linux-kernel - [GIT PULL v2] dynticks updates for 3.14

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Date:	Tue,  3 Dec 2013 15:38:20 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Olivier Langlois <olivier@...vierlanglois.net>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [GIT PULL v2] dynticks updates for 3.14

Ingo,

Please pull the timers/core-v2 branch that can be found at:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	timers/core-v2

It's a rebase of the previous pull request against 3.13-rc2 which addresses
your reviews:

* Fix build error with tick_check_nohz() off case

* Refine changelog of "posix-timers: Fix full dynticks CPUs kick on timer rescheduling"
  to make it clearer that it's a bug fix and not just an optimization.
  Also add more overall details in the changelog about the description of the issue.

* Rename tick_check_nohz() and tick_check_oneshot_broadcast() to extend with *_this_cpu()
  suffix. Note that I left functions that use *_idle_* based naming as is because idle
  itself is a per cpu notion already. Now I can still extend these functions as well
  in a delta if you want, although IMHO I fear that would uglify the code more than helping.

---
Here is a summary of the overall changes against tip:timers/core :

* Optimizations and cleanups on the use of per CPU APIs to improve code readability,
performance and debuggability in the nohz subsystem;

* Rename some functions to extend with *_this_cpu() suffix for clarity

* Refine the naming of some context tracking subsystem state accessors

* Optimize posix cpu timer by sparing stub workqueue queue with full dynticks off case

* Trivial spelling fix by Paul Gortmaker

* Fix a bug where posix cpu timers requeued due to interval got ignored on full
  dynticks CPUs (not a regression though as it only impacts full dynticks and the
  bug is there since we merged full dynticks).


Let me know if you find any issue.

Thanks,
	Frederic
---

Frederic Weisbecker (5):
      nohz: Convert a few places to use local per cpu accesses
      context_tracking: Wrap static key check into more intuitive function name
      context_tracking: Rename context_tracking_active() to context_tracking_cpu_is_enabled()
      posix-timers: Spare workqueue if there is no full dynticks CPU to kick
      posix-timers: Fix full dynticks CPUs kick on timer rescheduling

Paul Gortmaker (1):
      trivial: fix spelling in CONTEXT_TRACKING_FORCE help text


 include/linux/context_tracking.h       | 10 ++++-----
 include/linux/context_tracking_state.h | 11 +++++++---
 include/linux/tick.h                   |  8 +++----
 include/linux/vtime.h                  |  4 ++--
 init/Kconfig                           |  2 +-
 kernel/context_tracking.c              |  8 +++----
 kernel/posix-cpu-timers.c              | 21 ++++++++----------
 kernel/softirq.c                       |  4 +---
 kernel/time/tick-broadcast.c           |  6 +++---
 kernel/time/tick-internal.h            |  4 ++--
 kernel/time/tick-sched.c               | 39 ++++++++++++++--------------------
 11 files changed, 55 insertions(+), 62 deletions(-)
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