linux-kernel - [PATCH RFC tip/core/rcu 0/3] RT latency optimizations

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Message-ID: <20131118220220.GA23353@linux.vnet.ibm.com>
Date:	Mon, 18 Nov 2013 14:02:20 -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, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com,
	edumazet@...gle.com, darren@...art.com, fweisbec@...il.com,
	sbw@....edu
Subject: [PATCH RFC tip/core/rcu 0/3] RT latency optimizations

Hello!

This series provides some minor latency optimizations for kernels that
build with CONFIG_RCU_NOCB_CPU_ALL=y:

1.	Create a static inline implementation of rcu_is_nocb_cpu() that
	unconditionally returns true when CONFIG_RCU_NOCB_CPU_ALL=y.

2.	Create a static inline implementation of rcu_needs_cpu() that
	unconditionally returns false when CONFIG_RCU_NOCB_CPU_ALL=y.

3.	Create static inline implementations of rcu_prepare_for_idle()
	and rcu_cleanup_after_idle() that are no-ops when
	CONFIG_RCU_NOCB_CPU_ALL=y.

							Thanx, Paul

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

 b/include/linux/rcupdate.h |   13 +++++++++++++
 b/include/linux/rcutiny.h  |    6 ------
 b/include/linux/rcutree.h  |    2 ++
 b/kernel/rcu/tree.c        |    2 +-
 b/kernel/rcu/tree_plugin.h |   13 +++++++++++--
 5 files changed, 27 insertions(+), 9 deletions(-)

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