Re: [patch 00/48] hrtimer,sched: General optimizations and hrtick enablement

[Peter Zijlstra]

On Tue, Feb 24, 2026 at 05:35:12PM +0100, Thomas Gleixner wrote:

> The series applies on v7.0-rc1 and is also available from git:
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git sched/hrtick

If you'd have added the shortlog, you'd have made nearly 350 lines :-)

Peter Zijlstra (11):
      sched/eevdf: Fix HRTICK duration
      hrtimer: Avoid pointless reprogramming in __hrtimer_start_range_ns()
      hrtimer: Provide LAZY_REARM mode
      sched/hrtick: Mark hrtick timer LAZY_REARM
      hrtimer: Re-arrange hrtimer_interrupt()
      hrtimer: Prepare stubs for deferred rearming
      entry: Prepare for deferred hrtimer rearming
      softirq: Prepare for deferred hrtimer rearming
      sched/core: Prepare for deferred hrtimer rearming
      hrtimer: Push reprogramming timers into the interrupt return path
      sched: Default enable HRTICK when deferred rearming is enabled

Peter Zijlstra (Intel) (2):
      sched/fair: Simplify hrtick_update()
      sched/fair: Make hrtick resched hard

Thomas Gleixner (35):
      sched: Avoid ktime_get() indirection
      hrtimer: Provide a static branch based hrtimer_hres_enabled()
      sched: Use hrtimer_highres_enabled()
      sched: Optimize hrtimer handling
      sched/hrtick: Avoid tiny hrtick rearms
      tick/sched: Avoid hrtimer_cancel/start() sequence
      clockevents: Remove redundant CLOCK_EVT_FEAT_KTIME
      timekeeping: Allow inlining clocksource::read()
      x86: Inline TSC reads in timekeeping
      x86/apic: Remove pointless fence in lapic_next_deadline()
      x86/apic: Avoid the PVOPS indirection for the TSC deadline timer
      timekeeping: Provide infrastructure for coupled clockevents
      clockevents: Provide support for clocksource coupled comparators
      x86/apic: Enable TSC coupled programming mode
      hrtimer: Add debug object init assertion
      hrtimer: Reduce trace noise in hrtimer_start()
      hrtimer: Use guards where appropriate
      hrtimer: Cleanup coding style and comments
      hrtimer: Evaluate timer expiry only once
      hrtimer: Replace the bitfield in hrtimer_cpu_base
      hrtimer: Convert state and properties to boolean
      hrtimer: Optimize for local timers
      hrtimer: Use NOHZ information for locality
      hrtimer: Separate remove/enqueue handling for local timers
      hrtimer: Add hrtimer_rearm tracepoint
      hrtimer: Rename hrtimer_cpu_base::in_hrtirq to deferred_rearm
      hrtimer: Avoid re-evaluation when nothing changed
      hrtimer: Keep track of first expiring timer per clock base
      hrtimer: Rework next event evaluation
      hrtimer: Simplify run_hrtimer_queues()
      hrtimer: Optimize for_each_active_base()
      rbtree: Provide rbtree with links
      timerqueue: Provide linked timerqueue
      hrtimer: Use linked timerqueue
      hrtimer: Try to modify timers in place


Anyway, since I've been staring at these patches for over a week now:

Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>

You want me to go queue them in tip/sched/hrtick, tip/timer/hrick and
then merge both into tip/sched/core and have tip/timer/core only include
tip/timer/hrtick or something?