From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264759AbUEYNgG (ORCPT ); Tue, 25 May 2004 09:36:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264760AbUEYNgG (ORCPT ); Tue, 25 May 2004 09:36:06 -0400 Received: from e34.co.us.ibm.com ([32.97.110.132]:6322 "EHLO e34.co.us.ibm.com") by vger.kernel.org with ESMTP id S264759AbUEYNgE (ORCPT ); Tue, 25 May 2004 09:36:04 -0400 From: Kevin Corry To: linux-kernel@vger.kernel.org Subject: Re: [PATCH/RFC] Lustre VFS patch Date: Tue, 25 May 2004 08:35:24 -0500 User-Agent: KMail/1.6 Cc: Lars Marowsky-Bree , braam , "'Jens Axboe'" , torvalds@osdl.org, akpm@osdl.org, "'Phil Schwan'" References: <20040525064730.GB14792@suse.de> <20040525082305.BAEE93101A0@moraine.clusterfs.com> <20040525105252.GJ22750@marowsky-bree.de> In-Reply-To: <20040525105252.GJ22750@marowsky-bree.de> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200405250835.24110.kevcorry@us.ibm.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 25 May 2004 5:52 am, Lars Marowsky-Bree wrote: > Maybe you could fix this in the test harness / Lustre itself instead and > silently discard the writes internally if told so via an (internal) > option, instead of needing a change deeper down in the IO layer, or use > a DM target which can give you all the failure scenarios you need? > > In particular the last one - a fault-injection DM target - seems like a > very valuable tool for testing in general, but the Lustre-internal > approach may be easier in the long run. See dm-flakey.c in the latest -udm patchset for a fairly simple version of a "fault-injection" target. http://sources.redhat.com/dm/patches.html -- Kevin Corry kevcorry@us.ibm.com http://evms.sourceforge.net/