Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757768Ab0LBORj (ORCPT ); Thu, 2 Dec 2010 09:17:39 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:50523 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757716Ab0LBORi (ORCPT ); Thu, 2 Dec 2010 09:17:38 -0500 Date: Thu, 2 Dec 2010 09:17:37 -0500 From: Christoph Hellwig To: Spelic Cc: Christoph Hellwig , "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com 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-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4CF7A9C4.2040607@shiftmail.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 786 Lines: 20 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. -- 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/