From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753113Ab1GTSpa (ORCPT ); Wed, 20 Jul 2011 14:45:30 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:39017 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752974Ab1GTSp1 (ORCPT ); Wed, 20 Jul 2011 14:45:27 -0400 Date: Wed, 20 Jul 2011 20:44:14 +0200 From: Ingo Molnar To: "Paul E. McKenney" Cc: Ben Greear , Linus Torvalds , Ed Tomlinson , 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 Message-ID: <20110720184413.GD17977@elte.hu> References: <20110720001738.GA16369@linux.vnet.ibm.com> <201107192130.02080.edt@aei.ca> <201107192207.33813.edt@aei.ca> <20110720044435.GB2400@linux.vnet.ibm.com> <20110720133443.GG2400@linux.vnet.ibm.com> <4E270A0E.6090902@candelatech.com> <20110720171532.GB2313@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110720171532.GB2313@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.3.1 -2.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Paul E. McKenney 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