valentin Schneider <vschneid@redhat.com>, 
	Shrikanth Hegde <sshegde@linux.ibm.com>
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Hi Ingo,

On Mon, 13 May 2024 at 08:35, Ingo Molnar <mingo@kernel.org> wrote:
>
> Linus,
>
> Please pull the latest sched/core Git tree from:
>
>    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-core-2024-05-13
>
>    # HEAD: 97450eb909658573dcacc1063b06d3d08642c0c1 sched/pelt: Remove shift of thermal clock
>
> Scheduler changes for v6.10:
>
>  - Add cpufreq pressure feedback for the scheduler
>
>  - Rework misfit load-balancing wrt. affinity restrictions
>
>  - Clean up and simplify the code around ::overutilized and
>    ::overload access.
>
>  - Simplify sched_balance_newidle()
>
>  - Bump SCHEDSTAT_VERSION to 16 due to a cleanup of CPU_MAX_IDLE_TYPES
>    handling that changed the output.
>
>  - Rework & clean up <asm/vtime.h> interactions wrt. arch_vtime_task_switch()
>
>  - Reorganize, clean up and unify most of the higher level
>    scheduler balancing function names around the sched_balance_*()
>    prefix.
>
>  - Simplify the balancing flag code (sched_balance_running)
>
>  - Miscellaneous cleanups & fixes
>
>  Thanks,
>
>         Ingo
>
> ------------------>
> Alexander Gordeev (5):
>       sched/vtime: Remove confusing arch_vtime_task_switch() declaration
>       sched/vtime: Get rid of generic vtime_task_switch() implementation
>       s390/vtime: Remove unused __ARCH_HAS_VTIME_TASK_SWITCH leftover
>       s390/irq,nmi: Include <asm/vtime.h> header directly
>       sched/vtime: Do not include <asm/vtime.h> header
>
> Ingo Molnar (28):
>       sched/balancing: Switch the 'DEFINE_SPINLOCK(balancing)' spinlock into an 'atomic_t sched_balance_running' flag
>       sched/balancing: Change 'enum cpu_idle_type' to have more natural definitions
>       sched/debug: Increase SCHEDSTAT_VERSION to 16
>       sched/debug: Allow CONFIG_SCHEDSTATS even on !KERNEL_DEBUG kernels
>       sched/balancing: Change comment formatting to not overlap Git conflict marker lines
>       sched/balancing: Fix comments (trying to) refer to NOHZ_BALANCE_KICK
>       sched/balancing: Update run_rebalance_domains() comments
>       sched/balancing: Vertically align the comments of 'struct sg_lb_stats' and 'struct sd_lb_stats'
>       sched/balancing: Update comments in 'struct sg_lb_stats' and 'struct sd_lb_stats'
>       sched/balancing: Rename run_rebalance_domains() => sched_balance_softirq()
>       sched/balancing: Rename scheduler_tick() => sched_tick()
>       sched/balancing: Rename trigger_load_balance() => sched_balance_trigger()
>       sched/balancing: Rename rebalance_domains() => sched_balance_domains()
>       sched/balancing: Rename load_balance() => sched_balance_rq()
>       sched/balancing: Rename find_busiest_queue() => sched_balance_find_src_rq()
>       sched/balancing: Rename find_busiest_group() => sched_balance_find_src_group()
>       sched/balancing: Rename update_blocked_averages() => sched_balance_update_blocked_averages()
>       sched/balancing: Rename newidle_balance() => sched_balance_newidle()
>       sched/balancing: Rename find_idlest_group_cpu() => sched_balance_find_dst_group_cpu()
>       sched/balancing: Rename find_idlest_group() => sched_balance_find_dst_group()
>       sched/balancing: Rename find_idlest_cpu() => sched_balance_find_dst_cpu()
>       sched/balancing: Fix a couple of outdated function names in comments
>       sched/fair: Fix typos in comments
>       sched/fair: Rename root_domain::overload to ::overloaded
>       sched/fair: Rename {set|get}_rd_overload() to {set|get}_rd_overloaded()
>       sched/fair: Rename SG_OVERLOAD to SG_OVERLOADED
>       sched/fair: Rename set_rd_overutilized_status() to set_rd_overutilized()
>       sched/balancing: Simplify the sg_status bitmask and use separate ->overloaded and ->overutilized flags
>
> Qais Yousef (4):
>       sched/topology: Export asym_cap_list
>       sched/fair: Check if a task has a fitting CPU when updating misfit
>       sched/topology: Remove root_domain::max_cpu_capacity
>       sched/fair: Don't double balance_interval for migrate_misfit
>
> Shrikanth Hegde (7):
>       sched/balancing: Remove reliance on 'enum cpu_idle_type' ordering when iterating [CPU_MAX_IDLE_TYPES] arrays in show_schedstat()
>       sched/fair: Add EAS checks before updating root_domain::overutilized
>       sched/fair: Introduce is_rd_overutilized() helper function to access root_domain::overutilized
>       sched/fair: Simplify the continue_balancing logic in sched_balance_newidle()
>       sched/fair: Combine EAS check with root_domain::overutilized access
>       sched/fair: Check root_domain::overload value before update
>       sched/fair: Use helper functions to access root_domain::overload
>
> Vincent Guittot (6):
>       sched/fair: Fix update of rd->sg_overutilized
>       cpufreq: Add a cpufreq pressure feedback for the scheduler
>       sched/cpufreq: Take cpufreq feedback into account
>       thermal/cpufreq: Remove arch_update_thermal_pressure()
>       sched/cpufreq: Rename arch_update_thermal_pressure() => arch_update_hw_pressure()

