From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:53855 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750734AbaHWNJ6 (ORCPT ); Sat, 23 Aug 2014 09:09:58 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1XLB4t-0001zU-TO for linux-btrfs@vger.kernel.org; Sat, 23 Aug 2014 15:09:55 +0200 Received: from pd953eba6.dip0.t-ipconnect.de ([217.83.235.166]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 23 Aug 2014 15:09:55 +0200 Received: from holger.hoffstaette by pd953eba6.dip0.t-ipconnect.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 23 Aug 2014 15:09:55 +0200 To: linux-btrfs@vger.kernel.org From: Holger =?iso-8859-1?q?Hoffst=E4tte?= Subject: Re: Unclean shutdowns cause google-chrome profile to be corrupted in various ways Date: Sat, 23 Aug 2014 13:09:42 +0000 (UTC) Message-ID: References: <20140822155040.GU3875@merlins.org> <20140822184919.GE3875@merlins.org> <20140823031055.GH3875@merlins.org> <20140823123249.GJ3875@merlins.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Sat, 23 Aug 2014 05:32:49 -0700, Marc MERLIN wrote: > [snip] > Thanks for that data point, so that rules out discard and SSDs. > > Given that, it sounds like btrfs may still have a bug where everything > does not get to disk in the right order before the system stops. A popular candidate for this is mmap'ed IO (almost always a bad idea, certainly for writes). This almost always goes wrong one way or the other, depending on filesystem + block/VFS/mm bugs of the day. -h