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* [GIT PULL rcu/next] RCU commits for 3.6
@ 2012-07-06 14:01 Paul E. McKenney
  2012-07-06 14:17 ` Ingo Molnar
  0 siblings, 1 reply; 2+ messages in thread
From: Paul E. McKenney @ 2012-07-06 14:01 UTC (permalink / raw)
  To: mingo
  Cc: linux-kernel, josh, heiko.carstens, pascal.chapperon, wfg, C.Emde,
	mathieu.desnoyers, dhowells, efault, levinsasha928

Hello, Ingo,

The major features of this series are:

1.	Preventing latency spikes of more than 200 microseconds for
	kernels built with NR_CPUS=4096, which is reportedly becoming
	the default for some distros.  This is a first step, as it does
	not help with systems that actually -have- 4096 CPUs (work on
	this case is in progress, but is not yet ready for mainline).
	This category also includes improving concurrency of rcu_barrier(),
	placed here due to conflicts.  Posted to LKML at:
	https://lkml.org/lkml/2012/6/22/381.  Note that patches 18-22
	of that series have been defered to 3.7, as they have not yet
	proven themselves to be mainline-ready (and yes, these are the
	ones intended to get rid of RCU's latency spikes for systems
	that actually have 4096 CPUs).
2.	Updates to documentation and rcutorture fixes, the latter category
	including improvements to rcu_barrier() testing.  Posted to LKML at:
	http://lkml.indiana.edu/hypermail/linux/kernel/1206.1/04094.html.
3.	Miscellaneous fixes posted to LKML at:
	https://lkml.org/lkml/2012/6/22/500, with the exception of the
	last commit, which was posted here:
	http://www.gossamer-threads.com/lists/linux/kernel/1561830
4.	RCU_FAST_NO_HZ fixes and improvements.  Posted to LKML at:
	http://lkml.indiana.edu/hypermail/linux/kernel/1206.1/00006.html
	and http://www.gossamer-threads.com/lists/linux/kernel/1561833.
	The first four patches of the first series went into 3.5 to fix
	a regression.
5.	Code-style fixes.  These were posted to LKML at
	http://lkml.indiana.edu/hypermail/linux/kernel/1205.2/01180.html and
	http://lkml.indiana.edu/hypermail/linux/kernel/1205.2/01181.html.

All of this code has been exposed to -next testing.

These changes are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next

								Thanx, Paul

-------------------->
Carsten Emde (1):
      rcu: Prevent uninitialized string in RCU CPU stall info

Paul E. McKenney (48):
      rcu: Control RCU_FANOUT_LEAF from boot-time parameter
      rcu: Four-level hierarchy is no longer experimental
      rcu: Size rcu_node tree from nr_cpu_ids rather than NR_CPUS
      rcu: Prevent excessive line length in RCU_STATE_INITIALIZER()
      rcu: Place pointer to call_rcu() in rcu_data structure
      rcu: Move _rcu_barrier()'s rcu_head structures to rcu_data structures
      rcu: Move rcu_barrier_cpu_count to rcu_state structure
      rcu: Move rcu_barrier_completion to rcu_state structure
      rcu: Move rcu_barrier_mutex to rcu_state structure
      rcu: Remove needless initialization
      rcu: Increase rcu_barrier() concurrency
      rcu: Add tracing for _rcu_barrier()
      rcu: Add rcu_barrier() statistics to debugfs tracing
      rcu: Remove unneeded __rcu_process_callbacks() argument
      rcu: Introduce for_each_rcu_flavor() and use it
      rcu: Use for_each_rcu_flavor() in TREE_RCU tracing
      rcu: RCU_SAVE_DYNTICK code no longer ever dead
      rcu: Update documentation to cover call_srcu() and srcu_barrier().
      rcu: Rationalize ordering of torture_ops list
      rcu: Test srcu_barrier() from rcutorture test suite
      rcu: Fix bug in rcu_barrier() torture test
      rcu: Fix diagnostic-printk typo in rcutorture
      rcu: Make rcutorture fakewriters invoke rcu_barrier()
      rcu: Fix detection of abruptly-ending stall
      rcu: Consolidate duplicate callback-list initialization
      rcu: Add ACCESS_ONCE() to ->qlen accesses
      rcu: Add a gcc-style structure initializer for RCU pointers
      rcu: Use new RCU_POINTER_INITIALIZER for gcc-style initializations
      rcu: Remove return value from RCU_INIT_POINTER()
      key: Remove extraneous parentheses from rcu_assign_keypointer()
      rcu: Remove return value from rcu_assign_pointer()
      rcu: Consolidate tree/tiny __rcu_read_{,un}lock() implementations
      rcu: Remove function versions of __kfree_rcu and __is_kfree_rcu_offset
      rcu: Make __call_rcu() handle invocation from idle
      rcu: Prevent __call_rcu() from invoking RCU core on offline CPUs
      rcu: Split RCU core processing out of __call_rcu()
      rcu: Fix rcu_is_cpu_idle() #ifdef in TINY_RCU
      rcu: Disable preemption in rcu_blocking_is_gp()
      rcu: Add check for CPUs going offline with callbacks queued
      rcu: Dump only the current CPU's buffers for idle-entry/exit warnings
      rcu: The rcu_needs_cpu() function is not a quiescent state
      rcu: Round FAST_NO_HZ lazy timeout to nearest second
      rcu: Fix qlen_lazy breakage
      rcu: Make RCU_FAST_NO_HZ respect nohz= boot parameter
      rcu: Introduce check for callback list/count mismatch
      Merge branches 'bigrtm.2012.07.04a', 'doctorture.2012.07.02a', 'fixes.2012.07.06a' and 'fnh.2012.07.02a' into HEAD
      rcu: Fix code-style issues involving "else"
      rcu: Fix broken strings in RCU's source code.

 Documentation/RCU/checklist.txt     |   39 ++--
 Documentation/RCU/rcubarrier.txt    |   15 +-
 Documentation/RCU/torture.txt       |    9 +
 Documentation/RCU/whatisRCU.txt     |    6 +-
 Documentation/kernel-parameters.txt |    5 +
 include/linux/init_task.h           |    4 +-
 include/linux/key.h                 |    4 +-
 include/linux/rcupdate.h            |   53 ++---
 include/trace/events/rcu.h          |   45 ++++
 kernel/rcupdate.c                   |   44 ++++
 kernel/rcutiny.c                    |    4 +-
 kernel/rcutiny_plugin.h             |   56 +----
 kernel/rcutorture.c                 |   72 ++++--
 kernel/rcutree.c                    |  478 ++++++++++++++++++++++------------
 kernel/rcutree.h                    |   46 ++--
 kernel/rcutree_plugin.h             |  223 ++++-------------
 kernel/rcutree_trace.c              |  148 ++++++-----
 kernel/time/tick-sched.c            |    2 +-
 lib/list_debug.c                    |    6 +-
 19 files changed, 669 insertions(+), 590 deletions(-)


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2012-07-06 14:01 [GIT PULL rcu/next] RCU commits for 3.6 Paul E. McKenney
2012-07-06 14:17 ` Ingo Molnar

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