Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757807Ab0LBOLg (ORCPT ); Thu, 2 Dec 2010 09:11:36 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:45904 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757766Ab0LBOLf (ORCPT ); Thu, 2 Dec 2010 09:11:35 -0500 Date: Thu, 2 Dec 2010 09:11:34 -0500 From: Christoph Hellwig To: Spelic Cc: "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: <20101202141134.GA22012@infradead.org> References: <4CF7A539.1050206@shiftmail.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4CF7A539.1050206@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: 530 Lines: 11 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. -- 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/