linux-kernel - Re: [PATCH rcu/urgent 0/6] Fixes for RCU/scheduler/irq-threads trainwreck

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Message-ID: <20110720184413.GD17977@elte.hu>
Date:	Wed, 20 Jul 2011 20:44:14 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Ben Greear <greearb@...delatech.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ed Tomlinson <edt@....ca>, linux-kernel@...r.kernel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
	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,
	patches@...aro.org, edward.tomlinson@...o.bombardier.com
Subject: Re: [PATCH rcu/urgent 0/6] Fixes for RCU/scheduler/irq-threads
 trainwreck


* Paul E. McKenney <paulmck@...ux.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
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