From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754240Ab1HQVG3 (ORCPT ); Wed, 17 Aug 2011 17:06:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:12064 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754017Ab1HQVG1 (ORCPT ); Wed, 17 Aug 2011 17:06:27 -0400 Date: Wed, 17 Aug 2011 17:05:55 -0400 From: Vivek Goyal To: Michael Holzheu Cc: ebiederm@xmission.com, mahesh@linux.vnet.ibm.com, hbabu@us.ibm.com, oomichi@mxs.nes.nec.co.jp, horms@verge.net.au, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: Re: [patch v3 3/8] kdump: Add size to elfcorehdr kernel parameter Message-ID: <20110817210554.GD14813@redhat.com> References: <20110812134849.748973593@linux.vnet.ibm.com> <20110812134907.325789470@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110812134907.325789470@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 12, 2011 at 03:48:52PM +0200, Michael Holzheu wrote: > From: Michael Holzheu > > Currently only the address of the pre-allocated ELF header is passed with > the elfcorehdr= kernel parameter. In order to reserve memory for the header > in the 2nd kernel also the size is required. Current kdump architecture > backends use different methods to do that, e.g. x86 uses the memmap= kernel > parameter. On s390 there is no easy way to transfer this information. > Therefore the elfcorehdr kernel parameter is extended to also pass the size. > This now can also be used as standard mechanism by all future kdump > architecture backends. Michael, This version looks much better. A quick question. Who parses this elfcorehdr= parameter in s390 and how do we make sure these headers are not overwritten. Thanks Vivek