From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753011Ab1JRIWQ (ORCPT ); Tue, 18 Oct 2011 04:22:16 -0400 Received: from a.relay.invitel.net ([62.77.203.3]:60116 "EHLO a.relay.invitel.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750936Ab1JRIWP (ORCPT ); Tue, 18 Oct 2011 04:22:15 -0400 X-Greylist: delayed 614 seconds by postgrey-1.27 at vger.kernel.org; Tue, 18 Oct 2011 04:22:15 EDT Date: Tue, 18 Oct 2011 10:11:59 +0200 From: =?iso-8859-1?B?R+Fib3IgTOlu4XJ0?= To: linux-kernel@vger.kernel.org Subject: barrier-based sync failed - disabling barriers Message-ID: <20111018081159.GA21728@vega.lgb.hu> Reply-To: lgb@lgb.hu MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-Operating-System: vega Linux 2.6.38-12-generic i686 User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi All, I have a kernel log entry I've never seen before: JBD: barrier-based sync failed on cciss!c0d0p3-8 - disabling barriers JBD: barrier-based sync failed on cciss!c0d0p1-8 - disabling barriers Should I worry? Can it be blamed for the poor I/O performance? How can I solve this problem? Even if it doesn't mean too much (what I should worry about), it's a bit annoying (as always) to see odd messages. The ext4 filesystems were created by the installer of an older (ubuntu) distribution, I guess, it can cause problems after the upgrade. Can I convert/modify the filesystem (like with tune2fs) not to have these messages and problem? Thanks a lot in advance for anyone who has some suggestion. Regards, Gábor Lénárt