Tags

v4.9.316

This is the 4.9.316 stable release

folio-5.19

Page cache changes for 5.19

 - Appoint myself page cache maintainer

 - Fix how scsicam uses the page cache

 - Use the memalloc_nofs_save() API to replace AOP_FLAG_NOFS

 - Remove the AOP flags entirely

 - Remove pagecache_write_begin() and pagecache_write_end()

 - Documentation updates

 - Convert several address_space operations to use folios:
   - is_dirty_writeback
   - readpage becomes read_folio
   - releasepage becomes release_folio
   - freepage becomes free_folio

 - Change filler_t to require a struct file pointer be the first argument
   like ->read_folio

x86_vdso_for_v5.19_rc1

- Get rid of CONFIG_LEGACY_VSYSCALL_EMULATE as nothing should be using it anymore

x86_microcode_for_v5.19_rc1

- Make CPU vendor dependency explicit against random config build failures

x86_misc_for_v5.19_rc1

- A gargen variety of fixes which don't fit any other tip bucket:
 - Remove function export
 - Correct asm constraint
 - Fix __setup handlers retval

x86_splitlock_for_v5.19_rc1

- Add Raptor Lake to the set of CPU models which support splitlock

- Make life miserable for apps using split locks by slowing them down
considerably while the rest of the system remains responsive. The hope
is it will hurt more and people will really fix their misaligned locks
apps. As a result, free a TIF bit.

x86_apic_for_v5.19_rc1

- Always do default APIC routing setup so that cpumasks are properly
allocated and are present when later accessed ("nosmp" and x2APIC)

- Clarify the bit overlap between an old APIC and a modern, integrated one

x86_kdump_for_v5.19_rc1

- A single debug message fix

x86_platform_for_v5.19_rc1

- A couple of changes enabling SGI UV5 support

5.4.195-404

x86_mm_for_v5.19_rc1

- A sparse address space annotation fix

sched-core-2022-05-23

Scheduler changes in this cycle were:

 - Updates to scheduler metrics:

    - PELT fixes & enhancements
    - PSI fixes & enhancements
    - Refactor cpu_util_without()

 - Updates to instrumentation/debugging:

    - Remove sched_trace_*() helper functions - can be done via debug info
    - Fix double update_rq_clock() warnings

 - Introduce & use "preemption model accessors" to simplify some of
   the Kconfig complexity.

 - Make softirq handling RT-safe.

 - Misc smaller fixes & cleanups.

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

perf-core-2022-05-23

Perf events changes for this cycle were:

Platform PMU changes:
=====================

 - x86/intel:
    - Add new Intel Alder Lake and Raptor Lake support

 - x86/amd:
    - AMD Zen4 IBS extensions support
    - Add AMD PerfMonV2 support
    - Add AMD Fam19h Branch Sampling support

Generic changes:
================

 - signal: Deliver SIGTRAP on perf event asynchronously if blocked

   Perf instrumentation can be driven via SIGTRAP, but this causes a problem
   when SIGTRAP is blocked by a task & terminate the task.

   Allow user-space to request these signals asynchronously (after they get
   unblocked) & also give the information to the signal handler when this
   happens:

     " To give user space the ability to clearly distinguish synchronous from
       asynchronous signals, introduce siginfo_t::si_perf_flags and
       TRAP_PERF_FLAG_ASYNC (opted for flags in case more binary information is
       required in future).

       The resolution to the problem is then to (a) no longer force the signal
       (avoiding the terminations), but (b) tell user space via si_perf_flags
       if the signal was synchronous or not, so that such signals can be
       handled differently (e.g. let user space decide to ignore or consider
       the data imprecise). "

 - Unify/standardize the /sys/devices/cpu/events/* output format.

 - Misc fixes & cleanups.

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

objtool-core-2022-05-23

Objtool changes for this cycle were:

 - Comprehensive interface overhaul:
   =================================

   Objtool's interface has some issues:

     - Several features are done unconditionally, without any way to turn
       them off.  Some of them might be surprising.  This makes objtool
       tricky to use, and prevents porting individual features to other
       arches.

     - The config dependencies are too coarse-grained.  Objtool enablement is
       tied to CONFIG_STACK_VALIDATION, but it has several other features
       independent of that.

     - The objtool subcmds ("check" and "orc") are clumsy: "check" is really
       a subset of "orc", so it has all the same options.  The subcmd model
       has never really worked for objtool, as it only has a single purpose:
       "do some combination of things on an object file".

     - The '--lto' and '--vmlinux' options are nonsensical and have
       surprising behavior.

   Overhaul the interface:

      - get rid of subcmds

      - make all features individually selectable

      - remove and/or clarify confusing/obsolete options

      - update the documentation

      - fix some bugs found along the way

 - Fix x32 regression

 - Fix Kbuild cleanup bugs

 - Add scripts/objdump-func helper script to disassemble a single function from an object file.

 - Rewrite scripts/faddr2line to be section-aware, by basing it on 'readelf',
   moving it away from 'nm', which doesn't handle multiple sections well,
   which can result in decoding failure.

 - Rewrite & fix symbol handling - which had a number of bugs wrt. object files
   that don't have global symbols - which is rare but possible. Also fix a
   bunch of symbol handling bugs found along the way.

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

x86_fpu_for_v5.19_rc1

- Add support for XSAVEC - the Compacted XSTATE saving variant - and
thus allow for guests to use this compacted XSTATE variant when the
hypervisor exports that support

- A variable shadowing cleanup

locking-core-2022-05-23

Locking changes in this cycle were:

 - rwsem cleanups & optimizations/fixes:
    - Conditionally wake waiters in reader/writer slowpaths
    - Always try to wake waiters in out_nolock path

 - Add try_cmpxchg64() implementation, with arch optimizations - and use it to
   micro-optimize sched_clock_{local,remote}()

 - Various force-inlining fixes to address objdump instrumentation-check warnings

 - Add lock contention tracepoints:

    lock:contention_begin
    lock:contention_end

 - Misc smaller fixes & cleanups

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

x86_core_for_v5.19_rc1

- Remove all the code around GS switching on 32-bit now that it is not
needed anymore

- Other misc improvements

Ubuntu-hwe-5.13-5.13.0-46.51_20.04.1

Ubuntu-hwe-5.13-5.13.0-46.51~20.04.1

x86_cleanups_for_v5.19_rc1

- Serious sanitization and cleanup of the whole APERF/MPERF and
frequency invariance code along with removing the need for unnecessary IPIs

- Finally remove a.out support

- The usual trivial cleanups and fixes all over x86

x86_build_for_v5.19_rc1

- Add a "make x86_debug.config" target which enables a bunch of useful
config debug options when trying to debug an issue

- A gcc12 build warnings fix