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x86-core-2020-08-03

ef2ff0f5 · x86/dumpstack: Show registers dump with trace's log level · Jul 22, 2020

Improve x86 debuggability: print registers with the same log level as the backtrace.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

x86-cleanups-2020-08-03

90fc7392 · x86/ioperm: Initialize pointer bitmap with NULL rather than 0 · Jul 26, 2020
```
Misc cleanups all around the place.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
```
Unverified

x86-build-2020-08-03

1d0e12fd · x86/defconfigs: Refresh defconfig files · Jul 25, 2020

Misc changes: refresh defconfigs and simplify the boot image link stage.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

acpi-5.9-rc1

db1da2f5 · Merge branches 'acpi-mm', 'acpi-tables', 'acpi-apei' and 'acpi-misc' · Aug 03, 2020

ACPI updates for 5.9-rc1

 - Eliminate significant AML processing overhead related to using
   operation regions in system memory by reworking the management
   of memory mappings in the ACPI code to defer unmap operations
   (to do them outside of the ACPICA locks, among other things) and
   making the memory operation reagion handler avoid releasing memory
   mappings created by it too early (Rafael Wysocki).

 - Update the ACPICA code in the kernel to upstream revision
   20200717:

   * Prevent operation region reference counts from overflowing in
     some cases (Erik Kaneda).

   * Replace one-element array with flexible-array (Gustavo A. R.
     Silva).

 - Fix ACPI PCI hotplug reference counting (Rafael Wysocki).

 - Drop last bits of the ACPI procfs interface (Thomas Renninger).

 - Drop some redundant checks from the code parsing ACPI tables
   related to NUMA (Hanjun Guo).

 - Avoid redundant object evaluation in the ACPI device properties
   handling code (Heikki Krogerus).

 - Avoid unecessary memory overhead related to storing the signatures
   of the ACPI tables recognized by the kernel (Ard Biesheuvel).

 - Add missing newline characters when printing module parameter
   values in some places (Xiongfeng Wang).

 - Update the link to the ACPI specifications in some places (Tiezhu
   Yang).

 - Use the fallthrough pseudo-keyword in the ACPI code (Gustavo A. R.
   Silva).

 - Drop redundant variable initialization from the APEI code (Colin
   Ian King).

 - Drop uninitialized_var() from the ACPI PAD driver (Jason Yan).

 - Replace HTTP links with HTTPS ones in the ACPI code (Alexander A.
   Klimov).

Unverified

pm-5.9-rc1

86ba54fb · Merge branches 'pm-sleep', 'pm-domains', 'powercap' and 'pm-tools' · Aug 03, 2020

Power management updates for 5.9-rc1

 - Make the Energy Model cover non-CPU devices (Lukasz Luba).

 - Add Ice Lake server idle states table to the intel_idle driver
   and eliminate a redundant static variable from it (Chen Yu,
   Rafael Wysocki).

 - Eliminate all W=1 build warnings from cpufreq (Lee Jones).

 - Add support for Sapphire Rapids and for Power Limit 4 to the
   Intel RAPL power capping driver (Sumeet Pawnikar, Zhang Rui).

 - Fix function name in kerneldoc comments in the idle_inject power
   capping driver (Yangtao Li).

 - Fix locking issues with cpufreq governors and drop a redundant
   "weak" function definition from cpufreq (Viresh Kumar).

 - Rearrange cpufreq to register non-modular governors at the
   core_initcall level and allow the default cpufreq governor to
   be specified in the kernel command line (Quentin Perret).

 - Extend, fix and clean up the intel_pstate driver (Srinivas
   Pandruvada, Rafael Wysocki):

   * Add a new sysfs attribute for disabling/enabling CPU
     energy-efficiency optimizations in the processor.

   * Make the driver avoid enabling HWP if EPP is not supported.

   * Allow the driver to handle numeric EPP values in the sysfs
     interface and fix the setting of EPP via sysfs in the active
     mode.

   * Eliminate a static checker warning and clean up a kerneldoc
     comment.

 - Clean up some variable declarations in the powernv cpufreq
   driver (Wei Yongjun).

