From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.flw5.de ([37.187.16.190]:53944 "EHLO mail.flw5.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750853AbcFXJdV (ORCPT ); Fri, 24 Jun 2016 05:33:21 -0400 Received: from [2001:470:78a0:fd:c642:196e:8260:1787] (helo=abraxas.flw5.de) by mail.flw5.de with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.87) id 1bGN7F-00005O-UH for linux-btrfs@vger.kernel.org; Fri, 24 Jun 2016 11:09:34 +0200 Received: from stefan by abraxas.flw5.de with local (Exim 4.87) (envelope-from ) id 1bGN79-0005xK-Lk for linux-btrfs@vger.kernel.org; Fri, 24 Jun 2016 11:09:27 +0200 Date: Fri, 24 Jun 2016 11:09:27 +0200 From: Stefan Schweizer To: linux-btrfs@vger.kernel.org Subject: btrfs-convert: Unable to find block group for 0 Message-ID: <20160624090927.GD31030@abraxas.flw5.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-btrfs-owner@vger.kernel.org List-ID: While trying to convert a ext4 filesystem to btrfs with the new btrfs-convert from btrfs-progs-4.6 I got the following error: create btrfs filesystem: blocksize: 4096 nodesize: 16384 features: extref, skinny-metadata (default) creating ext2 image file. Unable to find block group for 0 extent-tree.c:289: find_search_start: Assertion `1` failed. ./btrfs-convert(btrfs_reserve_extent+0x8e9)[0x41979d] ./btrfs-convert(btrfs_alloc_free_block+0x50)[0x419b27] ./btrfs-convert[0x40b8d8] ./btrfs-convert(btrfs_search_slot+0x13f7)[0x40d9d6] ./btrfs-convert(btrfs_csum_file_block+0x3b5)[0x41f144] ./btrfs-convert[0x4387b1] ./btrfs-convert(main+0x2013)[0x43d180] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fca6bb895f0] ./btrfs-convert(_start+0x29)[0x4082b9] Before I already tried btrfs-convert from btrfs-progs-4.5.2 which I accidentally aborted but until then seemed to run fine.