Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755560AbYGUPAT (ORCPT ); Mon, 21 Jul 2008 11:00:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755166AbYGUO77 (ORCPT ); Mon, 21 Jul 2008 10:59:59 -0400 Received: from mx2.suse.de ([195.135.220.15]:40364 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751565AbYGUO76 (ORCPT ); Mon, 21 Jul 2008 10:59:58 -0400 Date: Mon, 21 Jul 2008 17:00:37 +0200 From: Bernhard Walle To: Vivek Goyal Cc: Stephen Rothwell , Vegard Nossum , Greg KH , kexec , LKML , Dave Hansen , Mariusz Kozlowski , Pekka Enberg , linux-next@vger.kernel.org, Ingo Molnar , kernel-testers@vger.kernel.org Subject: Re: linux-next: Tree for July 18: warning at kernel/lockdep.c:2068 trace_hardirqs_on_caller Message-ID: <20080721170037.1a0046b1@halley.suse.de> In-Reply-To: <20080721133937.GC4451@redhat.com> References: <19f34abd0807190255x304173d4wf2bfabb2d5bce511@mail.gmail.com> <19f34abd0807190559y2fe5ebf9h7095793e82de3122@mail.gmail.com> <20080719221723.GB5578@suse.de> <19f34abd0807191527u61c5ed61kffe2279c8d46915d@mail.gmail.com> <19f34abd0807191544nfd73be5nf7dde4b61992a7e8@mail.gmail.com> <20080719225817.GA6264@suse.de> <19f34abd0807191611y7cabf405iad307ba79591e04f@mail.gmail.com> <1216544462.9311.20.camel@nimitz> <20080721131721.GB4451@redhat.com> <20080721152539.3d8684f9@halley.suse.de> <20080721133937.GC4451@redhat.com> Organization: SUSE Linux Products GmbH X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.9; x86_64-suse-linux-gnu) X-Face: ,G!z)dEOMkc[Cu+sF64,T9^5r3b>/}#HBRL%D^j@\SZbr'Itl7q@1<*dgB?A7(_leO1Tc4^ D*WfvfwKcz;,@E^y+pNP%86n8o<&g-vToCXW:r>Y$jxY,`KT?{H!07=2|Jdt?0ba^C-Tnx50vIV8It vi&Sicl:sj`k2`y)E;ECFi;i7W-?t3%\kD*));q)+%-pQd^.r'W}oBBx=+.~Gu}&F;lS7.a-m>Rv"w pe`D'OV^?HJd$-)7<2T[naDPl6+bAj'+UYd]u]B^'.LYK$2jS Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1609 Lines: 41 * Vivek Goyal [2008-07-21 09:39]: > > On Mon, Jul 21, 2008 at 03:25:39PM +0200, Bernhard Walle wrote: > > * Vivek Goyal [2008-07-21 09:17]: > > > > > > Is /proc/iomem updated upon memory hotplug event. > > > > Yes. I just checked that (yesterday). > > > > I think it would make sense to extend /sys/firmware/memmap on > > hot-plugging. Just because on reboot, the firmware will see that > > memory, too, and report it. However, we need a way to discriminate the > > originally firmware-provided memory map with later added memory. I'm > > not sure how that can be done, I have to think about it. > > Probably use another type of RAM identifier (System RAM (hotplug)). > > But the point is, if /sys/devices/system/memory also represents all > the physical memory present in the system then it might be not be > justified to create another similar interface. (Until and unless there > is something unique about /sys/firmware/memmap). But I don't see anything like a physical address there: /sys/devices/system/memory/memory2: -r--r--r-- 1 root root 4096 2008-07-21 15:45 phys_device -r--r--r-- 1 root root 4096 2008-07-21 15:45 phys_index -rw-r--r-- 1 root root 4096 2008-07-21 15:45 state (on a PPC64 machine where SUSE kernel has that interface enabled by default). Bernhard -- Bernhard Walle, SUSE LINUX Products GmbH, Architecture Development -- 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/