From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from caibbdcaabie.dreamhost.com ([208.113.200.184]:39227 "EHLO homiemail-a52.g.dreamhost.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751770AbaBJPed (ORCPT ); Mon, 10 Feb 2014 10:34:33 -0500 Received: from homiemail-a52.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a52.g.dreamhost.com (Postfix) with ESMTP id B0D026B82F6 for ; Mon, 10 Feb 2014 07:34:32 -0800 (PST) Received: from [192.168.1.9] (unknown [50.46.251.200]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: john@navitsky.org) by homiemail-a52.g.dreamhost.com (Postfix) with ESMTPSA id 94A3A6B82F3 for ; Mon, 10 Feb 2014 07:34:32 -0800 (PST) Message-ID: <52F8F1C4.5070701@navitsky.org> Date: Mon, 10 Feb 2014 07:35:32 -0800 From: John Navitsky MIME-Version: 1.0 To: linux-btrfs@vger.kernel.org Subject: Re: system stuck with flush-btrfs-4 at 100% after filesystem resize References: <52F67926.7060209@navitsky.org> In-Reply-To: <52F67926.7060209@navitsky.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: As a follow-up, at some point over the weekend things did finish on their own: romulus:/vms/johnn-sles11sp3 # df -h /vms Filesystem Size Used Avail Use% Mounted on /dev/dm-4 2.6T 1.6T 1.1T 60% /vms romulus:/vms/johnn-sles11sp3 # I'd still be interested in any comments about what was going on or suggestions. Thanks, -john On 2/8/2014 10:36 AM, John Navitsky wrote: > Hello, > > I have a large file system that has been growing. We've resized it a > couple of times with the following approach: > > lvextend -L +800G /dev/raid/virtual_machines > btrfs filesystem resize +800G /vms > > I think the FS started out at 200G, we increased it by 200GB a time or > two, then by 800GB and everything worked fine. > > The filesystem hosts a number of virtual machines so the file system is > in use, although the VMs individually tend not to be overly active. > > VMs tend to be in subvolumes, and some of those subvolumes have snapshots. > > This time, I increased it by another 800GB, and it it has hung for many > hours (over night) with flush-btrfs-4 near 100% cpu all that time. > > I'm not clear at this point that it will finish or where to go from here. > > Any pointers would be much appreciated. > > Thanks, > > -john (newbie to BTRFS)