Re: [GIT PULL rcu/next] RCU commits for 4.4

[Ingo Molnar <mingo@kernel.org>]

* Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:

> Hello, Ingo,
> 
> The changes in this series include the following:
> 
> 1.	Miscellaneous fixes.  These were posted to LKML at
> 	https://lkml.org/lkml/2015/10/6/496.
> 
> 2.	Improvements to expedited grace periods.  These were posted to
> 	LKML at https://lkml.org/lkml/2015/10/6/541.
> 
> 3.	Documentation updates.  These were posted to LKML at
> 	https://lkml.org/lkml/2015/10/6/560.
> 
> 4.	Performance improvements to and locktorture tests for percpu-rwsem.
> 	These were posted to LKML at https://lkml.org/lkml/2015/10/6/576.
> 
> 5.	Torture-test changes.  These were posted to LKML at
> 	https://lkml.org/lkml/2015/10/6/590.
> 
> All of these changes have been subjected to 0day Test Robot and -next
> testing, and are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo
> 
> for you to fetch changes up to 39cd2dd39a8b92ce91c4dad95f6e979c946a3942:
> 
>   Merge branches 'doc.2015.10.06a', 'percpu-rwsem.2015.10.06a' and 'torture.2015.10.06a' into HEAD (2015-10-07 16:06:25 -0700)
> 
> ----------------------------------------------------------------
> Boqun Feng (3):
>       rcu: Use rcu_callback_t in call_rcu*() and friends
>       rcu: Use call_rcu_func_t to replace explicit type equivalents
>       rcu: Don't disable preemption for Tiny and Tree RCU readers
> 
> Davidlohr Bueso (2):
>       sched: Export sched_setscheduler_nocheck
>       locktorture: Support rtmutex torturing
> 
> Jason A. Donenfeld (1):
>       documentation: Correct doc to use rcu_dereference_protected
> 
> Oleg Nesterov (9):
>       rcu: Create rcu_sync infrastructure
>       rcu_sync: Simplify rcu_sync using new rcu_sync_ops structure
>       rcu_sync: Add CONFIG_PROVE_RCU checks
>       rcu_sync: Introduce rcu_sync_dtor()
>       locking/percpu-rwsem: Make percpu_free_rwsem() after kzalloc() safe
>       locking/percpu-rwsem: Make use of the rcu_sync infrastructure
>       locking/percpu-rwsem: Fix the comments outdated by rcu_sync
>       locking/percpu-rwsem: Clean up the lockdep annotations in percpu_down_read()
>       rcu_sync: Cleanup the CONFIG_PROVE_RCU checks
> 
> Patrick Marlier (1):
>       rculist: Make list_entry_rcu() use lockless_dereference()
> 
> Paul E. McKenney (38):
>       rcu: Use rsp->expedited_wq instead of sync_rcu_preempt_exp_wq
>       rcu: Move rcu_report_exp_rnp() to allow consolidation
>       rcu: Consolidate tree setup for synchronize_rcu_expedited()
>       rcu: Use single-stage IPI algorithm for RCU expedited grace period
>       rcu: Move synchronize_sched_expedited() to combining tree
>       rcu: Rename qs_pending to core_needs_qs
>       rcu: Invert passed_quiesce and rename to cpu_no_qs
>       rcu: Make ->cpu_no_qs be a union for aggregate OR
>       rcu: Eliminate panic when silly boot-time fanout specified
>       rcu: Add online/offline info to stall warning message
>       rcu: Move preemption disabling out of __srcu_read_lock()
>       rcu: Correct comment for values of ->gp_state field
>       rcu: Add rcu_pointer_handoff()
>       rcu: Remove deprecated rcu_lockdep_assert()
>       rculist: Use WRITE_ONCE() when deleting from reader-visible list
>       documentation: No acquire/release for RCU readers
>       documentation: Call out slow consoles as cause of stall warnings
>       documentation: Catch up list of torture_type options
>       documentation: Add lockless_dereference()
>       locking/percpu-rwsem: Export symbols for locktorture
>       locktorture: Add torture tests for percpu_rwsem
>       torture: Consolidate cond_resched_rcu_qs() into stutter_wait()
>       rcutorture: Fix module unwind when bad torture_type specified
>       rcutorture: Fix unused-function warning for torturing_tasks()
>       torture: Forgive non-plural arguments
>       locktorture: Fix module unwind when bad torture_type specified
>       rcu: Switch synchronize_sched_expedited() to IPI
