From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from magic.merlins.org ([209.81.13.136]:51562 "EHLO mail1.merlins.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754121AbaHNR1o convert rfc822-to-8bit (ORCPT ); Thu, 14 Aug 2014 13:27:44 -0400 Date: Thu, 14 Aug 2014 10:27:43 -0700 From: Marc MERLIN To: Austin S Hemmelgarn Cc: linux-btrfs@vger.kernel.org, jbacik@fb.com, clm@fb.com, takeuchi_satoru@jp.fujitsu.com Subject: Re: btrfs-zero-log fails, can't mount FS Message-ID: <20140814172743.GC27531@merlins.org> References: <20140814160902.GA25370@merlins.org> <53ECE953.70009@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <53ECE953.70009@gmail.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Thu, Aug 14, 2014 at 12:52:35PM -0400, Austin S Hemmelgarn wrote: > I don't think it is likely that the Samsung SSD is to blame, in my > experience Samsung's SSD's are better than almost every other brand > except Intel, and I know that they honor write-barriers correctly. > The likely issue is that the system hung during the process of a commit, > which is one of the few things that I know of that consistently corrupts > the filesystem. There isn't really anything I know of to prevent it, > except for making your system as stable as possible. > Interestingly, this type of thing is the only issue I've ever had with > BTRFS that wasn't traceable to hardware problems. That was my understanding too, thanks for confirming. Until this bug gets fixed, I'm perplexed as to why btrfs-zero-log isn't fixing this. Can't I unroll the last commits until I get to a stable one? As luck would have it (again), I'm boarding a plane to Chicago tomorrow to go speak at linuxcon about btrfs. I would very much like not to have to spend 12H to restore my SSD from backup :) Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/