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From: Ingo Molnar <mingo@elte.hu>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Ben Greear <greearb@candelatech.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Ed Tomlinson <edt@aei.ca>,
	linux-kernel@vger.kernel.org, laijs@cn.fujitsu.com,
	dipankar@in.ibm.com, akpm@linux-foundation.org,
	mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org,
	niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org,
	rostedt@goodmis.org, Valdis.Kletnieks@vt.edu,
	dhowells@redhat.com, eric.dumazet@gmail.com, darren@dvhart.com,
	patches@linaro.org, edward.tomlinson@aero.bombardier.com
Subject: Re: [PATCH rcu/urgent 0/6] Fixes for RCU/scheduler/irq-threads trainwreck
Date: Wed, 20 Jul 2011 20:44:14 +0200	[thread overview]
Message-ID: <20110720184413.GD17977@elte.hu> (raw)
In-Reply-To: <20110720171532.GB2313@linux.vnet.ibm.com>


* Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:

> RCU boost is new and counts as strange for another few days at least.

I'd rather prefer a oneliner patch that turns it off in the Kconfig 
for now.

We are awfully late in the -rc cycle and this diffstat:

 b/include/linux/sched.h   |    3 ++
 b/kernel/rcutree_plugin.h |    6 +++--
 b/kernel/sched.c          |   44 ++++++++++++++++++++++++++++++++++-----
 b/kernel/signal.c         |   19 +++++++++++------
 b/kernel/softirq.c        |   12 +++++++++-
 kernel/rcutree_plugin.h   |   51 +++++++++++++++++++++++++++++++++-------------
 6 files changed, 105 insertions(+), 30 deletions(-)

looks very scary to me.

Thanks,

	Ingo

  reply	other threads:[~2011-07-20 18:45 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-20  0:17 [PATCH rcu/urgent 0/6] Fixes for RCU/scheduler/irq-threads trainwreck Paul E. McKenney
2011-07-20  0:18 ` [PATCH tip/core/urgent 1/7] rcu: decrease rcu_report_exp_rnp coupling with scheduler Paul E. McKenney
2011-07-20  2:40   ` Peter Zijlstra
2011-07-20  4:54     ` Paul E. McKenney
2011-07-20 11:23       ` Ed Tomlinson
2011-07-20 11:31         ` Ed Tomlinson
2011-07-20 12:35         ` Peter Zijlstra
2011-07-20 13:23         ` Paul E. McKenney
2011-07-20  0:18 ` [PATCH tip/core/urgent 2/7] rcu: Fix RCU_BOOST race handling current->rcu_read_unlock_special Paul E. McKenney
2011-07-20  0:18 ` [PATCH tip/core/urgent 3/7] rcu: Streamline code produced by __rcu_read_unlock() Paul E. McKenney
2011-07-20  0:18 ` [PATCH tip/core/urgent 4/7] rcu: protect __rcu_read_unlock() against scheduler-using irq handlers Paul E. McKenney
2011-07-20 12:54   ` Peter Zijlstra
2011-07-20 13:25     ` Paul E. McKenney
2011-07-20  0:18 ` [PATCH tip/core/urgent 5/7] sched: Add irq_{enter,exit}() to scheduler_ipi() Paul E. McKenney
2011-07-20  0:18 ` [PATCH tip/core/urgent 6/7] softirq,rcu: Inform RCU of irq_exit() activity Paul E. McKenney
2011-07-20  0:18 ` [PATCH tip/core/urgent 7/7] signal: align __lock_task_sighand() irq disabling and RCU Paul E. McKenney
2011-07-20  1:10 ` [PATCH rcu/urgent 0/6] Fixes for RCU/scheduler/irq-threads trainwreck Ben Greear
2011-07-20  1:30 ` Ed Tomlinson
2011-07-20  2:07   ` Ed Tomlinson
2011-07-20  4:44     ` Paul E. McKenney
2011-07-20  5:03       ` Linus Torvalds
2011-07-20 13:34         ` Paul E. McKenney
2011-07-20 17:02           ` Ben Greear
2011-07-20 17:15             ` Paul E. McKenney
2011-07-20 18:44               ` Ingo Molnar [this message]
2011-07-20 18:52                 ` Peter Zijlstra
2011-07-20 19:01                   ` Paul E. McKenney
2011-07-20 19:25                     ` Peter Zijlstra
2011-07-20 20:06                       ` Paul E. McKenney
2011-07-20 19:02                   ` Linus Torvalds
2011-07-20 19:29                     ` Paul E. McKenney
2011-07-20 19:39                       ` Ingo Molnar
2011-07-20 19:57                         ` Ingo Molnar
2011-07-20 20:33                           ` Paul E. McKenney
2011-07-20 20:54                             ` Ben Greear
2011-07-20 21:12                               ` Paul E. McKenney
2011-07-21  3:25                                 ` Ben Greear
2011-07-21 16:04                                   ` Paul E. McKenney
2011-07-20 21:04                           ` [GIT PULL] RCU fixes for v3.0 Ingo Molnar
2011-07-20 21:55                             ` Ed Tomlinson
2011-07-20 22:06                               ` Paul E. McKenney
2011-07-20 20:08                         ` [PATCH rcu/urgent 0/6] Fixes for RCU/scheduler/irq-threads trainwreck Paul E. McKenney
2011-07-20 21:05                       ` Peter Zijlstra
2011-07-20 21:39                         ` Paul E. McKenney
2011-07-20 10:49       ` Ed Tomlinson
2011-07-20 18:25 ` [PATCH rcu/urgent 0/7 v2] " Paul E. McKenney
2011-07-20 18:26   ` [PATCH tip/core/urgent 1/7] rcu: decrease rcu_report_exp_rnp coupling with scheduler Paul E. McKenney
2011-07-20 18:26   ` [PATCH tip/core/urgent 2/7] rcu: Fix RCU_BOOST race handling current->rcu_read_unlock_special Paul E. McKenney
2011-07-20 18:26   ` [PATCH tip/core/urgent 3/7] rcu: Streamline code produced by __rcu_read_unlock() Paul E. McKenney
2011-07-20 22:44     ` Linus Torvalds
2011-07-21  5:09       ` Paul E. McKenney
2011-07-20 18:26   ` [PATCH tip/core/urgent 4/7] rcu: protect __rcu_read_unlock() against scheduler-using irq handlers Paul E. McKenney
2011-07-20 18:26   ` [PATCH tip/core/urgent 5/7] sched: Add irq_{enter,exit}() to scheduler_ipi() Paul E. McKenney
2011-07-20 18:26   ` [PATCH tip/core/urgent 6/7] softirq,rcu: Inform RCU of irq_exit() activity Paul E. McKenney
2011-07-20 18:26   ` [PATCH tip/core/urgent 7/7] signal: align __lock_task_sighand() irq disabling and RCU Paul E. McKenney

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