Linux 3.18.27-rt27-rc1

Dear RT Folks,

This is the RT stable review cycle of patch 3.18.27-rt27-rc1.

Please scream at me if I messed something up. Please test the patches too.

The -rc release will be uploaded to kernel.org and will be deleted when the final release is out. This is just a review release (or release candidate).

The pre-releases will not be pushed to the git repository, only the final release is.

If all goes well, this patch will be converted to the next main release on 3/7/2016.

Enjoy,

-- Steve

To build 3.18.27-rt27-rc1 directly, the following patches should be applied:

http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.18.tar.xz

http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.18.27.xz

http://www.kernel.org/pub/linux/kernel/projects/rt/3.18/patch-3.18.27-rt27-rc1.patch.xz

You can also build from 3.18.27-rt26 by applying the incremental patch:

http://www.kernel.org/pub/linux/kernel/projects/rt/3.18/incr/patch-3.18.27-rt26-rt27-rc1.patch.xz

Changes from 3.18.27-rt26:

---

Clark Williams (1):
rcu/torture: Comment out rcu_bh ops on PREEMPT_RT_FULL

Mike Galbraith (3):
sched,rt: __always_inline preemptible_lazy() drm,radeon,i915: Use preempt_disable/enable_rt() where recommended drm,i915: Use local_lock/unlock_irq() in intel_pipe_update_start/end()

Sebastian Andrzej Siewior (11):
sched: reset task's lockless wake-queues on fork()
ptrace: don't open IRQs in ptrace_freeze_traced() too early
net: move xmit_recursion to per-task variable on -RT
preempt-lazy: Add the lazy-preemption check to preempt_schedule()
softirq: split timer softirqs out of ksoftirqd
net: provide a way to delegate processing a softirq to ksoftirqd
latencyhist: disable jump-labels
kernel: migrate_disable() do fastpath in atomic & irqs-off
kernel: softirq: unlock with irqs on
kernel/stop_machine: partly revert "stop_machine: Use raw spinlocks"
kernel: sched: Fix preempt_disable_ip recodring for preempt_disable()

Steven Rostedt (Red Hat) (1):

      Linux 3.18.27-rt27-rc1

Thomas Gleixner (1):
tick/broadcast: Make broadcast hrtimer irqsafe

Yang Shi (3):
arm64: replace read_lock to rcu lock in call_step_hook
trace: Use rcuidle version for preemptoff_hist trace point
f2fs: Mutex can't be used by down_write_nest_lock()

----

 arch/Kconfig                            |   1 +
 arch/arm64/kernel/debug-monitors.c      |  21 +++---
 drivers/gpu/drm/i915/i915_irq.c         |   2 +
 drivers/gpu/drm/i915/intel_sprite.c     |  11 ++--
 drivers/gpu/drm/radeon/radeon_display.c |   2 +
 fs/f2fs/f2fs.h                          |   4 +-
 include/linux/ftrace.h                  |  12 ++++
 include/linux/interrupt.h               |   8 +++
 include/linux/netdevice.h               |   9 +++
 include/linux/sched.h                   |   3 +-
 include/trace/events/hist.h             |   1 +
 kernel/fork.c                           |   1 +
 kernel/ptrace.c                         |   6 +-
 kernel/rcu/rcutorture.c                 |   7 ++
 kernel/sched/core.c                     |  52 ++++++++-------
 kernel/softirq.c                        | 112 ++++++++++++++++++++++++++++----
 kernel/stop_machine.c                   |  40 +++---------
 kernel/time/tick-broadcast-hrtimer.c    |   1 +
 kernel/trace/trace_irqsoff.c            |   8 +--
 localversion-rt                         |   2 +-
 net/core/dev.c                          |  43 ++++++++++--
 21 files changed, 249 insertions(+), 97 deletions(-)