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Re: [GIT PULL] Power management updates for v4.14-rc1

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Pace of Linux development is too rapid in my view.



On 04/09/17 22:37, Rafael J. Wysocki wrote:
> Hi Linus,
> 
> Please pull from the tag
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \
>   pm-4.14-rc1
> 
> with top-most commit d97561f461e4cb5b2e170bc33b466cffbddc8719
> 
>   Merge branch 'pm-tools'
> 
> on top of commit 569dbb88e80deb68974ef6fdd6a13edb9d686261
> 
>   Linux 4.13
> 
> to receive power management updates for v4.14-rc1.
> 
> This time (again) cpufreq gets the majority of changes which mostly
> are driver updates (including a major consolidation of intel_pstate),
> some schedutil governor modifications and core cleanups.
> 
> There also are some changes in the system suspend area, mostly
> related to diagnostics and debug messages plus some renames of
> things related to suspend-to-idle.  One major change here is
> that suspend-to-idle is now going to be preferred over S3 on
> systems where the ACPI tables indicate to do so and provide
> requsite support (the Low Power Idle S0 _DSM in particular).
> The system sleep documentation and the tools related to it are
> updated too.
> 
> The rest is a few cpuidle changes (nothing major), devfreq updates,
> generic power domains (genpd) framework updates and a few assorted
> modifications elsewhere.
> 
> Specifics:
> 
>   - Drop the P-state selection algorithm based on a PID controller
>     from intel_pstate and make it use the same P-state selection
>     method (based on the CPU load) for all types of systems in the
>     active mode (Rafael Wysocki, Srinivas Pandruvada).
> 
>   - Rework the cpufreq core and governors to make it possible to
>     take cross-CPU utilization updates into account and modify the
>     schedutil governor to actually do so (Viresh Kumar).
> 
>   - Clean up the handling of transition latency information in the
>     cpufreq core and untangle it from the information on which drivers
>     cannot do dynamic frequency switching (Viresh Kumar).
> 
>   - Add support for new SoCs (MT2701/MT7623 and MT7622) to the
>     mediatek cpufreq driver and update its DT bindings (Sean Wang).
> 
>   - Modify the cpufreq dt-platdev driver to autimatically create
>     cpufreq devices for the new (v2) Operating Performance Points
>     (OPP) DT bindings and update its whitelist of supported systems
>     (Viresh Kumar, Shubhrajyoti Datta, Marc Gonzalez, Khiem Nguyen,
>     Finley Xiao).
> 
>   - Add support for Ux500 to the cpufreq-dt driver and drop the
>     obsolete dbx500 cpufreq driver (Linus Walleij, Arnd Bergmann).
> 
>   - Add new SoC (R8A7795) support to the cpufreq rcar driver (Khiem
>     Nguyen).
> 
>   - Fix and clean up assorted issues in the cpufreq drivers and core
>     (Arvind Yadav, Christophe Jaillet, Colin Ian King, Gustavo Silva,
>     Julia Lawall, Leonard Crestez, Rob Herring, Sudeep Holla).
> 
>   - Update the IO-wait boost handling in the schedutil governor to
>     make it less aggressive (Joel Fernandes).
> 
>   - Rework system suspend diagnostics to make it print fewer messages
>     to the kernel log by default, add a sysfs knob to allow more
>     suspend-related messages to be printed and add Low Power S0 Idle
>     constraints checks to the ACPI suspend-to-idle code (Rafael
>     Wysocki, Srinivas Pandruvada).
> 
>   - Prefer suspend-to-idle over S3 on ACPI-based systems with the
>     ACPI_FADT_LOW_POWER_S0 flag set and the Low Power Idle S0 _DSM
>     interface present in the ACPI tables (Rafael Wysocki).
> 
>   - Update documentation related to system sleep and rename a number
>     of items in the code to make it cleare that they are related to
>     suspend-to-idle (Rafael Wysocki).
> 
>   - Export a variable allowing device drivers to check the target
>     system sleep state from the core system suspend code (Florian
>     Fainelli).
> 
>   - Clean up the cpuidle subsystem to handle the polling state on
>     x86 in a more straightforward way and to use %pOF instead of
>     full_name (Rafael Wysocki, Rob Herring).
> 
>   - Update the devfreq framework to fix and clean up a few minor
>     issues (Chanwoo Choi, Rob Herring).
