From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755178Ab1GJApj (ORCPT ); Sat, 9 Jul 2011 20:45:39 -0400 Received: from mail-yx0-f174.google.com ([209.85.213.174]:46829 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754908Ab1GJApg (ORCPT ); Sat, 9 Jul 2011 20:45:36 -0400 MIME-Version: 1.0 In-Reply-To: <20110709100900.GB6014@linux.vnet.ibm.com> References: <201107072047.14429.kernelmail.jms@gmail.com> <20110707195845.GD6014@linux.vnet.ibm.com> <201107072147.12751.kernelmail.jms@gmail.com> <20110708002903.GI6014@linux.vnet.ibm.com> <20110709100900.GB6014@linux.vnet.ibm.com> Date: Sun, 10 Jul 2011 01:45:35 +0100 Message-ID: Subject: Re: PROBLEM: 3.0-rc kernels unbootable since -rc3 From: julie Sullivan To: paulmck@linux.vnet.ibm.com Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, 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, torvalds@linux-foundation.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >Very good. I have created a new jms.2011.07.07a branch in the -rcu >git tree at: I get my own branch! :-) (thanks for all your trouble with this.) >Hello, Julie, >Any news? Sorry for the delay (again), I have to work very late Fridays and Saturdays. Anyway, I have tested the six commits on my v3.0-rc4 branch (with f8b7fc6b514f34a5 and a46e0899eec7a3069bc reverted) and can confirm that they _all_ produce a bootable kernel at my end. Btw, you may have noticed that my config has RCU_BOOST=n? If I build a simple v3.0-rc4 kernel (ie one which includes the four original commits (f8b7fc6b514, a46e0899eec, 09223371dea and 9a432736904)) but with RCU_BOOST=y it _will_ boot. I didn't know if this was helpful or not. If it is helpful, you probably know this, but in order to get RCU_BOOST=y I have to change a couple of other configs - PREEMPT_RCU=y (previously n) and to get PREEMPT_RCU=y, my preemption model has to be 'Preemptible Kernel (Low-Latency Desktop)' - PREEMPT=y (instead of 'Voluntary Kernel Preemption (Desktop)' - PREEMPT=n which it was originally). It's my day off tomorrow so I'll do some more testing (on -rc5 and -rc6) (past 1.30am here in the UK now). HTH, Julie