Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750767AbVJROyX (ORCPT ); Tue, 18 Oct 2005 10:54:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750783AbVJROyX (ORCPT ); Tue, 18 Oct 2005 10:54:23 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:35543 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1750767AbVJROyW (ORCPT ); Tue, 18 Oct 2005 10:54:22 -0400 Message-ID: <43550C9A.9070306@de.ibm.com> Date: Tue, 18 Oct 2005 16:54:18 +0200 From: Carsten Otte Reply-To: carsteno@de.ibm.com Organization: IBM Deutschland User-Agent: Debian Thunderbird 1.0.2 (X11/20050602) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andrew Morton CC: OBATA Noboru , hyoshiok@miraclelinux.com, linux-kernel@vger.kernel.org Subject: Re: Linux Kernel Dump Summit 2005 References: <20050921.205550.927509530.hyoshiok@miraclelinux.com> <20051006.211718.74749573.noboru.obata.ar@hitachi.com> <20051010174931.223310de.akpm@osdl.org> In-Reply-To: <20051010174931.223310de.akpm@osdl.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1338 Lines: 27 Andrew Morton wrote: > I was rather expecting that the various groups which are interested in > crash dumping would converge around kdump once it was merged. But it seems > that this is not the case and that work continues on other strategies. > > Is that a correct impression? If so, what shortcoming(s) in kdump are > causing people to be reluctant to use it? On 390, we have standalone dump. That is a tool you can install on a disk with zipl (like lilo) and that you boot when your server has crashed. Newer machines also have a hardware feature built-in that does this from the service element (that is a laptop computer mounted to the big box). When running on z/VM, there is a command you can enter on z/VM's console which causes z/VM to create a dump of Linux' memory. Different from kdump we can even take a dump if our system is so badly corrupted that you don't even get a panic message. As far as I know, kdump would require to reserve memory for the extra kernel prior to crash, which is not the case with our soloutions. -- Carsten Otte IBM Linux technology center ARCH=s390 - 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/