From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.virtall.com ([178.63.195.102]:34439 "EHLO mail.virtall.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933600AbcI0DKq (ORCPT ); Mon, 26 Sep 2016 23:10:46 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Date: Tue, 27 Sep 2016 12:10:37 +0900 From: Tomasz Chmielewski To: Chris Murphy Cc: linux-btrfs , chris@colorremedies.com Subject: Re: how to understand "btrfs fi show" output? "No space left" issues In-Reply-To: References: <566e9000fe30d5b8e0d7e73ebe1d44a0@admin.virtall.com> Message-ID: <8f88272e6c5e69563d6734f411c680ae@admin.virtall.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 2016-09-21 11:51, Chris Murphy wrote: > So if it happens again, first capture the above two bits of > information, and then if you feel like testing kernel 4.8rc7 do that. > It has a massive pile of enoscp related rework and I bet Josef would > like to know if the problem reproduces with that kernel. As in, just > change kernels, don't try to fix it with balance first. Looks like 4.8 helped (running 4.8rc8 now). With 4.7, after balance, the "used" value continued to grow, to around 300 GB, although used space shown by "df" was more or less constant at 130-140 GB: # btrfs fi show /var/lib/lxd Label: 'btrfs' uuid: f5f30428-ec5b-4497-82de-6e20065e6f61 Total devices 2 FS bytes used 135.40GiB <--------- was growing devid 1 size 423.13GiB used 277.03GiB path /dev/sda3 devid 2 size 423.13GiB used 277.03GiB path /dev/sdb3 After upgrading to 4.8rc8, "used" value dropped, so hopefully it's fixed now. Tomasz Chmielewski https://lxadm.com