From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:33212 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751760Ab3KXXDB (ORCPT ); Sun, 24 Nov 2013 18:03:01 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Vkihf-0000TH-SX for linux-btrfs@vger.kernel.org; Mon, 25 Nov 2013 00:02:59 +0100 Received: from cpc21-stap10-2-0-cust974.12-2.cable.virginm.net ([86.0.163.207]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 25 Nov 2013 00:02:59 +0100 Received: from m_btrfs by cpc21-stap10-2-0-cust974.12-2.cable.virginm.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 25 Nov 2013 00:02:59 +0100 To: linux-btrfs@vger.kernel.org From: Martin Subject: Re: Clean crash... (USB memory sticks mount) Date: Sun, 24 Nov 2013 23:02:47 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 In-Reply-To: Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 24/11/13 20:50, Kai Krakow wrote: > something about device mapper and write barriers not working correctly which > are needed for btrfs being able to rely on transactions working correctly. Re USB memory sticks: I've found write barriers not to work for USB memory sticks (for at least the ones I have tried) for ext4 and btrfs. You must mount with the "nobarrier" option... Regards, Martin