Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758379Ab0FJSaL (ORCPT ); Thu, 10 Jun 2010 14:30:11 -0400 Received: from zcars04e.nortel.com ([47.129.242.56]:44554 "EHLO zcars04e.nortel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751902Ab0FJSaJ (ORCPT ); Thu, 10 Jun 2010 14:30:09 -0400 Message-ID: <4C112E7B.1040101@nortel.com> Date: Thu, 10 Jun 2010 12:27:07 -0600 From: "Chris Friesen" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-2.fc11 Thunderbird/3.0.4 MIME-Version: 1.0 To: Brian Gordon CC: linux-kernel@vger.kernel.org Subject: Re: Aerospace and linux References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 10 Jun 2010 18:30:01.0648 (UTC) FILETIME=[F032FB00:01CB08CA] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1694 Lines: 39 On 06/10/2010 11:29 AM, Brian Gordon wrote: > When these SEU can be detected some action may be taken to improve > the behaviour of the system (log a fault and reset in order to > refresh things from scratch?). So the first question becomes how to > detect an SEU. I do work in telco stuff. We use ECC RAM, turn on ECC/parity on the various buses, enable error-checking in the hardware, etc. At higher abstraction levels you can checksum the data being stored and validate it when you access it. Some of the errors are "soft" and can be corrected, others are "hard" and uncorrectable. If you get enough "soft" errors in a short enough time it may be desirable to treat it as a "hard" error and reset. > Thank you to anyone for any pointers on where I can look to learn > more about detecting SEU in linux. You might start by taking a look at the "edac" code in the kernel. Linux in general doesn't normally enable all the fault detection code, so you may need to start looking at datasheets. Chris -- The author works for GENBAND Corporation (GENBAND) who is solely responsible for this email and its contents. All enquiries regarding this email should be addressed to GENBAND. Nortel has provided the use of the nortel.com domain to GENBAND in connection with this email solely for the purpose of connectivity and Nortel Networks Inc. has no liability for the email or its contents. GENBAND's web site is http://www.genband.com -- 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/