> 
>   - Extend diagnostics in the generic power domains (genpd) framework
>     and clean it up slightly (Thara Gopinath, Rob Herring).
> 
>   - Fix and clean up a couple of issues in the operating performance
>     points (OPP) framework (Viresh Kumar, Waldemar Rymarkiewicz).
> 
>   - Add support for RV1108 to the rockchip-io Adaptive Voltage Scaling
>     (AVS) driver (David Wu).
> 
>   - Fix the usage of notifiers in CPU power management on some
>     platforms (Alex Shi).
> 
>   - Update the pm-graph system suspend/hibernation and boot profiling
>     utility (Todd Brandt).
> 
>   - Make it possible to run the cpupower utility without CPU0 (Prarit
>     Bhargava).
> 
> There was a merge conflict of the cpufreq material with the tip tree
> in linux-next and the Stephen's resolution of it is appended.
> 
> Thanks!
> 
> 
> ---------------
> 
> Alex Shi (1):
>        PM / CPU: replace raw_notifier with atomic_notifier
> 
> Arnd Bergmann (1):
>        ARM: ux500: don't select CPUFREQ_DT
> 
> Arvind Yadav (1):
>        cpufreq: Loongson2: constify platform_device_id
> 
> Chanwoo Choi (3):
>        PM / devfreq: Move private devfreq_update_stats() into devfreq
>        PM / devfreq: Add dependency on PM_OPP
>        PM / devfreq: Fix memory leak when fail to register device
> 
> Christophe Jaillet (1):
>        cpufreq: ti: Fix 'of_node_put' being called twice in error handling path
> 
> Colin Ian King (1):
>        cpufreq: speedstep-lib: make several arrays static, makes code smaller
> 
> David Wu (1):
>        PM / AVS: rockchip-io: add io selectors and supplies for RV1108
> 
> Finley Xiao (1):
>        cpufreq: dt: Add rk3328 compatible to use generic cpufreq driver
> 
> Florian Fainelli (1):
>        PM / suspend: Export pm_suspend_target_state
> 
> Gustavo A. R. Silva (1):
>        cpufreq: speedstep: remove unnecessary static in
> speedstep_detect_chipset()
> 
> Joel Fernandes (2):
>        cpufreq: schedutil: Make iowait boost more energy efficient
>        cpufreq: schedutil: Use unsigned int for iowait boost
> 
> Julia Lawall (1):
>        cpufreq: s5pv210: add missing of_node_put()
> 
> Khiem Nguyen (2):
>        cpufreq: rcar: Add support for R8A7795 SoC
>        cpufreq: dt: Add r8a7796 support to to use generic cpufreq driver
> 
> Leonard Crestez (1):
>        cpufreq: imx6q: Fix imx6sx low frequency support
> 
> Linus Walleij (3):
>        cpufreq: enable the DT cpufreq driver on the Ux500
>        mfd: db8500-prcmu: Get rid of cpufreq dependency
>        cpufreq: dbx500: Delete obsolete driver
> 
> Marc Gonzalez (1):
>        cpufreq: dt: Don't use generic platdev driver for tango
> 
> Prarit Bhargava (1):
>        tools/power/cpupower: allow running without cpu0
> 
> Rafael J. Wysocki (28):
>        PM / sleep: Do not print debug messages by default
>        PM / sleep: Mark suspend/hibernation start and finish
>        PM / timekeeping: Print debug messages when requested
>        PM / s2idle: Rearrange the main suspend-to-idle loop
>        PM / core: Split dpm_suspend_noirq() and dpm_resume_noirq()
>        PM / core: Add error argument to dpm_show_time()
>        PM / sleep: Check pm_wakeup_pending() in __device_suspend_noirq()
>        PM / sleep: Put pm_test under CONFIG_PM_SLEEP_DEBUG
>        PM / suspend: Use mem_sleep_labels[] strings in messages
>        PM / suspend: Define pr_fmt() in suspend.c
>        cpufreq: intel_pstate: Do not use PID-based P-state selection
>        cpufreq: intel_pstate: Drop ->update_util from pstate_funcs
>        cpufreq: intel_pstate: Drop INTEL_PSTATE_HWP_SAMPLING_INTERVAL
>        platform/x86: intel-hid: Wake up Dell Latitude 7275 from suspend-to-idle
>        ACPI / PM: Prefer suspend-to-idle over S3 on some systems
>        cpufreq: Simplify cpufreq_can_do_remote_dvfs()
>        PM / wakeup: Set power.can_wakeup if wakeup_sysfs_add() fails
