Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756394Ab0FDOtk (ORCPT ); Fri, 4 Jun 2010 10:49:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57500 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756031Ab0FDOtj (ORCPT ); Fri, 4 Jun 2010 10:49:39 -0400 Date: Fri, 4 Jun 2010 10:49:21 -0400 From: Vivek Goyal To: =?iso-8859-1?Q?Am=E9rico?= Wang Cc: Andi Kleen , Vitaly Mayatskikh , linux-kernel@vger.kernel.org, Andrew Morton , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Randy Dunlap Subject: Re: [PATCH 0/5] kdump: extract log buffer and registers from vmcore on NMI button pressing Message-ID: <20100604144921.GG4111@redhat.com> References: <1275464359-1566-1-git-send-email-v.mayatskih@gmail.com> <20100602151611.GA3174@redhat.com> <87iq60a3rh.wl%vmayatsk@redhat.com> <87d3w8xy3q.fsf@basil.nowhere.org> <874ohkuwhs.wl%vmayatsk@redhat.com> <20100603151347.GC4166@basil.fritz.box> <20100604094936.GA5975@cr0.nay.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20100604094936.GA5975@cr0.nay.redhat.com> 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: 1079 Lines: 31 On Fri, Jun 04, 2010 at 05:49:36PM +0800, Am?rico Wang wrote: > On Thu, Jun 03, 2010 at 05:13:47PM +0200, Andi Kleen wrote: > >> > NMI would be only needed if the crash kernel is completely > >> > hosed too. > >> > >> That's the case. > > > >You're saying it booted but is hosed after boot? > > > >That seems like a very obscure case. Is that really common? > > > > Actually, I met two of this kind of cases recently. > > One was stucked in early_idt_hander() during booting the second kernel, > the other one is even worse, I even can't find where it hangs. If you can't initialize the idt, will NMI work? I think we need to fix those cases instead of creating another NMI handler. To handle cases like network is not up or there is not sufficient space on disk, a user space utility in kdump initrd should work. Thanks Vivek -- 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/