From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755220AbZEYIFf (ORCPT ); Mon, 25 May 2009 04:05:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752106AbZEYIFV (ORCPT ); Mon, 25 May 2009 04:05:21 -0400 Received: from mail.tigress.co.uk ([195.172.168.163]:35049 "EHLO intgat.tigress.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750969AbZEYIFT (ORCPT ); Mon, 25 May 2009 04:05:19 -0400 X-Greylist: delayed 937 seconds by postgrey-1.27 at vger.kernel.org; Mon, 25 May 2009 04:05:18 EDT From: Ron Yorston Message-Id: <200905250748.n4P7mbQS024844@tiffany.internal.tigress.co.uk> Date: Mon, 25 May 2009 08:48:37 +0100 To: tytso@thunk.org, thomas@glanzmann.de Cc: linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org Subject: Re: zero out blocks of freed user data for operation a virtual machine environment References: <20090524170045.GC24753@cip.informatik.uni-erlangen.de> In-Reply-To: <20090524170045.GC24753@cip.informatik.uni-erlangen.de> User-Agent: Heirloom mailx 12.0 3/4/06 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I've written a tool to zero freed blocks in ext2/ext3 filesystems, as well as a (half-baked) kernel patch. Details here: http://intgat.tigress.co.uk/rmy/uml/sparsify.html Ron