From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from out01.mta.xmission.com ([166.70.13.231]) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1RAfU7-0003sB-V1 for kexec@lists.infradead.org; Mon, 03 Oct 2011 10:11:00 +0000 From: ebiederm@xmission.com (Eric W. Biederman) References: <20111003070735.GJ2223@in.ibm.com> <20111003073203.GA22694@in.ibm.com> Date: Mon, 03 Oct 2011 03:10:43 -0700 In-Reply-To: <20111003073203.GA22694@in.ibm.com> (K. Prasad's message of "Mon, 3 Oct 2011 13:02:03 +0530") Message-ID: MIME-Version: 1.0 Subject: Re: [Patch 1/4][kernel][slimdump] Add new elf-note of type NT_NOCOREDUMP to capture slimdump 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: prasad@linux.vnet.ibm.com Cc: oomichi@mxs.nes.nec.co.jp, "Luck, Tony" , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, tachibana@mxm.nes.nec.co.jp, Andi Kleen , anderson@redhat.com, Vivek Goyal , crash-utility@redhat.com "K.Prasad" writes: > There are certain types of crashes induced by faulty hardware in which > capturing crashing kernel's memory (through kdump) makes no sense (or sometimes > dangerous). > > A case in point, is unrecoverable memory errors (resulting in fatal machine > check exceptions) in which reading from the faulty memory location from the > kexec'ed kernel will cause double fault and system reset (leaving no > information for the user). It does make plenty of sense, and I capture the all of the time. It totally doesn't make sense to do this in the kernel when we can filter this from userspace just fine. Nacked-by: "Eric W. Biederman" I thought we already had this discussion. Why is this silliness coming back? I especially dislike the notion of hardcoding policy in the kernel like this. Eric _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec