linux-kernel - [PATCH RFC 0/6] Miscellaneous RCU fixes for 3.5

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Date:	Mon, 23 Apr 2012 09:41:59 -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 0/6] Miscellaneous RCU fixes for 3.5

Hello!

This series includes several miscellaneous fixes for RCU as follows:

1.	Make the rcu_blocking_is_gp() function properly guard against
	concurrent CPU-hotplug operations.
2.	Make __list_add_rcu() do pointer checks like __list_add() does,
	courtesy of Dave Jones.
3.	Replace the "unsafe at any speed" list_first_entry_rcu() macro
	with a safe and sane list_first_or_null_rcu(), courtesy of
	Michel Machado.
4.	Clarify help text for the RCU_BOOST_PRIO kernel config parameter.
5.	Convert __kfree_rcu() from an inline function to a macro in order
	to avoid spurious build failures should gcc fail to inline it.
	Courtesy of Jan Engelhardt.
6.	Reduce cache-miss initialization latencies for large systems.
	Given the widespread use of NR_CPUS=4096, there are a lot of
	large systems out there.

							Thanx, Paul


 b/include/linux/rculist.h  |    7 ++++++-
 b/include/linux/rcupdate.h |   18 ++++++++++++++++++
 b/include/linux/rcutree.h  |    7 ++++++-
 b/init/Kconfig             |   23 +++++++++++++++++++----
 b/kernel/rcutree.c         |    2 +-
 b/kernel/rcutree.h         |   10 +++-------
 b/lib/list_debug.c         |   22 ++++++++++++++++++++++
 include/linux/rculist.h    |   33 +++++++++++++++++++++++++++++----
 init/Kconfig               |   27 +++++++++++++++++++++++++++
 9 files changed, 131 insertions(+), 18 deletions(-)

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