From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2EFsZ9022289 for ; Thu, 2 Dec 2010 08:15:55 -0600 Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DA7AD1E94327 for ; Thu, 2 Dec 2010 06:17:38 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id OjZJoT8GMQJtNhkQ for ; Thu, 02 Dec 2010 06:17:38 -0800 (PST) Date: Thu, 2 Dec 2010 09:17:37 -0500 From: Christoph Hellwig Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101202141737.GA29799@infradead.org> References: <4CF7A539.1050206@shiftmail.org> <20101202141134.GA22012@infradead.org> <4CF7A9C4.2040607@shiftmail.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4CF7A9C4.2040607@shiftmail.org> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Spelic Cc: Christoph Hellwig , linux-lvm@redhat.com, "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com On Thu, Dec 02, 2010 at 03:14:28PM +0100, Spelic wrote: > On 12/02/2010 03:11 PM, Christoph Hellwig wrote: > >I'm pretty sure you have CONFIG_DEBUG_BLOCK_EXT_DEVT enabled. This > >option must never be enabled, as it causes block devices to be > >randomly renumered. Together with the ramdisk driver overloading > >the BLKFLSBUF ioctl to discard all data it guarantees you to get > >data loss like yours. > > Nope... > > # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set Hmm, I suspect dm-linear's dumb forwarding of ioctls has the same effect. _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs