linux-kernel - [PATCH 0/7] nohz: Tick dependency mask v3

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Date:	Fri, 13 Nov 2015 15:22:02 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Chris Metcalf <cmetcalf@...hip.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	Christoph Lameter <cl@...ux.com>,
	Ingo Molnar <mingo@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Rik van Riel <riel@...hat.com>
Subject: [PATCH 0/7] nohz: Tick dependency mask v3 

This series changes the nohz full infrastructure to let subsystems notify
when they have a tick dependency. Checking if we can stop the tick is thus
perfomed in a push rather than a pull model, see previous iterations:
http://lkml.kernel.org/r/1437669735-8786-1-git-send-email-fweisbec@gmail.com

Changes here:

* Reuse fetch_or()
* Change posix cpu timers to a per thread and signal dependency (we may
  want to merge all that to thread level only) instead of global dependency.
* Scheduler tick dependency now is evaluated at the CPU level instead
  of the task level. We don't anymore depend on the current task policy
  but on the whole tasks of the runqueue. That too can be further optimized.
  
Only lightly tested, just checking for current state opinions.

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	timers/core-v5

HEAD: ca9e998d0be7e6ef1ffab888436cbabf5446c865

Thanks,
	Frederic
---

Frederic Weisbecker (7):
      atomic: Export fetch_or()
      nohz: New tick dependency mask
      perf: Migrate perf to use new tick dependency mask model
      sched: Account rr and fifo tasks separately
      sched: Migrate sched to use new tick dependency mask model
      posix-cpu-timers: Migrate to use new tick dependency mask model
      sched-clock: Migrate to use new tick dependency mask model


 include/linux/atomic.h         |  18 ++++++
 include/linux/perf_event.h     |   6 --
 include/linux/posix-timers.h   |   3 -
 include/linux/sched.h          |  11 +++-
 include/linux/tick.h           |  21 ++++++
 kernel/events/core.c           |  22 ++-----
 kernel/sched/clock.c           |   5 ++
 kernel/sched/core.c            |  47 ++++++--------
 kernel/sched/rt.c              |  34 ++++++++++
 kernel/sched/sched.h           |  49 ++++++++++----
 kernel/time/posix-cpu-timers.c |  52 ++++-----------
 kernel/time/tick-sched.c       | 142 +++++++++++++++++++++++++++++++++--------
 kernel/time/tick-sched.h       |   1 +
 13 files changed, 274 insertions(+), 137 deletions(-)
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