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=-14.8 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1, USER_IN_DEF_DKIM_WL 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 2C212C433E6 for ; Sat, 6 Feb 2021 03:11:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0007B64DF2 for ; Sat, 6 Feb 2021 03:11:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232157AbhBFDLV (ORCPT ); Fri, 5 Feb 2021 22:11:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38306 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231366AbhBFCiZ (ORCPT ); Fri, 5 Feb 2021 21:38:25 -0500 Received: from mail-ot1-x336.google.com (mail-ot1-x336.google.com [IPv6:2607:f8b0:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4D6FEC0698C3 for ; Fri, 5 Feb 2021 14:22:04 -0800 (PST) Received: by mail-ot1-x336.google.com with SMTP id o12so8360980ote.12 for ; Fri, 05 Feb 2021 14:22:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:in-reply-to:message-id:references :user-agent:mime-version; bh=7+LsQN+DZU7iaItTdPpaGXfVMqU1+ZGF7ata7+D446k=; b=aEITx9s+GN2rbIdwwFbs+hxDrFe0qhiTxg5DQZDQXsOSyKHogVOEB9Pd9C3SgwOdJc FY1DXrTm/JB+iFyvd6TZ+wRCpv/WBYyN5yOLKMI4xKoPpGAwl7a9gidYgiYUUZdCAjeS dw8djYItdQYN8VaC7vSaVqS5DpN37JhtAxB1p6UIWW4PRPdPuPT0bmO/W/66466JN7kR gtoYC2VFyRTFjQCvc20DeSqP0gzk8hjoan9dOEbyktIQE5LhjX1je+6359k9aU5kobeQ 6Fz/9Su93yrp3jGHhgpP8mLXVrFNeQOb+/x7H9iM9/ho+SvmTNeKMBiaKC3mREPZFBL2 e0VQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:in-reply-to:message-id :references:user-agent:mime-version; bh=7+LsQN+DZU7iaItTdPpaGXfVMqU1+ZGF7ata7+D446k=; b=CBHeByYpMZ6lLx93TJMiRvYGym6uICcdIk77T/VutTTCxOBoqrWe2F8+IKGdZfjGlb Al9PfavQ13alEQpOvxzdkOhmWgrpWzqm349QVZ0jCaek6G5hwaWbfwHBDz0gyJdnHgMG +LPb9k6WkAzKssppM+/xsWxNvm3lv5VhohstGPpLk5+Fr0r17EHNiaDDt8JnV9FseTz9 ExIk/CHhCU4lAgRLLhfmGzqKSe+8UvOIMz43jMkqS5HHkIvJlXcYYpuR+LtWoEWFz6RY VnT2Un8ObfaN6np+JVHqJS/I9DDFaTWLKn6j4TH7wVpkCQ1np2HOBI3EdQWFaYbnTDeJ ZdJw== X-Gm-Message-State: AOAM532G28zl2dokOsOX6igtWAneXB5lk6kvDNqhimJu1ToaaK9qArST gf6E1dzLzMSJOt7dNJsYcCzSyQ== X-Google-Smtp-Source: ABdhPJzLu3Pb1TQiUwd7eoE8RgpDWe5b6n4IVlIEjT114cuL+mR5Zb2TmEPQeY5neGluqAXw/ZJa2w== X-Received: by 2002:a9d:10c:: with SMTP id 12mr4895355otu.153.1612563722059; Fri, 05 Feb 2021 14:22:02 -0800 (PST) Received: from eggly.attlocal.net (172-10-233-147.lightspeed.sntcca.sbcglobal.net. [172.10.233.147]) by smtp.gmail.com with ESMTPSA id p23sm2139182otk.51.2021.02.05.14.22.00 (version=TLS1 cipher=ECDHE-ECDSA-AES128-SHA bits=128/128); Fri, 05 Feb 2021 14:22:01 -0800 (PST) Date: Fri, 5 Feb 2021 14:21:47 -0800 (PST) From: Hugh Dickins X-X-Sender: hugh@eggly.anvils To: Peter Xu cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Mike Rapoport , Mike Kravetz , Jerome Glisse , "Kirill A . Shutemov" , Hugh Dickins , Axel Rasmussen , Matthew Wilcox , Andrew Morton , Andrea Arcangeli , Nadav Amit Subject: Re: [PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs In-Reply-To: <20210129224938.GC260413@xz-x1> Message-ID: References: <20210115170907.24498-1-peterx@redhat.com> <20210129224938.GC260413@xz-x1> User-Agent: Alpine 2.11 (LSU 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 29 Jan 2021, Peter Xu wrote: > > Huge & Mike, > > Would any of you have comment/concerns on the high-level design of this series? > > It would be great to know it, especially major objection, before move on to an > non-rfc version. Seeing Mike's update prompts me to speak up: I have been looking, and will continue to look through it - will report when done; but find I've been making very little forward progress from one day to the next. It is very confusing, inevitably; but you have done an *outstanding* job on acknowledging the confusion, and commenting it in great detail. Hugh