There is a fix for the one above:
 https://lore.kernel.org/lkml/20240425073709.379016-1-vincent.guittot@linaro.org/

>       sched/pelt: Remove shift of thermal clock
>
>
>  Documentation/admin-guide/kernel-parameters.txt    |   1 +
>  Documentation/scheduler/sched-domains.rst          |  12 +-
>  Documentation/scheduler/sched-stats.rst            |  37 +-
>  .../translations/zh_CN/scheduler/sched-domains.rst |  10 +-
>  .../translations/zh_CN/scheduler/sched-stats.rst   |  30 +-
>  arch/arm/include/asm/topology.h                    |   6 +-
>  arch/arm/kernel/topology.c                         |   2 +-
>  arch/arm64/include/asm/topology.h                  |   6 +-
>  arch/powerpc/include/asm/Kbuild                    |   1 -
>  arch/powerpc/include/asm/cputime.h                 |  13 -
>  arch/powerpc/kernel/time.c                         |  22 +
>  arch/s390/include/asm/vtime.h                      |   2 -
>  arch/s390/kernel/irq.c                             |   1 +
>  arch/s390/kernel/nmi.c                             |   1 +
>  drivers/base/arch_topology.c                       |  26 +-
>  drivers/cpufreq/cpufreq.c                          |  36 ++
>  drivers/cpufreq/qcom-cpufreq-hw.c                  |   4 +-
>  drivers/thermal/cpufreq_cooling.c                  |   3 -
>  include/asm-generic/vtime.h                        |   1 -
>  include/linux/arch_topology.h                      |   8 +-
>  include/linux/cpufreq.h                            |  10 +
>  include/linux/sched.h                              |   3 +-
>  include/linux/sched/idle.h                         |   2 +-
>  include/linux/sched/topology.h                     |  10 +-
>  include/linux/vtime.h                              |   5 -
>  .../events/{thermal_pressure.h => hw_pressure.h}   |  14 +-
>  include/trace/events/sched.h                       |   2 +-
>  init/Kconfig                                       |  12 +-
>  init/init_task.c                                   |   1 +
>  kernel/sched/core.c                                |  14 +-
>  kernel/sched/cputime.c                             |  13 -
>  kernel/sched/fair.c                                | 501 ++++++++++++---------
>  kernel/sched/loadavg.c                             |   2 +-
>  kernel/sched/pelt.c                                |  22 +-
>  kernel/sched/pelt.h                                |  16 +-
>  kernel/sched/sched.h                               |  71 ++-
>  kernel/sched/stats.c                               |   5 +-
>  kernel/sched/topology.c                            |  56 ++-
>  kernel/time/timer.c                                |   2 +-
>  kernel/workqueue.c                                 |   2 +-
>  lib/Kconfig.debug                                  |   2 +-
>  .../ftrace/test.d/ftrace/func_set_ftrace_file.tc   |   2 +-
>  42 files changed, 549 insertions(+), 440 deletions(-)
>  delete mode 100644 include/asm-generic/vtime.h
>  rename include/trace/events/{thermal_pressure.h => hw_pressure.h} (55%)