From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754733AbZDQEfk (ORCPT ); Fri, 17 Apr 2009 00:35:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751044AbZDQEfc (ORCPT ); Fri, 17 Apr 2009 00:35:32 -0400 Received: from main.gmane.org ([80.91.229.2]:55640 "EHLO ciao.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750989AbZDQEfb (ORCPT ); Fri, 17 Apr 2009 00:35:31 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Robert Hancock Subject: Barriers on LVM? Date: Thu, 16 Apr 2009 22:35:08 -0600 Message-ID: <49E806FC.80000@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@ger.gmane.org Cc: dm-devel@redhat.com X-Gmane-NNTP-Posting-Host: s0106000c41bb86e1.ss.shawcable.net User-Agent: Thunderbird 2.0.0.21 (X11/20090320) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I thought somebody mentioned that LVM now had barrier support for single-disk configurations in 2.6.29, but my dmesg seems to say otherwise. This is essentially a default Fedora disk layout with root and swap partitions inside an LVM on a single SATA drive with 2.6.29.1: EXT4-fs: barriers enabled ... JBD: barrier-based sync failed on dm-0:8 - disabling barriers Is proper LVM barrier support coming any time soon? It seems a bit brutal that the default disk layout on many systems (and almost all Fedora ones, which will default to ext4 in Fedora 11) can't support whatever data integrity needs ext4 is using them for..