Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757821AbZGHSpb (ORCPT ); Wed, 8 Jul 2009 14:45:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754947AbZGHSp1 (ORCPT ); Wed, 8 Jul 2009 14:45:27 -0400 Received: from mx2.redhat.com ([66.187.237.31]:33261 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754817AbZGHSp0 (ORCPT ); Wed, 8 Jul 2009 14:45:26 -0400 Date: Wed, 8 Jul 2009 14:44:18 -0400 From: Dave Jones To: Peter Zijlstra Cc: Joao Correia , LKML , =?iso-8859-1?Q?Am=E9rico?= Wang , Frederic Weisbecker , Arjan van de Ven , Catalin Marinas Subject: Re: [PATCH 1/3] Increase lockdep limits: MAX_STACK_TRACE_ENTRIES Message-ID: <20090708184418.GB16090@redhat.com> Mail-Followup-To: Dave Jones , Peter Zijlstra , Joao Correia , LKML , =?iso-8859-1?Q?Am=E9rico?= Wang , Frederic Weisbecker , Arjan van de Ven , Catalin Marinas References: <1246980836.9777.5.camel@twins> <1246981444.9777.11.camel@twins> <1246982101.9777.15.camel@twins> <20090708172248.GB2521@redhat.com> <1247078164.16156.18.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1247078164.16156.18.camel@laptop> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 972 Lines: 24 On Wed, Jul 08, 2009 at 08:36:04PM +0200, Peter Zijlstra wrote: > Looking at a lockdep dump hch gave me I can see that that is certainly > possible, I see tons of very deep callchains. > > /me wonders if we're getting significantly deeper.. > > OK I guess we can raise this one, does doubling work? That would get us > around 29 entries per trace.. > > Also, Dave do these distro init scrips still load every module on the > planet or are we more sensible these days? > module load/unload cycles are really bad for lockdep resources. 34 modules get loaded on the system I saw the trace on. (That's from lsmod after fulling booting up). I'm not aware of any module unloading that happens during bootup. 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/