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=-1.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 BB3E9C43381 for ; Thu, 14 Feb 2019 18:25:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 88F7C21B24 for ; Thu, 14 Feb 2019 18:25:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=intel-com.20150623.gappssmtp.com header.i=@intel-com.20150623.gappssmtp.com header.b="xmcCQWPv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392904AbfBNSZT (ORCPT ); Thu, 14 Feb 2019 13:25:19 -0500 Received: from mail-ot1-f50.google.com ([209.85.210.50]:36170 "EHLO mail-ot1-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389690AbfBNSZT (ORCPT ); Thu, 14 Feb 2019 13:25:19 -0500 Received: by mail-ot1-f50.google.com with SMTP id v62so3327655otb.3 for ; Thu, 14 Feb 2019 10:25:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=+LwC+e/wfz0phwsvG3UA7Kxyo8TmV6yoBd0ExF7DlW4=; b=xmcCQWPvi1tk0wx/+640HuxnyKNJnavefeN7OquFeviACdB+I3NqbWlo91L0PAtpu5 dkfsZFDXpnac5GQj9mR2JyrCdE/nqvVjjuapSYOpnTfpXQR4W8KdcCMmxx1Pw1FW+GdK hAyEznua/qD92KaKxMW+Gctzoswj4JliVw0t2unJCsxP2hq0mko/o8H15ftbOrKjwHDz V9vBTsDewBKoMSXzSFz1CIGExWB5ziAQOqO/lz2VshL6FqIdKqyZiQtYSMx3/b58rAKr WGs3KpMu2COOGyiAlGnMEgIbtBpudxVMdesC5okQpMLayZvGJxjzt3MK2ngjUfCbF6Bk Tx9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=+LwC+e/wfz0phwsvG3UA7Kxyo8TmV6yoBd0ExF7DlW4=; b=LWSjjlGkCbYv1GXxLGlaur59dS1hlGFGgkdT/A9F9zPPnMVTCY2iBcrMFJ6PexUI9e 9Pp1sAUQdFbCykQmvoW3g+6ZGgSmoeQ2mPvTrxIcPy/7IOIC26V8jlWHkS6Ib6dq+PaT AkGSa+FMH747s/VV2VigFoU4rzkfquF7q5sdbaWbKX/FjzgvzWPxqWynxBUpZTOTPEzT 6RtgF9FRR5lqhF3YtF+ZYTm7RS7emr0IfrmRGtKxELPWr1+YqGOXYWqp9xrHLjvdZuce tyI8DdkxFbWjkflIvduRKbi2fIWusrdoU5TzzG+OkvKKDKnvHHN+Je2bS8X1PCI7zna3 65HQ== X-Gm-Message-State: AHQUAubEB4V5gKgdXQIgaQPvqr+z2qfqPO2JRAueFD9kD++bajuBZ1PX pG7hNiWMpzaBhqQzaAQT8X7Ce7YHsQfNrdAAHHV9IQ== X-Google-Smtp-Source: AHgI3IbnVCugpE3Z3TuIXgzzpIW2bhHG1b8KnucO+K5F+0eWFNyJPwJNhrQScGtCUaNp7Uq9wSjup/Hte5V+E7+tXnM= X-Received: by 2002:a9d:4c85:: with SMTP id m5mr1976349otf.367.1550168718363; Thu, 14 Feb 2019 10:25:18 -0800 (PST) MIME-Version: 1.0 References: <20190214134622.GG4525@dhcp22.suse.cz> In-Reply-To: <20190214134622.GG4525@dhcp22.suse.cz> From: Dan Williams Date: Thu, 14 Feb 2019 10:25:07 -0800 Message-ID: Subject: Re: [Lsf-pc] [LSF/MM TOPIC] The end of the DAX experiment To: Michal Hocko Cc: lsf-pc@lists.linux-foundation.org, linux-xfs , linux-fsdevel , linux-ext4 , Linux Kernel Mailing List , linux-nvdimm Content-Type: text/plain; charset="UTF-8" Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Thu, Feb 14, 2019 at 5:46 AM Michal Hocko wrote: > > On Wed 06-02-19 13:12:59, Dan Williams wrote: > [...] > > * Userfaultfd for file-backed mappings and DAX > > I assume that other topics are meant to be FS track but this one is MM, > right? Yes, but I think it is the lowest priority of all the noted sub-topics in this proposal. The DAX-reflink discussion, where a given physical-page may need to be mapped into multiple inodes at different offsets, might be more fruitful to have as a joint discussion with MM.