 - Fix up the ->enter_s2idle callback definition to cover the case
   when it points to the same function as ->idle correctly (Neal
   Liu).

 - Rearrange and clean up the PSCI cpuidle driver (Ulf Hansson).

 - Make the PM core emit "changed" uevent when adding/removing the
   "wakeup" sysfs attribute of devices (Abhishek Pandit-Subedi).

 - Add a helper macro for declaring PM callbacks and use it in the
   MMC jz4740 driver (Paul Cercueil).

 - Fix white space in some places in the hibernate code and make the
   system-wide PM code use "const char *" where appropriate (Xiang
   Chen, Alexey Dobriyan).

 - Add one more "unsafe" helper macro to the freezer to cover the NFS
   use case (He Zhe).

 - Change the language in the generic PM domains framework to use
   parent/child terminology and clean up a typo and some comment
   fromatting in that code (Kees Cook, Geert Uytterhoeven).

 - Update the operating performance points OPP framework (Lukasz
   Luba, Andrew-sh.Cheng, Valdis Kletnieks):

   * Refactor dev_pm_opp_of_register_em() and update related drivers.

   * Add a missing function export.

   * Allow disabled OPPs in dev_pm_opp_get_freq().

 - Update devfreq core and drivers (Chanwoo Choi, Lukasz Luba, Enric
   Balletbo i Serra, Dmitry Osipenko, Kieran Bingham, Marc Zyngier):

   * Add support for delayed timers to the devfreq core and make the
     Samsung exynos5422-dmc driver use it.

   * Unify sysfs interface to use "df-" as a prefix in instance names
     consistently.

   * Fix devfreq_summary debugfs node indentation.

   * Add the rockchip,pmu phandle to the rk3399_dmc driver DT
     bindings.

   * List Dmitry Osipenko as the Tegra devfreq driver maintainer.

   * Fix typos in the core devfreq code.

 - Update the pm-graph utility to version 5.7 including a number of
   fixes related to suspend-to-idle (Todd Brandt).

 - Fix coccicheck errors and warnings in the cpupower utility (Shuah
   Khan).

 - Replace HTTP links with HTTPs ones in multiple places (Alexander
   A. Klimov).

Unverified

x86-boot-2020-08-03

1ac1efa5 · Documentation: dontdiff: Add zstd compressed files · Jul 31, 2020

The main change in this cycle was to add support for ZSTD-compressed
kernel and initrd images.

ZSTD has a very fast decompressor, yet it compresses better than gzip.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

x86-asm-2020-08-03

158807de · x86/uaccess: Make __get_user_size() Clang compliant on 32-bit · Jul 23, 2020

A couple of changes, concentrated into the percpu code, to enable
Clang support on i386 kernels too.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

android-mainline-5.8

5a0b0ef4 · Merge 5.8 into android-mainline · Aug 03, 2020
```
android-mainline @ v5.8
```

x86-alternatives-2020-08-03

1b2e335e · x86/alternatives: Add pr_fmt() to debug macros · Jun 16, 2020

A single commit that improves the alternatives patching syslog debug output.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

sched-core-2020-08-03

949bcb81 · sched/doc: Factorize bits between sched-energy.rst & sched-capacity.rst · Aug 01, 2020

The main changes in this cycle were:

 - Improve uclamp performance by using a static key for the fast path

 - Add the "sched_util_clamp_min_rt_default" sysctl, to optimize for
   better power efficiency of RT tasks on battery powered devices.
   (The default is to maximize performance & reduce RT latencies.)

 - Improve utime and stime tracking accuracy, which had a fixed boundary
   of error, which created larger and larger relative errors as the values
   become larger. This is now replaced with more precise arithmetics,
   using the new mul_u64_u64_div_u64() helper in math64.h.