>        cpufreq: intel_pstate: Simplify intel_pstate_adjust_pstate()
>        cpufreq: intel_pstate: Shorten a couple of long names
>        PM / s2idle: Rename PM_SUSPEND_FREEZE to PM_SUSPEND_TO_IDLE
>        PM / s2idle: Rename freeze_state enum and related items
>        PM / s2idle: Rename ->enter_freeze to ->enter_s2idle
>        PM / s2idle: Rename platform operations structure
>        PM: docs: Describe high-level PM strategies and sleep states
>        PM: docs: Delete the obsolete states.txt document
>        cpuidle: Eliminate the CPUIDLE_DRIVER_STATE_START symbol
>        cpuidle: Move polling state initialization code to separate file
>        cpuidle: Make drivers initialize polling state
> 
> Rob Herring (4):
>        PM / Domains: Convert to using %pOF instead of full_name
>        cpufreq: Convert to using %pOF instead of full_name
>        cpuidle: Convert to using %pOF instead of full_name
>        PM / devfreq: Convert to using %pOF instead of full_name
> 
> Sean Wang (5):
>        cpufreq: mediatek: Add support of cpufreq to MT2701/MT7623 SoC
>        dt-bindings: cpufreq: move MediaTek cpufreq dt-bindings document
> to proper place
>        dt-bindings: cpufreq: enhance MediaTek cpufreq dt-binding document
>        cpufreq: mediatek: add cleanups with the more generic naming
>        cpufreq: mediatek: add support of cpufreq to MT7622 SoC
> 
> Shubhrajyoti Datta (1):
>        cpufreq: dt: Add zynqmp to the cpufreq dt platdev
> 
> Srinivas Pandruvada (2):
>        cpufreq: intel_pstate: Improve IO performance with per-core P-states
>        ACPI / PM: Check low power idle constraints for debug only
> 
> Sudeep Holla (1):
>        cpufreq: remove setting of policy->cpu in policy->cpus during init
> 
> Thara Gopinath (2):
>        PM / Domains: Add time accounting to various genpd states
>        PM / Domains: Extend generic power domain debugfs
> 
> Todd E Brandt (3):
>        pm-graph: AnalyzeSuspend v4.7
>        pm-graph: AnalyzeBoot v2.1
>        pm-graph: package makefile and man pages
> 
> Viresh Kumar (17):
>        PM / OPP: OF: Use pr_debug() instead of pr_err() while adding OPP table
>        cpufreq: governor: Drop min_sampling_rate
>        cpufreq: Use transition_delay_us for legacy governors as well
>        cpufreq: Don't set transition_latency for setpolicy drivers
>        cpufreq: arm_big_little: Make ->get_transition_latency() mandatory
>        cpufreq: Replace "max_transition_latency" with "dynamic_switching"
>        cpufreq: schedutil: Set dynamic_switching to true
>        cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag
>        cpufreq: Allow dynamic switching with CPUFREQ_ETERNAL latency
>        sched: cpufreq: Allow remote cpufreq callbacks
>        cpufreq: Process remote callbacks from any CPU if the platform permits
>        cpufreq: Return 0 from ->fast_switch() on errors
>        cpufreq: schedutil: Don't restrict kthread to related_cpus unnecessarily
>        cpufreq: schedutil: Always process remote callback with slow switching
>        cpufreq: Cap the default transition delay value to 10 ms
>        cpufreq: dt-platdev: Automatically create cpufreq device with OPP v2
>        cpufreq: dt-platdev: Drop few entries from whitelist
> 
> Waldemar Rymarkiewicz (1):
>        PM / OPP: Fix get sharing CPUs when hotplug is used
> 
> ---------------
> 
>   Documentation/ABI/testing/sysfs-power              |  12 +
>   Documentation/admin-guide/pm/cpufreq.rst           |   8 -
>   Documentation/admin-guide/pm/index.rst             |  12 +-
>   Documentation/admin-guide/pm/intel_pstate.rst      |  61 +--
>   Documentation/admin-guide/pm/sleep-states.rst      | 245 +++++++++
>   Documentation/admin-guide/pm/strategies.rst        |  52 ++
>   Documentation/admin-guide/pm/system-wide.rst       |   8 +
>   Documentation/admin-guide/pm/working-state.rst     |   9 +
>   .../devicetree/bindings/clock/mt8173-cpu-dvfs.txt  |  83 ---
