Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262194AbVD2FHi (ORCPT ); Fri, 29 Apr 2005 01:07:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262345AbVD2FHi (ORCPT ); Fri, 29 Apr 2005 01:07:38 -0400 Received: from e35.co.us.ibm.com ([32.97.110.133]:38651 "EHLO e35.co.us.ibm.com") by vger.kernel.org with ESMTP id S262194AbVD2FHc (ORCPT ); Fri, 29 Apr 2005 01:07:32 -0400 Date: Fri, 29 Apr 2005 10:37:29 +0530 From: Vivek Goyal To: "Randy.Dunlap" Cc: vgoyal@in.ibm.com, akpm@osdl.org, sharyathi@in.ibm.com, fastboot@lists.osdl.org, ebiederm@xmission.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Kdump docs. Message-ID: <20050429050729.GB3636@in.ibm.com> Reply-To: vgoyal@in.ibm.com References: <1114227003.4269c13be5f8b@imap.linux.ibm.com> <20050425160925.3a48adc5.rddunlap@osdl.org> <20050426085448.GB4234@in.ibm.com> <20050427122312.358f5bd6.rddunlap@osdl.org> <20050428114416.GA5706@in.ibm.com> <20050428091119.73568208.rddunlap@osdl.org> <20050428200845.5211ec37.rddunlap@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050428200845.5211ec37.rddunlap@osdl.org> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1563 Lines: 38 Hi Randy, > + A) First kernel: > + a) Enable "kexec system call" feature (in Processor type and features). > + CONFIG_KEXEC=y > + b) This kernel's physical load address should be the default value of > + 0x100000 (0x100000, 1 MB) (in Processor type and features). > + CONFIG_PHYSICAL_START=0x100000 > + c) Enable "sysfs file system support" (in Pseudo filesystems). > + CONFIG_SYSFS=y > + d) Boot into first kernel with the command line parameter "crashkernel=Y@X". > + Use appropriate values for X and Y. Y denotes how much memory to reserve > + for the second kernel, and X denotes at what physical address the reserved > + memory section starts. For example: "crashkernel=64M@16M". > + > + B) Second kernel: > + a) Enable "kernel crash dumps" feature (in Processor type and features). > + CONFIG_CRASH_DUMP=y > + b) Specify a suitable value for "Physical address where the kernel is > + loaded" (in Processor type and features). Typically this value > + should be same as X (See option b) above, e.g., 16 MB or 0x1000000. Should above line be as follows. "should be same as X (See option d) above." This will make clear what is X and what should be the new value of CONFIG_PHYSICAL_START. Thanks for testing out and providing a clearer documentation. 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/