From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:56516 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752500AbbGAMfh (ORCPT ); Wed, 1 Jul 2015 08:35:37 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZAHEh-0003mE-Ai for linux-btrfs@vger.kernel.org; Wed, 01 Jul 2015 14:35:31 +0200 Received: from barriere.frankfurter-softwarefabrik.de ([217.11.197.1]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 01 Jul 2015 14:35:31 +0200 Received: from lvml by barriere.frankfurter-softwarefabrik.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 01 Jul 2015 14:35:31 +0200 To: linux-btrfs@vger.kernel.org From: Lutz Vieweg Subject: Re: WARNING: at /fs/btrfs/extent-tree.c:4029 btrfs_free_reserved_data_space Date: Wed, 01 Jul 2015 14:35:24 +0200 Message-ID: References: <6617728.KSCQs1dauk@o3-3> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed In-Reply-To: Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 06/30/2015 11:10 AM, David Weber wrote: > I use Btrfs with regular snapshots on my workstation with Virtualbox since > years. Running filefrag on the image doesn't complete after hours but the > IO of the VM is still "fast enough". But the definition of "fast enough" > can vary heavily. How do you backup the VM images? If filefrag takes hours to complete, I'd assume that attempting a sequential read of the whole file (from a backup software) takes just as long. > If it becomes to slow I will try a btrfs fi deframent or just recreate the > image with a no reflink copy. Chances are this will also take hours. Regards, Lutz Vieweg