Re: [GIT PULL rcu/next] RCU commits for 3.5

[Ingo Molnar <mingo@kernel.org>]

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

> Hello, Ingo,
> 
> The major features of this series are:
> 
> 1.	A set of improvements and fixes to the RCU_FAST_NO_HZ feature
> 	(with more on the way for 3.6).  Posted to LKML:
> 	https://lkml.org/lkml/2012/4/23/324 (commits 1-3 and 5), 
> 	https://lkml.org/lkml/2012/4/16/611 (commit 4),
> 	https://lkml.org/lkml/2012/4/30/390 (commit 6), and
> 	https://lkml.org/lkml/2012/5/4/410 (commit 7, combined with
> 	the other commits for the convenience of the tester).
> 2.	Changes to make rcu_barrier() avoid disrupting execution of CPUs
> 	that have no RCU callbacks.  Posted to LKML:
> 	https://lkml.org/lkml/2012/4/23/322.
> 3.	A couple of commits that improve the efficiency of the interaction
> 	between preemptible RCU and the scheduler, these two being all
> 	that survived an abortive attempt to allow preemptible RCU's
> 	__rcu_read_lock() to be inlined.  The full set was posted to
> 	LKML at https://lkml.org/lkml/2012/4/14/143, and the first and
> 	third patches of that set remain.
> 4.	Lai Jiangshan's algorithmic implementation of SRCU, which includes
> 	call_srcu() and srcu_barrier().  A major feature of this new
> 	implementation is that synchronize_srcu() no longer disturbs
> 	the execution of other CPUs.  This work is based on earlier
> 	implementations by Peter Zijlstra and myself.  Posted to
> 	LKML: https://lkml.org/lkml/2012/2/22/82.
> 5.	A number of miscellaneous bug fixes and improvements which were
> 	posted to LKML at: https://lkml.org/lkml/2012/4/23/353 with
> 	subsequent updates posted to LKML.
> 
> #1 and #2 are combined onto one topic branch due to dependencies among
> the commits.
> 
> All of these have 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
> 
> -------------------->
> Dave Jones (1):
>       rcu: List-debug variants of rcu list routines.
> 
> Jan Engelhardt (1):
>       rcu: Make __kfree_rcu() less dependent on compiler choices
> 
> Lai Jiangshan (10):
>       rcu: Remove fast check path from __synchronize_srcu()
>       rcu: Increment upper bit only for srcu_read_lock()
>       rcu: Flip ->completed only once per SRCU grace period
>       rcu: Improve SRCU's wait_idx() comments
>       rcu: Implement a variant of Peter's SRCU algorithm
>       rcu: Remove unused srcu_barrier()
>       rcu: Improve srcu_readers_active_idx()'s cache locality
>       rcu: Use single value to handle expedited SRCU grace periods
>       rcu: Implement per-domain single-threaded call_srcu() state machine
>       rcu: Add rcutorture test for call_srcu()
> 
> Michel Machado (1):
>       rcu: Replace list_first_entry_rcu() with list_first_or_null_rcu()
> 
> Paul E. McKenney (20):
>       rcu: Clarify help text for RCU_BOOST_PRIO
>       rcu: Reduce cache-miss initialization latencies for large systems
>       rcu: Document kernel command-line parameters
>       rcu: Document why rcu_blocking_is_gp() is safe
>       rcu: Add RCU_FAST_NO_HZ tracing for idle exit
>       rcu: Make RCU_FAST_NO_HZ use timer rather than hrtimer
>       rcu: Make RCU_FAST_NO_HZ account for pauses out of idle
>       rcu: Fixes to rcutorture error handling and cleanup
>       rcu: Add warning for RCU_FAST_NO_HZ timer firing
>       timer: Fix mod_timer_pinned() header comment
>       rcu: Introduce rcutorture testing for rcu_barrier()
>       rcu: Direct algorithmic SRCU implementation
>       rcu: Ensure that RCU_FAST_NO_HZ timers expire on correct CPU
>       rcu: Move PREEMPT_RCU preemption to switch_to() invocation
>       rcu: Make exit_rcu() more precise and consolidate
>       rcu: Update RCU maintainership
>       rcu: Make RCU_FAST_NO_HZ handle timer migration
>       rcu: Explicitly initialize RCU_FAST_NO_HZ per-CPU variables
>       rcu: Make rcu_barrier() less disruptive
>       Merge branches 'barrier.2012.05.09a', 'fixes.2012.04.26a', 'inline.2012.05.02b' and 'srcu.2012.05.07b' into HEAD
> 
>  Documentation/RCU/torture.txt       |   15 +-
>  Documentation/kernel-parameters.txt |   88 ++++++-
>  MAINTAINERS                         |   14 +-
>  arch/um/drivers/mconsole_kern.c     |    1 +
>  include/linux/rculist.h             |   40 +++-
>  include/linux/rcupdate.h            |   20 ++
>  include/linux/rcutiny.h             |   11 -
>  include/linux/rcutree.h             |   19 --
>  include/linux/sched.h               |   10 +
>  include/linux/srcu.h                |   48 +++-
>  include/trace/events/rcu.h          |    2 +
>  init/Kconfig                        |   50 +++-
>  kernel/rcupdate.c                   |   28 ++
>  kernel/rcutiny_plugin.h             |   16 -
>  kernel/rcutorture.c                 |  257 +++++++++++++++-
>  kernel/rcutree.c                    |  332 ++++++++++++++++------
>  kernel/rcutree.h                    |   23 +-
>  kernel/rcutree_plugin.h             |  154 +++++++----
>  kernel/rcutree_trace.c              |    4 +-
>  kernel/sched/core.c                 |    1 +
>  kernel/srcu.c                       |  548 +++++++++++++++++++++++++++-------
>  kernel/timer.c                      |    8 +-
>  lib/list_debug.c                    |   22 ++
>  23 files changed, 1358 insertions(+), 353 deletions(-)

Pulled, thanks a lot Paul!

	Ingo