linux/kernel/time
Linus Torvalds cb95904b47 Scheduler updates:
Kconfig updates:
 
  - Simplify PREEMPT_DYNAMIC (Mark Rutland)
 
 Fair scheduler updates:
 
  - Remove redundant RUN_TO_PARITY check (Elif Topuz)
 
  - Declare augmented callbacks per field, fix rb_add_augmented_cached()
    descent (Yiwei Lin, Peter Zijlstra)
 
  - Restart fair hrtick after same-task repicks (Shubhang Kaushik)
 
  - Improve the scheduling latency of short slice tasks (Vincent Guittot)
 
 Deadline/RT scheduler updates:
 
  - Check start_dl_timer expiry with ktime_before()
    (Liang Hao)
 
  - irq_work: CPU-hotplug improvements on PREEMPT_RT (Sebastian Andrzej
    Siewior)
 
 Energy-aware scheduling updates:
 
  - Implement the steal_governor, introduce preferred CPUs and
    steal-driven vCPU backoff (Shrikanth Hegde)
 
 Multi-processor load-balancing updates:
 
  - Enable preferred SMT siblings on NVIDIA Olympus (Andrea Righi)
 
  - Randomize equally shallow idle CPU picks (Christian Loehle)
 
  - Remove redundant core_sched_seq (Hui Su)
 
 Cache-aware scheduling updates:
 
  - Avoid publishing partial LLC utilization (Jemmy Wong)
 
 NUMA-balancing updates:
 
  - Reset NUMA fault locality after scan period update (Eric Kim)
 
 Proxy execution updates:
 
  - Ongoing work to implement sleeping owner handling for proxy
    execution (John Stultz, Vasily Gorbik)
 
  - Preparatory steps to make sched_ext compatible with proxy
    execution (Andrea Righi)
 
 Scheduler infrastructure updates & fixes:
 
  - Remove the RCU wait from PSI trigger destruction (Shakeel Butt)
 
  - Avoid modifying wait-entry on failed priority registration
    (Hui Su)
 
  - Use the new static key API for sched_feat (Hongyan Xia)
 
  - Convert paravirt_steal to new static key APIs (Hongyan Xia)
 
  - cputime: Don't account idle time twice after dyntick-idle
    (Stian Halseth)
 
 Scheduler debugging updates:
 
  - Set TIF_NEED_RESCHED before calling __trace_set_need_resched()
    (Sechang Lim)
 
  - Fix context analysis errors in non-preferred CPU push (Shrikanth
    Hegde)
 
 Misc cleanups and fixes by Christian Loehle, Shubhang Kaushik,
 Thomas Huth and Vladimir Zapolskiy.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2026-10-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler updates from Ingo Molnar:
 "Kconfig updates:

   - Simplify PREEMPT_DYNAMIC (Mark Rutland)

  Fair scheduler updates:

   - Remove redundant RUN_TO_PARITY check (Elif Topuz)

   - Declare augmented callbacks per field, fix
     rb_add_augmented_cached() descent (Yiwei Lin, Peter Zijlstra)

   - Restart fair hrtick after same-task repicks (Shubhang Kaushik)

   - Improve the scheduling latency of short slice tasks (Vincent
     Guittot)

  Deadline/RT scheduler updates:

   - Check start_dl_timer expiry with ktime_before() (Liang Hao)

   - irq_work: CPU-hotplug improvements on PREEMPT_RT (Sebastian Andrzej
     Siewior)

  Energy-aware scheduling updates:

   - Implement the steal_governor, introduce preferred CPUs and
     steal-driven vCPU backoff (Shrikanth Hegde)

  Multi-processor load-balancing updates:

   - Enable preferred SMT siblings on NVIDIA Olympus (Andrea Righi)

   - Randomize equally shallow idle CPU picks (Christian Loehle)

   - Remove redundant core_sched_seq (Hui Su)

  Cache-aware scheduling updates:

   - Avoid publishing partial LLC utilization (Jemmy Wong)

  NUMA-balancing updates:

   - Reset NUMA fault locality after scan period update (Eric Kim)

  Proxy execution updates:

   - Ongoing work to implement sleeping owner handling for proxy
     execution (John Stultz, Vasily Gorbik)

   - Preparatory steps to make sched_ext compatible with proxy execution
     (Andrea Righi)

  Scheduler infrastructure updates & fixes:

   - Remove the RCU wait from PSI trigger destruction (Shakeel Butt)

   - Avoid modifying wait-entry on failed priority registration
     (Hui Su)

   - Use the new static key API for sched_feat (Hongyan Xia)

   - Convert paravirt_steal to new static key APIs (Hongyan Xia)

   - cputime: Don't account idle time twice after dyntick-idle
     (Stian Halseth)

  Scheduler debugging updates:

   - Set TIF_NEED_RESCHED before calling __trace_set_need_resched()
     (Sechang Lim)

   - Fix context analysis errors in non-preferred CPU push (Shrikanth
     Hegde)

  Misc cleanups and fixes by Christian Loehle, Shubhang Kaushik,
  Thomas Huth and Vladimir Zapolskiy"

