From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ipmail07.adl2.internode.on.net ([150.101.137.131]:8287 "EHLO ipmail07.adl2.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756587AbcLAKuX (ORCPT ); Thu, 1 Dec 2016 05:50:23 -0500 Date: Thu, 1 Dec 2016 21:50:15 +1100 From: Dave Chinner Subject: Re: default mount options Message-ID: <20161201105015.GC11750@dastard> References: <583E1488.7090502@tlinx.org> <6ecda11c-a993-3dd7-5b87-1947506953ff@sandeen.net> <583F2806.7080102@tlinx.org> <583F30C8.1000206@tlinx.org> <20161130221837.GH31101@dastard> <583FA154.9050905@tlinx.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <583FA154.9050905@tlinx.org> Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: L A Walsh Cc: Eric Sandeen , linux-xfs@vger.kernel.org On Wed, Nov 30, 2016 at 08:04:36PM -0800, L A Walsh wrote: > Related -- wondering about how external journals would affect need > for barriers. XFS correctly orders the cache flushes for it's different devices to ensure integrity. e.g. it flushes the caches of the data device which contains the filesytsem metadata before it issues the the FUA write to the external log device. And it does all the right cache flushes for both data and real-time devices on fsync to ensure data updates are stable, too. Cheers, Dave. -- Dave Chinner david@fromorbit.com