Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752091Ab3CWVNN (ORCPT ); Sat, 23 Mar 2013 17:13:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:15560 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751992Ab3CWVNM (ORCPT ); Sat, 23 Mar 2013 17:13:12 -0400 Date: Sat, 23 Mar 2013 21:13:08 +0000 From: Alasdair G Kergon To: "Darrick J. Wong" Cc: device-mapper development , Heinz Mauelshagen , linux-kernel@vger.kernel.org, Linus Torvalds , Joe Thornber , Mikulas Patocka Subject: Re: [dm-devel] dm: dm-cache fails to write the cache device in writethrough mode Message-ID: <20130323211308.GC30269@agk-dp.fab.redhat.com> Mail-Followup-To: "Darrick J. Wong" , device-mapper development , Heinz Mauelshagen , linux-kernel@vger.kernel.org, Linus Torvalds , Joe Thornber , Mikulas Patocka References: <20130322201151.GB5357@blackbox.djwong.org> <20130322223425.GA5638@redhat.com> <20130322231600.GD5357@blackbox.djwong.org> <20130323032715.GA7692@redhat.com> <20130323051549.GE5357@blackbox.djwong.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130323051549.GE5357@blackbox.djwong.org> Organization: Red Hat UK Ltd. Registered in England and Wales, number 03798903. Registered Office: 64 Baker Street, 4th floor, London, W1U 7DF. User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 599 Lines: 15 On Fri, Mar 22, 2013 at 10:15:49PM -0700, Darrick J. Wong wrote: > Interesting ... if I set up this: > # echo "0 67108864 linear /dev/sda 0" | dmsetup create origin > And then repeat the test, but using /dev/mapper/origin as the origin instead > of /dev/sda, the problem goes away. So that looks like an easy and correct workaround for now. Alasdair -- 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/