From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.palepurple.co.uk ([89.16.183.188]:45159 "EHLO mail.palepurple.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751614AbcAENEa (ORCPT ); Tue, 5 Jan 2016 08:04:30 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.palepurple.co.uk (Postfix) with ESMTP id 3B5458334 for ; Tue, 5 Jan 2016 13:04:29 +0000 (GMT) Received: from mail.palepurple.co.uk ([127.0.0.1]) by localhost (mail.palepurple.co.uk [127.0.0.50]) (amavisd-new, port 10024) with ESMTP id Z0uk71vq9Hiq for ; Tue, 5 Jan 2016 13:04:29 +0000 (GMT) Received: from [172.30.33.200] (host81-133-46-190.in-addr.btopenworld.com [81.133.46.190]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: david@palepurple.co.uk) by mail.palepurple.co.uk (Postfix) with ESMTPSA id 00E0D8111 for ; Tue, 5 Jan 2016 13:04:28 +0000 (GMT) To: "linux-btrfs@vger.kernel.org" From: David Goodwin Subject: device removal seems to be very slow (kernel 4.1.15) Message-ID: <568BBF5D.40304@codepoets.co.uk> Date: Tue, 5 Jan 2016 13:04:29 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: Using btrfs progs 4.3.1 on a Vanilla kernel.org 4.1.15 kernel. time btrfs device delete /dev/xvdh /backups real 13936m56.796s user 0m0.000s sys 1351m48.280s (which is about 9 days). Where : /dev/xvdh was 120gb in size. /backups is a single / "raid 0" volume that now looks like : Label: 'BACKUP_BTRFS_SNAPS' uuid: 6ee08c31-f310-4890-8424-b88bb77186ed Total devices 3 FS bytes used 301.09GiB devid 1 size 100.00GiB used 90.00GiB path /dev/xvdg devid 3 size 220.00GiB used 196.06GiB path /dev/xvdi devid 4 size 221.00GiB used 59.06GiB path /dev/xvdj There are about 400 snapshots on it. thanks David.