linux-kernel - [PATCH RFC tip/core/rcu 0/4] Updates to RCU_FAST_NO

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Message-ID: <20120423161539.GA6467@linux.vnet.ibm.com>
Date:	Mon, 23 Apr 2012 09:15:39 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, 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, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com, darren@...art.com,
	fweisbec@...il.com, patches@...aro.org
Subject: [PATCH RFC tip/core/rcu 0/4] Updates to RCU_FAST_NO_HZ

Hello!

This series covers enhancements to RCU_FAST_NO_HZ intended for v3.4-rc2.
The individual commits are as follows:

1.	Add tracing to rcu_cleanup_after_idle().
2.	Switch from hrtimer to normal timers to reduce overhead.
3.	Upgrade RCU_FAST_NO_HZ state machine to better account for
	brief pauses out of idle, which can happen due to power-management
	actions, Steven Rostedt's new RCU-idle-capable tracing macros,
	or my RCU_NONIDLE() macro.
4.	Use add_timer_on() to avoid timer migration.

							Thanx, Paul


 b/include/trace/events/rcu.h |    1 
 b/kernel/rcutree.c           |    2 
 b/kernel/rcutree.h           |    1 
 b/kernel/rcutree_plugin.h    |    1 
 kernel/rcutree_plugin.h      |  112 ++++++++++++++++++++++++++++---------------
 5 files changed, 80 insertions(+), 37 deletions(-)

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