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Date: Mon, 4 Sep 2017 22:46:05 +0100
From: doa379 <doa379@...il.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Linux PM <linux-pm@...r.kernel.org>,
ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [GIT PULL] Power management updates for v4.14-rc1
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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