From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 17 Feb 2005 20:43:19 +0000 (GMT) Received: from alg138.algor.co.uk ([IPv6:::ffff:62.254.210.138]:48769 "EHLO mail.linux-mips.net") by linux-mips.org with ESMTP id ; Thu, 17 Feb 2005 20:43:04 +0000 Received: from dea.linux-mips.net (localhost.localdomain [127.0.0.1]) by mail.linux-mips.net (8.13.1/8.13.1) with ESMTP id j1HKauoP010335; Thu, 17 Feb 2005 20:36:56 GMT Received: (from ralf@localhost) by dea.linux-mips.net (8.13.1/8.13.1/Submit) id j1HKasGd010334; Thu, 17 Feb 2005 20:36:54 GMT Date: Thu, 17 Feb 2005 20:36:54 +0000 From: Ralf Baechle To: Rishabh@soc-soft.com Cc: linux-mips@linux-mips.org, mel@skynet.ie, jbglaw@lug-owl.de Subject: Re: HIGHMEM Query Message-ID: <20050217203654.GA9671@linux-mips.org> References: <4BF47D56A0DD2346A1B8D622C5C5902C53FAF5@soc-mail.soc-soft.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BF47D56A0DD2346A1B8D622C5C5902C53FAF5@soc-mail.soc-soft.com> User-Agent: Mutt/1.4.1i Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 7277 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ralf@linux-mips.org Precedence: bulk X-list: linux-mips On Thu, Feb 17, 2005 at 10:40:22AM +0530, Rishabh@soc-soft.com wrote: First, fix your mailer setup, it's littering emails with extra carriage returns. > I have been working on HIGHMEM fixation for 2.4.20 linux MVL kernel for > MIPS architecture. > I am getting DATA BUS ERROR(ADDR: 0xffffd000) exception when loading > (copying the data received from ethernet to the kernel space in FIXADDR > SPACE) "/sbin/init" from TARGET ROOT DIR (through NFS). I figured out > that this is because there is no corresponding page table entry for the > same. That does not make sense. If you don't have a pagetable entry the CPU will take a TLB reload exception. If the entry is invalid, the kernel will die with an oops. A bus error has different causes. Ralf