From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBD18C352A3 for ; Thu, 13 Feb 2020 19:05:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C665B2168B for ; Thu, 13 Feb 2020 19:05:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728069AbgBMTFP (ORCPT ); Thu, 13 Feb 2020 14:05:15 -0500 Received: from mga18.intel.com ([134.134.136.126]:15702 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726282AbgBMTFO (ORCPT ); Thu, 13 Feb 2020 14:05:14 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Feb 2020 11:05:14 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,437,1574150400"; d="scan'208";a="347785343" Received: from iweiny-desk2.sc.intel.com ([10.3.52.157]) by fmsmga001.fm.intel.com with ESMTP; 13 Feb 2020 11:05:13 -0800 Date: Thu, 13 Feb 2020 11:05:13 -0800 From: Ira Weiny To: Jeff Moyer Cc: linux-kernel@vger.kernel.org, Alexander Viro , "Darrick J. Wong" , Dan Williams , Dave Chinner , Christoph Hellwig , "Theodore Y. Ts'o" , Jan Kara , linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH v3 00/12] Enable per-file/directory DAX operations V3 Message-ID: <20200213190513.GB22854@iweiny-DESK2.sc.intel.com> References: <20200208193445.27421-1-ira.weiny@intel.com> <20200211201718.GF12866@iweiny-DESK2.sc.intel.com> <20200213190156.GA22854@iweiny-DESK2.sc.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200213190156.GA22854@iweiny-DESK2.sc.intel.com> User-Agent: Mutt/1.11.1 (2018-12-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 13, 2020 at 11:01:57AM -0800, 'Ira Weiny' wrote: > On Wed, Feb 12, 2020 at 02:49:48PM -0500, Jeff Moyer wrote: > > Ira Weiny writes: > > [snip] > > Given that we document the dax mount > > option as "the way to get dax," it may be a good idea to allow for a > > user to selectively disable dax, even when -o dax is specified. Is that > > possible? > > Not with this patch set. And I'm not sure how that would work. The idea was > that -o dax was simply an override for users who were used to having their > entire FS be dax. We wanted to depreciate the use of "-o dax" in general. The > individual settings are saved so I don't think it makes sense to ignore the -o > dax in favor of those settings. Basically that would IMO make the -o dax > useless. Oh and I forgot to mention that setting 'dax' on the root of the FS basically provides '-o dax' functionality by default with the ability to "turn it off" for files. Ira > > Ira >