 - Improve the deadline scheduler, such as making it capacity aware

 - Improve frequency-invariant scheduling

 - Misc cleanups in energy/power aware scheduling

 - Add sched_update_nr_running tracepoint to track changes to nr_running

 - Documentation additions and updates

 - Misc cleanups and smaller fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

perf-core-2020-08-03

d903b6d0 · perf/x86/rapl: Add Hygon Fam18h RAPL support · Jul 28, 2020

- HW support updates:

   - Add uncore support for Intel Comet Lake

   - Add RAPL support for Hygon Fam18h

   - Add Intel "IIO stack to PMON mapping" support on Skylake-SP CPUs,
     which enumerates per device performance counters via sysfs and enables
     the perf stat --iiostat functionality

   - Add support for Intel "Architectural LBRs", which generalized the model
     specific LBR hardware tracing feature into a model-independent, architected
     performance monitoring feature. Usage is mostly seamless to tooling, as the
     pre-existing LBR features are kept, but there's a couple of advantages
     under the hood, such as faster context-switching, faster LBR reads,
     cleaner exposure of LBR features to guest kernels, etc.

     ( Since architectural LBRs are supported via XSAVE, there's related
       changes to the x86 FPU code as well. )

 - ftrace/perf updates: Add support to add a text poke event to record changes
                        to kernel text (i.e. self-modifying code) in order to
                        support tracers like Intel PT decoding through
                        jump labels, kprobes and ftrace trampolines.

 - Misc cleanups, smaller fixes.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

objtool-core-2020-08-03

d832c005 · Merge branch 'objtool/urgent' into objtool/core · Jun 18, 2020

Misc updates:

- Add support for non-rela relocations, in preparation to merge 'recordmcount'
  functionality into objtool.

- Fix assumption that broke under --ffunction-sections (LTO) builds.

- Misc cleanups.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

locking-core-2020-08-03

992414a1 · Merge branch 'locking/nmi' into locking/core, to pick up completed topic branch · Aug 03, 2020

These were the main changes in this cycle:

 - LKMM updates: mostly documentation changes, but also some new litmus tests for atomic ops.

 - KCSAN updates: the most important change is that GCC 11 now has all fixes in place
                  to support KCSAN, so GCC support can be enabled again. Also more annotations.

 - futex updates: minor cleanups and simplifications

 - seqlock updates: merge preparatory changes/cleanups for the 'associated locks' facilities.

 - lockdep updates:
    - simplify IRQ trace event handling
    - add various new debug checks
    - simplify header dependencies, split out <linux/lockdep_types.h>, decouple
      lockdep from other low level headers some more
    - fix NMI handling

 - misc cleanups and smaller fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

core-rcu-2020-08-03

c1cc4784 · Merge branch 'for-mingo' of... · Jul 31, 2020

These are the latest RCU bits for v5.9:

  - kfree_rcu updates
  - RCU tasks updates
  - Read-side scalability tests
  - SRCU updates
  - Torture-test updates
  - Documentation updates
  - Miscellaneous fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

core-headers-2020-08-03

d19e789f · compiler.h: Move instrumentation_begin()/end() to new <linux/instrumentation.h> header · Jul 24, 2020
```
A single commit that separates out the instrumentation_begin()/end() bits from compiler.h.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
```
Unverified

core-debugobjects-2020-08-03

0f85c480 · debugobjects: Convert to DEFINE_SHOW_ATTRIBUTE · Jul 17, 2020

A single commit which simplifies a debugfs attribute definition.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

v5.8

bcf87687 · Linux 5.8 · Aug 02, 2020
```
Linux 5.8
```
Unverified

irq-urgent-2020-08-02

aa251fc5 · genirq/debugfs: Add missing irqchip flags · Jul 27, 2020

Fix a recent IRQ affinities regression, add in a missing debugfs printout
that helps the debugging of IRQ affinity logic bugs, and fix a memory leak.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

x86-urgent-2020-08-02

bdd65589 · x86/i8259: Use printk_deferred() to prevent deadlock · Jul 29, 2020

A single fix for a potential deadlock when printing a message about spurious interrupts.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Unverified

for-5.9/io_uring-20200802

fa15bafb · io_uring: flip if handling after io_setup_async_rw · Aug 01, 2020
```
for-5.9/io_uring-20200802
```
Unverified