From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:20563 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750988AbaJROFB (ORCPT ); Sat, 18 Oct 2014 10:05:01 -0400 Message-ID: <54427383.6050104@fb.com> Date: Sat, 18 Oct 2014 10:04:51 -0400 From: Josef Bacik MIME-Version: 1.0 To: Petr Janecek CC: , Subject: Re: Poll: time to switch skinny-metadata on by default? References: <20141017123036.GA8052@atrey.karlin.mff.cuni.cz> <54415F1C.1060902@fb.com> <20141018112121.GB17403@atrey.karlin.mff.cuni.cz> In-Reply-To: <20141018112121.GB17403@atrey.karlin.mff.cuni.cz> Content-Type: text/plain; charset="windows-1252"; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 10/18/2014 07:21 AM, Petr Janecek wrote: > Hello, > >>> so far I haven't succeeded running btrfs balance on a large >>> skinny-metadata fs -- segfault, kernel bug, reproducible. No such >>> problems on ^skinny-metadata fs (same disks, same data). Tried both >>> several times on 3.17. More info in comments 10,14 in >>> https://bugzilla.kernel.org/show_bug.cgi?id=64961 >> >> I can't reproduce this, how big is your home directory, and are you >> still seeing corruptions after just rsyncing to a clean fs? Thanks, > > as I wrote in comment 10, it has improved since year ago when I > reported it: I see no corruption at all, neither after rsync, nor after > balance crash: btrfs check doesn't find anything wrong, files look ok. > The only problem is that after adding a disk the balance segfaults on a > kernel bug and the fs gets stuck. When I run balance again after > reboot, it makes only a very small progress and crashes again the same > way. > > There are some 2.5TB of data in 7.5M files on that fs. And couple > dozen ro snapshots -- I'm testing 3.17 + revert of 9c3b306e1c9e right > now, but it takes more than day to copy the data and recreate all the > snapshots. But a test with ^skinny-metadata showed no problems, so I > don't thing I got bitten by that bug. > > I have btrfs-image of one of previous runs after crashed balance. > It's 15GB. I can place it somewhere with fast link, are you interested? > > Yup, send me the link and I'll pull it down. Thanks, Josef