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Groups > linux.kernel > #1522009

[PATCH v2 0/3] Stop sched tick in idle injection task

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Changelog:
v2:
	- moved duration timer from powerclamp driver to play_idle()
	- unexport cpuidle_use_deepest_state
	- indentation fix

Idle injection drivers today use RT threads to run idle loop. There are
efficiency and accounting issues with the current intel_powerclamp.c
and acpi_pad.c. A while ago, I posted CFS based idle injection patch trying
to address them:
https://lkml.org/lkml/2015/11/13/576

Peter proposed another approach with the introduction of a PF_IDLE flag.
This patchset is based on his original posting:
https://lkml.org/lkml/2014/6/4/56

These patches apply on top of the kworker and cpu hotplug state machine
changes made to Intel powerclamp driver.
https://lkml.org/lkml/2016/10/17/362

Similar changes to ACPI PAD driver is developed along with other
enhancements. It will be posted after this patchset is accepted.

Jacob Pan (2):
  cpuidle: allow setting deepest idle
  thermal/powerclamp: stop sched tick in forced idle

Peter Zijlstra (1):
  idle: add support for tasks that inject idle

 drivers/cpuidle/cpuidle.c          |  11 +++
 drivers/thermal/intel_powerclamp.c |  35 +-------
 include/linux/cpu.h                |   2 +
 include/linux/cpuidle.h            |   4 +-
 include/linux/sched.h              |   3 +-
 kernel/fork.c                      |   3 +
 kernel/sched/core.c                |   1 +
 kernel/sched/idle.c                | 177 +++++++++++++++++++++++--------------
 8 files changed, 136 insertions(+), 100 deletions(-)

-- 
1.9.1

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[PATCH v2 0/3] Stop sched tick in idle injection task Jacob Pan <jacob.jun.pan@linux.intel.com> - 2016-11-14 19:50 +0100
  [PATCH v2 2/3] cpuidle: allow setting deepest idle Jacob Pan <jacob.jun.pan@linux.intel.com> - 2016-11-14 20:00 +0100
    Re: [PATCH v2 2/3] cpuidle: allow setting deepest idle "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-11-14 22:40 +0100
      Re: [PATCH v2 2/3] cpuidle: allow setting deepest idle Jacob Pan <jacob.jun.pan@linux.intel.com> - 2016-11-15 18:00 +0100
  [PATCH v2 1/3] idle: add support for tasks that inject idle Jacob Pan <jacob.jun.pan@linux.intel.com> - 2016-11-14 20:00 +0100
  [PATCH v2 3/3] thermal/powerclamp: stop sched tick in forced idle Jacob Pan <jacob.jun.pan@linux.intel.com> - 2016-11-14 20:00 +0100

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