>       rcu: Stop silencing lockdep false positive for expedited grace periods
>       rcu: Stop excluding CPU hotplug in synchronize_sched_expedited()
>       cpu: Remove try_get_online_cpus()
>       rcu: Prepare for consolidating expedited CPU selection
>       rcu: Consolidate expedited CPU selection
>       rcu: Add online/offline info to expedited stall warning message
>       rcu: Add tasks to expedited stall-warning messages
>       rcu: Enable stall warnings for synchronize_rcu_expedited()
>       rcu: Better hotplug handling for synchronize_sched_expedited()
>       Merge branches 'fixes.2015.10.06a' and 'exp.2015.10.07a' into HEAD
>       Merge branches 'doc.2015.10.06a', 'percpu-rwsem.2015.10.06a' and 'torture.2015.10.06a' into HEAD
> 
> Petr Mladek (1):
>       rcu: Finish folding ->fqs_state into ->gp_state
> 
>  Documentation/RCU/stallwarn.txt                    |   7 +
>  Documentation/RCU/torture.txt                      |  39 +-
>  Documentation/RCU/trace.txt                        |  32 +-
>  Documentation/RCU/whatisRCU.txt                    |   6 +-
>  Documentation/kernel-parameters.txt                |   9 +-
>  Documentation/locking/locktorture.txt              |   3 +
>  Documentation/memory-barriers.txt                  |  12 +-
>  include/linux/cpu.h                                |   2 -
>  include/linux/list.h                               |   5 +-
>  include/linux/list_bl.h                            |   5 +-
>  include/linux/list_nulls.h                         |   3 +-
>  include/linux/percpu-rwsem.h                       |   3 +-
>  include/linux/rcu_sync.h                           |  86 ++++
>  include/linux/rculist.h                            |   5 +-
>  include/linux/rcupdate.h                           |  59 +--
>  include/linux/rcutiny.h                            |   3 +-
>  include/linux/rcutree.h                            |   2 +-
>  include/linux/sched.h                              |  10 +-
>  include/linux/srcu.h                               |   5 +-
>  kernel/cpu.c                                       |  13 -
>  kernel/exit.c                                      |   2 +
>  kernel/locking/locktorture.c                       | 164 ++++++-
>  kernel/locking/percpu-rwsem.c                      |  90 ++--
>  kernel/rcu/Makefile                                |   2 +-
>  kernel/rcu/rcutorture.c                            |  16 +-
>  kernel/rcu/srcu.c                                  |   4 +-
>  kernel/rcu/sync.c                                  | 223 +++++++++
>  kernel/rcu/tiny.c                                  |   8 +-
>  kernel/rcu/tree.c                                  | 512 ++++++++++++++++-----
>  kernel/rcu/tree.h                                  |  69 ++-
>  kernel/rcu/tree_plugin.h                           | 437 ++++++++++--------
>  kernel/rcu/tree_trace.c                            |  10 +-
>  kernel/rcu/update.c                                |   2 +-
>  kernel/sched/core.c                                |   1 +
>  kernel/torture.c                                   |   1 +
>  tools/testing/selftests/rcutorture/bin/kvm.sh      |   6 +-
>  .../selftests/rcutorture/configs/lock/CFLIST       |   4 +-
>  .../selftests/rcutorture/configs/lock/LOCK05       |   6 +
>  .../selftests/rcutorture/configs/lock/LOCK05.boot  |   1 +
>  .../selftests/rcutorture/configs/lock/LOCK06       |   6 +
>  .../selftests/rcutorture/configs/lock/LOCK06.boot  |   1 +
>  41 files changed, 1331 insertions(+), 543 deletions(-)
>  create mode 100644 include/linux/rcu_sync.h
>  create mode 100644 kernel/rcu/sync.c
>  create mode 100644 tools/testing/selftests/rcutorture/configs/lock/LOCK05
>  create mode 100644 tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot
>  create mode 100644 tools/testing/selftests/rcutorture/configs/lock/LOCK06
>  create mode 100644 tools/testing/selftests/rcutorture/configs/lock/LOCK06.boot

Pulled into tip:core/rcu, thanks a lot Paul!

	Ingo