* tag 'sched-core-2026-10-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
  sched: Replace nr_iowait_cpu() with a bool accessor
  Revert "sched/fair: Remove dead code on enqueue_task_fair()"
  sched/cache: Avoid publishing partial LLC utilization
  sched/cputime: Don't account idle time twice after dyntick-idle
  sched/psi: Remove the RCU wait from trigger destruction
  sched/eevdf: Remove redundant RUN_TO_PARITY check
  sched/wait: Avoid modifying entry on failed priority registration
  rbtree_test: Use rb_add_augmented_cached() for the cached augmented test
  rbtree: Update augmented data on the way down in rb_add_augmented_cached()
  rbtree: Declare augmented callbacks per field with RB_AUG()
  rbtree_test: Use rb_add() and rb_add_cached() for the basic tests
  smpboot: Don't park the thread if work is pending
  irq_work: Flush lazy work CPU down on PREEMPT_RT
  irq_work: Update a comment regarding CPU hotplug invocation
  sched/topology: Add asymmetric SMT packing override
  sched/fair: Honor asymmetric SMT priority in idle selection
  sched: Set TIF_NEED_RESCHED before calling __trace_set_need_resched()
  sched/core: Fix context analysis errors in non-preferred CPU push
  virt/steal_governor: Enable the driver
  virt/steal_governor: Implement steal_governor policy loop
  ...
2026-10-20 12:35:35 -10:00
..
.kunitconfig time/kunit: Add .kunitconfig 2026-02-24 08:41:51 +01:00
alarmtimer.c alarmtimer: Remove stale return description from alarm_handle_timer() 2026-05-06 08:33:08 +02:00
clockevents.c tick/broadcast: Plug clockevents replacement race 2026-09-07 11:10:20 +02:00
clocksource-wdtest.c clocksource: Rewrite watchdog code completely 2026-03-20 13:36:32 +01:00
clocksource.c clocksource: Unregister subsystem on device registration failure 2026-07-07 23:26:58 +02:00
hrtimer.c hrtimer: Use hard expiry when updating timers on the same base 2026-09-11 10:15:42 +02:00
itimer.c timers/itimer: Zero-init old itimerval before copy to userspace 2026-08-11 15:43:12 +02:00
jiffies.c time/jiffies: Saturate in mult_hz() instead of wrapping 2026-09-29 10:00:40 +02:00
Kconfig nohz: Replace dead select with choice default 2026-08-11 15:37:23 +02:00
Makefile timens: Remove dependency on the vDSO 2026-03-26 15:44:23 +01:00
namespace_internal.h timens: Remove dependency on the vDSO 2026-03-26 15:44:23 +01:00
namespace_vdso.c vdso/datastore: Explicitly prevent remote access to timens vvar page 2026-07-07 23:52:52 +02:00
namespace.c time/namespace: Validate nanosecond field in proc_timens_set_offset() 2026-07-07 23:26:58 +02:00
ntp_internal.h timekeeping: Drive time_offset skew via per-tick ntp_error transfer 2026-07-10 09:20:54 +02:00
ntp.c ntp: Remove tick_length_base, use tick_length directly 2026-07-10 09:20:55 +02:00
posix-clock.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
posix-cpu-timers.c posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list 2026-09-19 22:56:22 +02:00
posix-stubs.c posix-timers: Get rid of [COMPAT_]SYS_NI() uses 2023-12-20 21:30:27 -08:00
posix-timers.c posix-timers: Switch to hrtimer_start_expires_user() 2026-05-01 21:36:12 +02:00
posix-timers.h posix-timers: Expand timer_[re]arm() callbacks with a boolean return value 2026-05-01 21:36:11 +02:00
sched_clock.c time/sched_clock: Use ACCESS_PRIVATE() to evaluate hrtimer::function 2026-01-13 18:08:57 +01:00
sleep_timeout.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
test_udelay.c time: Add MODULE_DESCRIPTION() to time test modules 2024-06-03 11:18:50 +02:00
tick-broadcast-hrtimer.c clockevents: Remove redundant CLOCK_EVT_FEAT_KTIME 2026-02-27 16:40:06 +01:00
tick-broadcast.c tick/broadcast: Plug clockevents replacement race 2026-09-07 11:10:20 +02:00
tick-common.c clockevents: Prevent timer interrupt starvation 2026-04-10 22:45:38 +02:00
tick-internal.h tick/broadcast: Plug clockevents replacement race 2026-09-07 11:10:20 +02:00
tick-legacy.c
tick-oneshot.c treewide: Update email address 2026-01-11 06:09:11 -10:00
tick-sched.c sched/cputime: Don't account idle time twice after dyntick-idle 2026-10-16 09:49:03 +02:00
tick-sched.h tick/sched: Remove unused fields 2026-06-02 21:27:25 +02:00
time_test.c time/kunit: Document handling of negative years of is_leap() 2026-02-02 12:37:54 +01:00
time.c VDSO updates: 2026-08-18 16:56:25 -07:00
timeconst.bc
timeconv.c
timecounter.c time/timecounter: Inline timecounter_cyc2time() 2025-12-15 20:16:49 +01:00
timekeeping_debug.c timekeeping: Add percpu counter for tracking floor swap events 2024-10-10 10:20:46 +02:00
timekeeping_internal.h timekeeping: Move the vDSO update declarations into a private header 2026-07-07 23:48:08 +02:00
timekeeping.c timekeeping: Use u32 for clock_was_set_seq 2026-08-11 18:11:20 +02:00
timekeeping.h timekeeping: Use u32 for clock_was_set_seq 2026-08-11 18:11:20 +02:00
timer_list.c timer_list: Use ktime_t over nanoseconds 2026-08-11 18:11:20 +02:00
timer_migration.c timers/migration: Fix memory leak in tmigr_setup_groups() error path 2026-07-07 23:26:58 +02:00
timer_migration.h timers/migration: Fix bad line kernel-doc warning in struct tmigr_cpu 2026-07-20 16:07:39 +02:00
timer.c timer: Keep debugobjects state consistent in migrate_timer_list() 2026-08-18 10:51:43 +02:00
vsyscall.c vdso/vsyscall: Avoid slow division loop in auxiliary clock update 2025-09-03 11:55:11 +02:00