Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933353AbaLBUa7 (ORCPT ); Tue, 2 Dec 2014 15:30:59 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60793 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932844AbaLBUa5 (ORCPT ); Tue, 2 Dec 2014 15:30:57 -0500 Date: Tue, 2 Dec 2014 15:30:44 -0500 From: Dave Jones To: Linus Torvalds Cc: =?iso-8859-1?Q?D=E2niel?= Fraga , Sasha Levin , "Paul E. McKenney" , Linux Kernel Mailing List Subject: Re: frequent lockups in 3.18rc4 Message-ID: <20141202203044.GA26482@redhat.com> Mail-Followup-To: Dave Jones , Linus Torvalds , =?iso-8859-1?Q?D=E2niel?= Fraga , Sasha Levin , "Paul E. McKenney" , Linux Kernel Mailing List References: <20141127225637.GA24019@redhat.com> <547b8a45.6e608c0a.20f9.1002@mx.google.com> <547bbe36.48548c0a.105c.779c@mx.google.com> <20141201191431.GA17385@linux.vnet.ibm.com> <547ccf74.a5198c0a.25de.26d9@mx.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 01, 2014 at 12:36:34PM -0800, Linus Torvalds wrote: > On Mon, Dec 1, 2014 at 12:28 PM, D?niel Fraga wrote: > > > > Hi Paul. Please, I'd like the patch, because without > > preemption, I'm unable to trigger this bug. > > Ok, that's already interesting information. And yes, it would probably > be interesting to see if CONFIG_PREEMPT=y but !CONFIG_TREE_PREEMPT_RCU > then solves it too, to narrow it down to one but not the other.. That combination doesn't seem possible. TREE_PREEMPT_RCU is the only possible choice if PREEMPT=y Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/