From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758132Ab1EZRdA (ORCPT ); Thu, 26 May 2011 13:33:00 -0400 Received: from one.firstfloor.org ([213.235.205.2]:52961 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754225Ab1EZRc7 (ORCPT ); Thu, 26 May 2011 13:32:59 -0400 Date: Thu, 26 May 2011 19:32:57 +0200 From: Andi Kleen To: "K.Prasad" Cc: Linux Kernel Mailing List , Andi Kleen , "Luck, Tony" , Vivek Goyal , kexec@lists.infradead.org, "Eric W. Biederman" , anderson@redhat.com Subject: Re: [RFC Patch 5/6] slimdump: Capture slimdump for fatal MCE generated crashes Message-ID: <20110526173257.GC4065@one.firstfloor.org> References: <20110526170722.GB23266@in.ibm.com> <20110526172305.GA18295@in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110526172305.GA18295@in.ibm.com> User-Agent: Mutt/1.4.2.2i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 26, 2011 at 10:53:05PM +0530, K.Prasad wrote: > > slimdump: Capture slimdump for fatal MCE generated crashes > > System crashes resulting from fatal hardware errors (such as MCE) don't need > all the contents from crashing-kernel's memory. Generate a new 'slimdump' that > retains only essential information while discarding the old memory. While this is a good idea, note there may be still poisoned lines in memory that haven't resulted in a machine check yet, but could still be fatal when read after a full crash dump for some other reason. So you still need http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=fe61906edce9e70d02481a77a617ba1397573dce and http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=cb58f049ae6709ddbab71be199390dc6852018cd in addition. -Andi From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from one.firstfloor.org ([213.235.205.2]) by casper.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QPeRG-0002uh-Fy for kexec@lists.infradead.org; Thu, 26 May 2011 17:33:39 +0000 Date: Thu, 26 May 2011 19:32:57 +0200 From: Andi Kleen Subject: Re: [RFC Patch 5/6] slimdump: Capture slimdump for fatal MCE generated crashes Message-ID: <20110526173257.GC4065@one.firstfloor.org> References: <20110526170722.GB23266@in.ibm.com> <20110526172305.GA18295@in.ibm.com> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <20110526172305.GA18295@in.ibm.com> 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=twosheds.infradead.org@lists.infradead.org To: "K.Prasad" Cc: "Luck, Tony" , kexec@lists.infradead.org, Linux Kernel Mailing List , Andi Kleen , anderson@redhat.com, "Eric W. Biederman" , Vivek Goyal On Thu, May 26, 2011 at 10:53:05PM +0530, K.Prasad wrote: > > slimdump: Capture slimdump for fatal MCE generated crashes > > System crashes resulting from fatal hardware errors (such as MCE) don't need > all the contents from crashing-kernel's memory. Generate a new 'slimdump' that > retains only essential information while discarding the old memory. While this is a good idea, note there may be still poisoned lines in memory that haven't resulted in a machine check yet, but could still be fatal when read after a full crash dump for some other reason. So you still need http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=fe61906edce9e70d02481a77a617ba1397573dce and http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=cb58f049ae6709ddbab71be199390dc6852018cd in addition. -Andi _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec