linux-kernel - [PATCH tip/core/rcu 0/16] Expedited grace-period changes for 4.7

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Message-ID: <20160412152906.GA23395@linux.vnet.ibm.com>
Date:	Tue, 12 Apr 2016 08:29:06 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
	dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
	bobby.prani@...il.com
Subject: [PATCH tip/core/rcu 0/16] Expedited grace-period changes for 4.7

Hello!

This series contains updates for RCU's expedited grace-period facility:

1.	Make expedited RCU-sched grace period immediately detect idle.

2.	Make expedited RCU-preempt stall warnings count accurately.

3.	Make cond_resched_rcu_qs() supply RCU-sched expedited QS.

4.	Fix synchronize_rcu_expedited() header comment.

5.	Add event tracing definitions for expedited grace periods.

6.	Add funnel-locking tracing for expedited grace periods.

7.	Add expedited-grace-period event tracing.

8.	Remove expedited GP funnel-lock bypass.

9.	Force boolean subscript for expedited stall warnings.

10.	Shorten expedited_workdone* to exp_workdone*.

11.	Enforce expedited-GP fairness via funnel wait queue.

12.	Add exp_funnel_lock() fastpath for new funnel wait queue.

13.	Consolidate expedited GP code into rcu_exp_wait_wake().

14.	Consolidate expedited GP tracing into rcu_exp_gp_seq_snap().

15.	Consolidate expedited GP code into exp_funnel_lock().

16.	Overlap wakeups with next expedited grace period.

							Thanx, Paul

------------------------------------------------------------------------

 Documentation/RCU/trace.txt |   10 -
 include/trace/events/rcu.h  |   83 ++++++++++-
 kernel/rcu/tree.c           |  317 +++++++++++++++++++++++++-------------------
 kernel/rcu/tree.h           |   20 +-
 kernel/rcu/tree_plugin.h    |   57 +++----
 kernel/rcu/tree_trace.c     |   13 -
 6 files changed, 312 insertions(+), 188 deletions(-)