>   .../bindings/cpufreq/cpufreq-mediatek.txt          | 247 +++++++++
>   .../bindings/power/rockchip-io-domain.txt          |   2 +
>   Documentation/power/states.txt                     | 125 -----
>   arch/arm/boot/dts/tango4-smp8758.dtsi              |   1 -
>   arch/arm/mach-tegra/cpuidle-tegra114.c             |   4 +-
>   drivers/acpi/processor_idle.c                      |  23 +-
>   drivers/acpi/sleep.c                               | 202 ++++++-
>   drivers/base/power/domain.c                        | 251 ++++++++-
>   drivers/base/power/main.c                          | 103 ++--
>   drivers/base/power/opp/of.c                        |  37 +-
>   drivers/base/power/wakeup.c                        |  10 +-
>   drivers/cpufreq/Kconfig.arm                        |  21 +-
>   drivers/cpufreq/Makefile                           |   4 +-
>   drivers/cpufreq/arm_big_little.c                   |  10 +-
>   drivers/cpufreq/cppc_cpufreq.c                     |   1 -
>   drivers/cpufreq/cpufreq-dt-platdev.c               |  65 ++-
>   drivers/cpufreq/cpufreq-dt.c                       |   1 +
>   drivers/cpufreq/cpufreq-nforce2.c                  |   2 +-
>   drivers/cpufreq/cpufreq.c                          |  41 +-
>   drivers/cpufreq/cpufreq_conservative.c             |   6 -
>   drivers/cpufreq/cpufreq_governor.c                 |  20 +-
>   drivers/cpufreq/cpufreq_governor.h                 |   3 +-
>   drivers/cpufreq/cpufreq_ondemand.c                 |  12 -
>   drivers/cpufreq/dbx500-cpufreq.c                   | 103 ----
>   drivers/cpufreq/elanfreq.c                         |   4 +-
>   drivers/cpufreq/gx-suspmod.c                       |   2 +-
>   drivers/cpufreq/imx6q-cpufreq.c                    |   9 +
>   drivers/cpufreq/intel_pstate.c                     | 322 +----------
>   drivers/cpufreq/longrun.c                          |   1 -
>   drivers/cpufreq/loongson2_cpufreq.c                |   2 +-
>   .../{mt8173-cpufreq.c => mediatek-cpufreq.c}       |  29 +-
>   drivers/cpufreq/pmac32-cpufreq.c                   |   7 +-
>   drivers/cpufreq/pmac64-cpufreq.c                   |   2 +-
>   drivers/cpufreq/s5pv210-cpufreq.c                  |   3 +
>   drivers/cpufreq/sa1100-cpufreq.c                   |   5 +-
>   drivers/cpufreq/sa1110-cpufreq.c                   |   5 +-
>   drivers/cpufreq/sh-cpufreq.c                       |   3 +-
>   drivers/cpufreq/speedstep-ich.c                    |   2 +-
>   drivers/cpufreq/speedstep-lib.c                    |   4 +-
>   drivers/cpufreq/speedstep-smi.c                    |   2 +-
>   drivers/cpufreq/sti-cpufreq.c                      |   8 +-
>   drivers/cpufreq/tango-cpufreq.c                    |  38 ++
>   drivers/cpufreq/ti-cpufreq.c                       |   4 +-
>   drivers/cpufreq/unicore2-cpufreq.c                 |   3 +-
>   drivers/cpuidle/Makefile                           |   1 +
>   drivers/cpuidle/cpuidle.c                          |  18 +-
>   drivers/cpuidle/driver.c                           |  32 --
>   drivers/cpuidle/dt_idle_states.c                   |  24 +-
>   drivers/cpuidle/governors/ladder.c                 |  14 +-
>   drivers/cpuidle/governors/menu.c                   |  13 +-
>   drivers/cpuidle/poll_state.c                       |  37 ++
>   drivers/devfreq/Kconfig                            |   1 +
>   drivers/devfreq/devfreq-event.c                    |   4 +-
>   drivers/devfreq/devfreq.c                          |   5 +-
>   drivers/devfreq/governor.h                         |   4 +
>   drivers/idle/intel_idle.c                          | 181 +++----
>   drivers/mfd/db8500-prcmu.c                         |  62 +--
>   drivers/platform/x86/intel-hid.c                   |  17 +-
>   drivers/power/avs/rockchip-io-domain.c             |  38 ++
>   drivers/regulator/of_regulator.c                   |   2 +-
