[GIT PULL] nohz: A few improvements v4

[Frederic Weisbecker]

Ingo,

Please pull the nohz/core branch (on top of tip:timers/core) that can be
found at:

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

HEAD: 60d0b4dc36259029e4cc8d030d8f59b33a119814

---
Summary of changes:

* Fix rare crashes due to context tracking recursion when faulting on
  vmalloc'ed areas.
* Simplify the TIF_NOHZ propagation (less context switch overhead)
* Set nohz full CPUs as isolcpus. This way we enforce nohz CPUs to be
  undisturbed by globally affine tasks.

Thanks,
	Frederic
---

Chris Metcalf (2):
      nohz: Add tick_nohz_full_add_cpus_to() API
      nohz: Set isolcpus when nohz_full is set

Frederic Weisbecker (2):
      context_tracking: Protect against recursion
      context_tracking: Inherit TIF_NOHZ through forks instead of context switches


 include/linux/context_tracking.h       | 10 -----
 include/linux/context_tracking_state.h |  1 +
 include/linux/sched.h                  |  3 ++
 include/linux/tick.h                   |  7 ++++
 kernel/context_tracking.c              | 68 +++++++++++++++++++++++-----------
 kernel/sched/core.c                    |  4 +-
 6 files changed, 60 insertions(+), 33 deletions(-)
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