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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 037F0FC6194 for ; Fri, 8 Nov 2019 03:30:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CD450206C3 for ; Fri, 8 Nov 2019 03:30:45 +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="FRfas5SP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729408AbfKHDao (ORCPT ); Thu, 7 Nov 2019 22:30:44 -0500 Received: from mail-oi1-f193.google.com ([209.85.167.193]:40439 "EHLO mail-oi1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726320AbfKHDao (ORCPT ); Thu, 7 Nov 2019 22:30:44 -0500 Received: by mail-oi1-f193.google.com with SMTP id 22so4041759oip.7 for ; Thu, 07 Nov 2019 19:30:43 -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=NtB37+Q8xvWyEYnhovPvzQrhxqS2lBLxSLUijnwj9JI=; b=FRfas5SPxBMSC4DVisx8MORabFwIgq5lwySDwgKd1CXjN2fmnInTfTzfd/12Zf4kwd 7s723mPTXcsbd4eONjrHEs1ExgPXRwpD2so5jW/aA0M1j/Mdd21FWzvKz0NNmR8g45UJ TSQvt/gLwuJ6jvkLvIFFG99T33Yk9Cuk+48m9VmhXMIrFyIZ5Bs2VqKW3s5qR18L4Zss vtb2BBZfNNSJTS8qKcpJnHqR4TdOcX/rVLqIsKfr3LD0e2zcHemW+nGkBXnGKpTnunJz GhcE+cPH7t8F31zni88ZgcGawamvuyZxMQMOgqg9KFlYwMrlRm/u/3PmtnsGgfNQZAV+ TqKw== 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=NtB37+Q8xvWyEYnhovPvzQrhxqS2lBLxSLUijnwj9JI=; b=Kz7msFpPA15GS28QN7bnQ38YW1LHWt0JcTmMDd6CxwHFLc1CsGZ6/dN5BsEbybMYLw zICgZLwQej2rr4f6HW+YZF80S237CWvRMH5eig/RQBK6fHNCqSWhZ5u45Dtk+QgGfLy9 NtiaEvDpaCDi/y5yaJUSyaK+YWJbghNb9E+YWp9IFwGbQ8/oFShszq33h9NRnddK54I8 HH+TniwdYosUINOYODRMRd+Ft/44UcOtHRTCWOdrkjEGFwqd+P11NadTalyvVBeOXLCr XFY6vslSmgz0QuxKAFI3n1MrU+R8Yv6HqnwEo9mV2EzZY4TGD5YXEtZiC80L4y2uQFLV xp3w== X-Gm-Message-State: APjAAAXDmBu0V+b4ucGN5EoHUDG8ruMY5Cm4gX8Jdm3hZnyKdoZnI8SW lBG01X1BCDWzseNSVE7ljgMTRJEJJVRAY/FxVxlX5A== X-Google-Smtp-Source: APXvYqzkdkYe4VeO2i7N7ZYvtM3Hm00GKsbQ7o4949RHdq20XH0TD40W5eXI5rdUew808QiCN7vktLt6WHrVYh8m+0A= X-Received: by 2002:aca:3d84:: with SMTP id k126mr6733699oia.70.1573183843511; Thu, 07 Nov 2019 19:30:43 -0800 (PST) MIME-Version: 1.0 References: <20191030041358.14450-1-ruansy.fnst@cn.fujitsu.com> In-Reply-To: From: Dan Williams Date: Thu, 7 Nov 2019 19:30:32 -0800 Message-ID: Subject: Re: [RFC PATCH v2 0/7] xfs: reflink & dedupe for fsdax (read/write path). To: Shiyang Ruan Cc: linux-xfs , linux-nvdimm , "Darrick J. Wong" , Goldwyn Rodrigues , Christoph Hellwig , david , Linux Kernel Mailing List , gujx@cn.fujitsu.com, qi.fuli@fujitsu.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 7, 2019 at 7:11 PM Shiyang Ruan wrote: > > Hi Darrick, Dave, > > Do you have any comment on this? Christoph pointed out at ALPSS that this problem has significant overlap with the shared page-cache for reflink problem. So I think we need to solve that first and then circle back to dax reflink support. I'm starting to take a look at that.