>   include/linux/cpufreq.h                            |  38 +-
>   include/linux/cpuidle.h                            |  21 +-
>   include/linux/devfreq.h                            |  13 -
>   include/linux/pm.h                                 |   4 +
>   include/linux/pm_domain.h                          |   3 +
>   include/linux/suspend.h                            |  48 +-
>   kernel/cpu_pm.c                                    |  50 +-
>   kernel/power/hibernate.c                           |  29 +-
>   kernel/power/main.c                                |  64 ++-
>   kernel/power/power.h                               |   5 +-
>   kernel/power/suspend.c                             | 184 ++++---
>   kernel/power/suspend_test.c                        |   4 +-
>   kernel/sched/cpufreq_schedutil.c                   |  98 +++-
>   kernel/sched/deadline.c                            |   2 +-
>   kernel/sched/fair.c                                |   8 +-
>   kernel/sched/idle.c                                |   8 +-
>   kernel/sched/rt.c                                  |   2 +-
>   kernel/sched/sched.h                               |  10 +-
>   kernel/time/timekeeping_debug.c                    |   5 +-
>   tools/power/cpupower/utils/cpupower.c              |  15 +-
>   tools/power/cpupower/utils/helpers/cpuid.c         |   4 +-
>   tools/power/cpupower/utils/helpers/helpers.h       |   5 +-
>   tools/power/cpupower/utils/helpers/misc.c          |   2 +-
>   .../cpupower/utils/idle_monitor/hsw_ext_idle.c     |   4 +-
>   .../cpupower/utils/idle_monitor/mperf_monitor.c    |   3 +-
>   tools/power/cpupower/utils/idle_monitor/nhm_idle.c |   8 +-
>   tools/power/cpupower/utils/idle_monitor/snb_idle.c |   4 +-
>   tools/power/pm-graph/Makefile                      |  19 +-
>   tools/power/pm-graph/analyze_boot.py               | 586 ++++++++++++++-------
>   tools/power/pm-graph/analyze_suspend.py            | 534 +++++++++++++------
>   tools/power/pm-graph/bootgraph.8                   |  61 ++-
>   tools/power/pm-graph/sleepgraph.8                  |  48 +-
>   101 files changed, 2835 insertions(+), 1746 deletions(-)
> 
> 
> diff --cc kernel/sched/fair.c
> index d378d02fdfcb,8d5868771cb3..000000000000
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@@ -2790,6 -2801,29 +2801,31 @@@ static inline void update_cfs_shares(st
>    }
>    #endif /* CONFIG_FAIR_GROUP_SCHED */
> 
> + static inline void cfs_rq_util_change(struct cfs_rq *cfs_rq)
> + {
>   -    if (&this_rq()->cfs == cfs_rq) {
> ++    struct rq *rq = rq_of(cfs_rq);
> ++
> ++    if (&rq->cfs == cfs_rq) {
> +         /*
> +          * There are a few boundary cases this might miss but it should
> +          * get called often enough that that should (hopefully) not be
> +          * a real problem -- added to that it only calls on the local
> +          * CPU, so if we enqueue remotely we'll miss an update, but
> +          * the next tick/schedule should update.
> +          *
> +          * It will not get called when we go idle, because the idle
> +          * thread is a different class (!fair), nor will the utilization
> +          * number include things like RT tasks.
> +          *
> +          * As is, the util number is not freq-invariant (we'd have to
> +          * implement arch_scale_freq_capacity() for that).
> +          *
> +          * See cpu_util().
> +          */
>   -        cpufreq_update_util(rq_of(cfs_rq), 0);
> ++        cpufreq_update_util(rq, 0);
> +     }
> + }
> +
>    #ifdef CONFIG_SMP
>    /*
>     * Approximate:
> 

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[GIT PULL] Power management updates for v4.14-rc1 "Rafael J. Wysocki" <rafael@kernel.org> - 2017-09-04 23:40 +0200
  Re: [GIT PULL] Power management updates for v4.14-rc1 doa379 <doa379@gmail.com> - 2017-09-04 23:50 +0200

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