linux-kernel - [PATCH 00/11] rcu: Detect illegal uses of RCU in idle and fix some v5

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Date:	Fri,  7 Oct 2011 18:21:59 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andy Henroid <andrew.d.henroid@...el.com>,
	Mike Frysinger <vapier@...too.org>,
	Guan Xuetao <gxt@...c.pku.edu.cn>,
	David Miller <davem@...emloft.net>,
	Chris Metcalf <cmetcalf@...era.com>,
	Hans-Christian Egtvedt <hans-christian.egtvedt@...el.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Russell King <linux@....linux.org.uk>,
	Paul Mackerras <paulus@...ba.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Paul Mundt <lethal@...ux-sh.org>,
	Lai Jiangshan <laijs@...fujitsu.com>
Subject: [PATCH 00/11] rcu: Detect illegal uses of RCU in idle and fix some v5

Hi Paul,

Here is the rebase. And it's more than just a rebase given the
semantical changes after your patch that tracks idleness. And also
because of the new API naming (with a new pair of tick_nohz_idle_enter()
tick_nohz_idle_exit() with *_norcu suffixes).

I have reused and updated some comments (that you made on earlier
versions of my patchset) that assumed that extended qs = dynticks
idle, as it's not always true anymore. I've tried to bring a new
wording to express what we are dealing with: "RCU-free window in idle"
or "RCU-idle window". I let you update the comments if you think
that's confusing or too scarce.

It has passed several hours of rcutorture with NO_HZ && SMP, and at least
booted fine with all your configs.

Frederic Weisbecker (9):
  rcu: Detect illegal rcu dereference in extended quiescent state
  rcu: Inform the user about extended quiescent state on PROVE_RCU warning
  rcu: Warn when rcu_read_lock() is used in extended quiescent state
  rcu: Make srcu_read_lock_held() call common lockdep-enabled function
  nohz: Separate out irq exit and idle loop dyntick logic
  nohz: Allow rcu extended quiescent state handling seperately from tick stop
  x86: Enter rcu extended qs after idle notifier call
  x86: Call idle notifier after irq_enter()
  rcu: Fix early call to rcu_idle_enter()

Paul E. McKenney (2):
  rcu: Remove one layer of abstraction from PROVE_RCU checking
  rcu: Warn when srcu_read_lock() is used in an extended quiescent state

 arch/arm/kernel/process.c                |    4 +-
 arch/avr32/kernel/process.c              |    4 +-
 arch/blackfin/kernel/process.c           |    4 +-
 arch/microblaze/kernel/process.c         |    4 +-
 arch/mips/kernel/process.c               |    4 +-
 arch/openrisc/kernel/idle.c              |    4 +-
 arch/powerpc/kernel/idle.c               |    4 +-
 arch/powerpc/platforms/iseries/setup.c   |    8 +-
 arch/s390/kernel/process.c               |    4 +-
 arch/sh/kernel/idle.c                    |    4 +-
 arch/sparc/kernel/process_64.c           |    4 +-
 arch/tile/kernel/process.c               |    4 +-
 arch/um/kernel/process.c                 |    4 +-
 arch/unicore32/kernel/process.c          |    4 +-
 arch/x86/kernel/apic/apic.c              |    6 +-
 arch/x86/kernel/apic/io_apic.c           |    2 +-
 arch/x86/kernel/cpu/mcheck/therm_throt.c |    2 +-
 arch/x86/kernel/cpu/mcheck/threshold.c   |    2 +-
 arch/x86/kernel/irq.c                    |    6 +-
 arch/x86/kernel/process_32.c             |    4 +-
 arch/x86/kernel/process_64.c             |   10 +++-
 include/linux/rcupdate.h                 |   74 +++++++++++++++--------
 include/linux/srcu.h                     |   38 ++++++++----
 include/linux/tick.h                     |   52 ++++++++++++++--
 kernel/lockdep.c                         |   22 +++++++
 kernel/rcupdate.c                        |    4 +
 kernel/rcutiny.c                         |    1 +
 kernel/rcutree.c                         |   19 +++++-
 kernel/softirq.c                         |    4 +-
 kernel/time/tick-sched.c                 |   96 ++++++++++++++++++-----------
 30 files changed, 273 insertions(+), 129 deletions(-)

-- 
1.7.5.4

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