From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754811AbbEUDY4 (ORCPT ); Wed, 20 May 2015 23:24:56 -0400 Received: from relay4-d.mail.gandi.net ([217.70.183.196]:32908 "EHLO relay4-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752540AbbEUDYz (ORCPT ); Wed, 20 May 2015 23:24:55 -0400 X-Originating-IP: 50.43.43.179 Date: Wed, 20 May 2015 20:24:48 -0700 From: Josh Triplett To: Henrique de Moraes Holschuh Cc: "Theodore Ts'o" , Lukas Czerner , linux-kernel@vger.kernel.org Subject: Re: Nature of ext4 corruption fixed by recent patch? Message-ID: <20150521032448.GA14632@x> References: <20150518225824.GA21502@cloud> <20150519134005.GB20421@thunk.org> <20150519163739.GC2598@x> <20150519175024.GA26822@thunk.org> <20150520225033.GA7368@cloud> <20150521012322.GA18542@khazad-dum.debian.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150521012322.GA18542@khazad-dum.debian.net> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 20, 2015 at 10:23:22PM -0300, Henrique de Moraes Holschuh wrote: > On Wed, 20 May 2015, josh@joshtriplett.org wrote: > > md-based RAID0, on top of a pair of SSDs. > > Might this be it? It was mentioned in another, more recent thread about > data loss involving md-raid0 and ssds... > > https://bugzilla.kernel.org/show_bug.cgi?id=98501 That looks extremely likely, particularly since I do have the "discard" option enabled. And discarding the wrong blocks seems entirely consistent with the symptoms I've observed. Thanks! I'll disable discard as a short-term workaround until that change goes into the Debian kernel. - Josh Triplett