From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from out02.mta.xmission.com ([166.70.13.232]) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1NS1qd-0007rw-82 for kexec@lists.infradead.org; Tue, 05 Jan 2010 05:20:55 +0000 Subject: Re: Linux kernel crash dumps for ARM References: From: ebiederm@xmission.com (Eric W. Biederman) Date: Mon, 04 Jan 2010 21:20:23 -0800 In-Reply-To: (Venkappa Mala's message of "Tue\, 5 Jan 2010 10\:19\:31 +0530") Message-ID: 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: Venkappa Mala Cc: "rmk+lkml@arm.linux.org.uk" , Kexec Mailing List , linux-kernel@vger.kernel.org Venkappa Mala writes: I have added the kexec list and corrected the lkml addresses. In principle it should not be too hard to use kexec on panic support on arm. I don't do any arm development so I don't have a clue what the status of the support is on arm. > Hi, > > With respect to "Linux kernel crash dumps for ARM", i have some doubts which are described as below. > > If the machine has crashed so badly that you cannot enter commands or > the disk is not available then you have three options :- > > (1) Hand copy the text from the screen > > (2) capture crash logs using Minicom. > > (3) save the crash data to a floppy disk or video rom or a swap partition or reserved memory. > > In the above three options, 1 & 2 are known and works as well. > > Regarding 3 option, > ---------------------------- > i would like to support for ARM11. > > As far as i know, the supported linux kernel crash dumps are > "lkcd, netdump,diskdump, mini kernel dump and kdump/kexec". > These are supported for x86 and PowerPC architectures with some constrains. > > i have some queries with respect to ARM supports, these are > > 1.) kexec is supported in latest kernels > example: 2.6.29 kernel > File: arch/arm/kernel/machine_kexec.c > > - is this working well or is there any constraints? > > 2) As per kexec supports, kexec-tool is required and this allows you to load directly > to a new kernel from the currently running one > > As from my side, i am not able to find arm implementation support in kexec-tools/crash sources. > > - is kexce-tool supported for ARM or not? > > 3) In lkcd, netdump,diskdump, mini kernel dump and kdump/kexec tools, > > - which is the best choice for ARM or are there any best crash dump tool for ARM? > > Please clarify my queries. > > Best Regards, > Venkappa Eric _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec