linux-kernel - [PATCH tip/core/rcu 0/2] Callback tagging for 3.9

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Date:	Sat, 26 Jan 2013 16:18:04 -0800
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, edumazet@...gle.com, darren@...art.com,
	fweisbec@...il.com, sbw@....edu
Subject: [PATCH tip/core/rcu 0/2] Callback tagging for 3.9

Hello!

This series contains callback-tagging patches.  These were sent earlier
in the idle/no-CBs series, but have been isolated as the more trustworthy
part of that series.

1.	Tag callback lists with the grace-period number that they are
	waiting for.  This change enables a number of optimizations
	for RCU_FAST_NO_HZ, and though it add a bit of code, it greatly
	simplifies RCU's callback handling.
2.	Trace callback acceleration (which is when RCU notices that a
	group of callbacks doesn't actually need to wait as long as it
	previously thought).

							Thanx, Paul


 b/include/trace/events/rcu.h |    6 -
 b/kernel/rcutree.c           |  201 +++++++++++++++++++++++++++++++++++++------
 b/kernel/rcutree.h           |    2 
 3 files changed, 179 insertions(+), 30 deletions(-)

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