From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:43791 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754565AbaLMBMb (ORCPT ); Fri, 12 Dec 2014 20:12:31 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1XzbG1-0002Zz-VI for linux-btrfs@vger.kernel.org; Sat, 13 Dec 2014 02:12:29 +0100 Received: from ip68-231-22-224.ph.ph.cox.net ([68.231.22.224]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 13 Dec 2014 02:12:29 +0100 Received: from 1i5t5.duncan by ip68-231-22-224.ph.ph.cox.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 13 Dec 2014 02:12:29 +0100 To: linux-btrfs@vger.kernel.org From: Duncan <1i5t5.duncan@cox.net> Subject: Re: A note on spotting "bugs" [Was: ENOSPC after conversion] Date: Sat, 13 Dec 2014 01:12:15 +0000 (UTC) Message-ID: References: <548A13F7.30904@pobox.com> <548AEDD6.1090904@pobox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Robert White posted on Fri, 12 Dec 2014 05:29:58 -0800 as excerpted: > This still doesnt say _anything_ is wrong with your filesystem except > that it doesn't have enough _raw_ space to create a 2-ish gig extent. What's wrong with the filesystem is that there shouldn't /be/ a need to create a 2-ish gig extent. All btrfs native structures are 1 GiB each or smaller, and the completed-without-error btrfs fi defrag should have eliminated any > 1 GiB structures remaining from the conversion from ext*, such that btrfs balance only has to deal with <= 1 GiB structures. So that balance is having to deal with a 2-ish gig extent at all is indicative of a bug. Balance isn't prepared to have to allocate 2-ish GiB extents in the first place as that's beyond it's design specs. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman