[patch V2 00/10] hrtimer: Reprogramming and clock_was_set() overhaul

[Thomas Gleixner]

Folks!

This is the second version of the clock_was_set() overhaul together with
the avoidance of double reprogramming when rearming an enqueued timer.

Version 1 of those patches can be found here:

   https://lore.kernel.org/r/20210427082537.611978720@xxxxxxxxxxxxx
and
   https://lore.kernel.org/r/87v989topu.ffs@xxxxxxxxxxxxxxxxxxxxxxx

Both the reprogramming logic and the clock_was_set() logic are not really
optimized. The series addresses this.

  - Avoid double reprogramming when an enqueued timer is rearmed

  - Consolidate the reprogramming variants (Peter Zijlstra)

  - Fix the cases where the clock_was_set() handling is incorrect depending
    on configuration or runtime conditions.

  - Distangle the resume notification and the clock-was-set mechanism to
    prepare for IPI avoidance

  - Adopt Marcelo's patch to the modified code and add some more smarts on
    top.

The series is also available from git:

  git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git hrtimer

Changes vs V1:

  - Pick up Peter's consolidation patch
  - Polish a few things

Thanks,

	tglx
---
 fs/timerfd.c                |   16 ++
 include/linux/hrtimer.h     |    8 -
 kernel/time/hrtimer.c       |  337 +++++++++++++++++++++++++++++++-------------
 kernel/time/tick-common.c   |    7 
 kernel/time/tick-internal.h |   12 +
 kernel/time/timekeeping.c   |   36 ++--
 6 files changed, 299 insertions(+), 117 deletions(-)