From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from e1.ny.us.ibm.com ([32.97.182.141]) by bombadil.infradead.org with esmtps (Exim 4.68 #1 (Red Hat Linux)) id 1KKUn1-0000LW-CH for kexec@lists.infradead.org; Sun, 20 Jul 2008 09:01:11 +0000 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e1.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id m6K917mq022903 for ; Sun, 20 Jul 2008 05:01:07 -0400 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v9.0) with ESMTP id m6K916tK175498 for ; Sun, 20 Jul 2008 05:01:07 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m6K916LW003725 for ; Sun, 20 Jul 2008 05:01:06 -0400 Subject: Re: linux-next: Tree for July 18: warning at kernel/lockdep.c:2068 trace_hardirqs_on_caller From: Dave Hansen In-Reply-To: <19f34abd0807191611y7cabf405iad307ba79591e04f@mail.gmail.com> References: <20080718195352.e562a00f.sfr@canb.auug.org.au> <200807190928.33978.m.kozlowski@tuxland.pl> <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> Date: Sun, 20 Jul 2008 02:01:02 -0700 Message-Id: <1216544462.9311.20.camel@nimitz> Mime-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Vegard Nossum Cc: Stephen Rothwell , Pekka Enberg , Greg KH , kexec , LKML , Mariusz Kozlowski , linux-next@vger.kernel.org, Ingo Molnar , kernel-testers@vger.kernel.org, Bernhard Walle , Vivek Goyal On Sun, 2008-07-20 at 01:11 +0200, Vegard Nossum wrote: > Maybe the firmware memmap code can simply run a little later in the > boot sequence? Heh, I'm catching up on this thread... It is possible that it could run later. But, I do know that there are at least a couple of these tables (on various arches) that we toss out of memory or become unavailable later in boot. I do this this: sysfs: add /sys/firmware/memmap is really being done at the wrong level. I don't, for instance, see *any* reference to memory hotplug in these patches. That's because they're done against firmware structures, and memory hotplug doesn't update firmware structures on the two architectures that I can remember (ppc64 and x86). In other words, kexec using this probably won't work on a memory hotplug machine. Secondly, why don't we just modify the existing /sys/devices/system/memory things to properly export what exec needs? They're already cross-platform *and* they're updated with memory hotplug events. -- Dave _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec