linux-kernel - [PATCH tip/core/rcu 0/5] In-kernel programmatic grace-period expediting for v4.1

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Date:	Tue, 3 Mar 2015 09:10:56 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, laijs@...fujitsu.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 0/5] In-kernel programmatic grace-period
 expediting for v4.1

Hello!

This series provides an in-kernel API to expedite and unexpedite normal
RCU grace-period primitives such as synchronize_rcu().  It also provides
a Kconfig parameter that implicitly expedites at boot time, along with
a function that notes the end of in-kernel boot.  This last function is
intended to be invoked just before init is spawned.

1.	Provide rcu_expedite_gp() and rcu_unexpedite_gp().

2.	Add rcu_expedite_gp() and rcu_unexpedite_gp() to rcutorture.

3.	Change open-coded references ot the rcu_expedited variable to
	instead use the new rcu_gp_is_expedited() function.

4.	Add a CONFIG_RCU_EXPEDITE_BOOT Kconfig parameter that emulates
	a very early boot rcu_expedite_gp().  Also provide a new
	rcu_end_inkernel_boot() function that provides the corresponding
	rcu_unexpedite_gp() if CONFIG_RCU_EXPEDITE_BOOT.

5.	Make consistent use of variables in rcu_torture_writer().

							Thanx, Paul

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

 b/include/linux/rcupdate.h |   21 ++++++++++++++++
 b/init/Kconfig             |   13 +++++++++
 b/kernel/rcu/rcutorture.c  |   27 +++++++++++++++++++-
 b/kernel/rcu/srcu.c        |    2 -
 b/kernel/rcu/tree.c        |    9 +++---
 b/kernel/rcu/tree_plugin.h |    2 -
 b/kernel/rcu/update.c      |   59 ++++++++++++++++++++++++++++++++++++++++++++-
 7 files changed, 125 insertions(+), 8 deletions(-)

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