Received: by 2002:a05:7412:b10a:b0:f3:1519:9f41 with SMTP id az10csp906735rdb; Fri, 1 Dec 2023 01:32:41 -0800 (PST) X-Google-Smtp-Source: AGHT+IHFt53w+5pvJIleS3KCV18zhw56doqAePG/8XmqPGC/iJ0H0aMtdBA8/r2fjiI1hlkrHu6d X-Received: by 2002:a05:6870:8894:b0:1f9:496b:e261 with SMTP id m20-20020a056870889400b001f9496be261mr26425585oam.15.1701423161614; Fri, 01 Dec 2023 01:32:41 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1701423161; cv=none; d=google.com; s=arc-20160816; b=Wcl0S4K2kuDccM/Kxt5stiDJwaeJ5mWM9tWcJrZDxp/FHHwcj9m7Ed3xZyEJW0/exE Jh08GWbKiKTh+lPB4kKFngSXswVdjyoBc96nVPUQmctumv+5FqsgAcwShSLCvQIjt8XL im0KwJy84QvD7uu//mtfNNCyFixVf65aAQ0zwtUMw0QeAMHvGKO5w9vsbbLQ0oDCOHtu 5t9ZfARjHT09QzCkA8Rk6Skn79oBH9Juao0N+y99cc9mz/nxFnpBBnXBwcG3j1uVHKK6 mZDcO+ETUxjZtf5Grs6D2aIPW6Tjk/BQlwzYqIZuDH9A0adygKaVh60lylBUze9cx5Kz fKdQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:in-reply-to :organization:autocrypt:from:references:cc:to:content-language :subject:user-agent:mime-version:date:message-id:dkim-signature; bh=aHQs+9zlQ8PVnO/IT7ptVfgOYh9mlV/hOr1XHdCyFZs=; fh=r7KdKVAL7k4c9rp7rdGdyCf/T/MXpum3hsN275SAEiw=; b=Oowm7ZbrbM11LkP1viDnhAv4Uuwwo/LWrQqTGRUXSPxAryyFVwiD5Arkp9EErzJtF/ Tv3A5SbmXMfZiwURTmYoZmlp+yDkDX5k5zjs1d1uNnKdIF3WorxTbGpx/h5WJvN4qXoZ h0uyojR9I0Dhllho2SWOJotJMOL0noOxkmybhUPwUf4s5QLqC1KcugOHe01SPDWNljCR a7RAxUbQuV9hy0HGUasMyTa0MEccR3dzcMvlqWbMd6Vi34EBXR5Afh97JL8qS7VHsC32 hJ6RpbH4PcqYQ1q4M9yFvCems7IJsaQNrXoLdbQwMNM1gqc5UYX0uCQgVfAhcEiK6sDJ pn7w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=KpRcPHrG; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.31 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from morse.vger.email (morse.vger.email. [23.128.96.31]) by mx.google.com with ESMTPS id u21-20020a656715000000b0057755b2f032si3242347pgf.542.2023.12.01.01.32.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Dec 2023 01:32:41 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.31 as permitted sender) client-ip=23.128.96.31; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=KpRcPHrG; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.31 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by morse.vger.email (Postfix) with ESMTP id DF27783393BC; Fri, 1 Dec 2023 01:32:38 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at morse.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378201AbjLAJcN (ORCPT + 99 others); Fri, 1 Dec 2023 04:32:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378180AbjLAJbv (ORCPT ); Fri, 1 Dec 2023 04:31:51 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 888721FEB for ; Fri, 1 Dec 2023 01:29:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701422980; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=aHQs+9zlQ8PVnO/IT7ptVfgOYh9mlV/hOr1XHdCyFZs=; b=KpRcPHrGOVUY0EBwqCgxGv1RT9pqTtduBQKWaeYGKPwOnOXyk3U5fSbeZJvoFyAAoTWWAH jlNjnmtohh6KZisupr5PQZk5XRDQgza40TiQn2pt7GokfmPEqSGkD9pohIBJ2YbbPXdLpt G/FuIO1sOB4GmzTo+yjV07Vj3OL7O48= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-574-Wh0vwDRROFu8I04CltYUtA-1; Fri, 01 Dec 2023 04:29:38 -0500 X-MC-Unique: Wh0vwDRROFu8I04CltYUtA-1 Received: by mail-wr1-f72.google.com with SMTP id ffacd0b85a97d-3330881541eso1537953f8f.1 for ; Fri, 01 Dec 2023 01:29:38 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701422977; x=1702027777; h=content-transfer-encoding:in-reply-to:organization:autocrypt:from :references:cc:to:content-language:subject:user-agent:mime-version :date:message-id:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=aHQs+9zlQ8PVnO/IT7ptVfgOYh9mlV/hOr1XHdCyFZs=; b=cAP3nug9sYT3zS2InYMiAIkIFNYzxx6GMN0vDSvPzyt189nKDOequsMBaOEHMoeYTA Hr6iz8Op9EBPhlalzEu6O2pvOzEryEaJ3yIvUlXMRl2Gs7zw0hEVXb1AxfD3sJGefNvk LJXDs+ElfEh6bV43mxCrkuv/uitqUosbPvmUaFfDuWOdPZGp8B7SIUWg2Xy+k/nF7S8B Suc6bj2iGuq8JmYFFdEUJqgNVjkluKh3V6fMikNIzBdtmO8BLF41DpYTfy4d5cPye7Dr z+e+0SMpcn2L/ij/L/qeh0CdUUgSK7DncXiJs+VqsI92beJcf8I8DUjwlUFpIZq1VgTs ClYQ== X-Gm-Message-State: AOJu0Yz1wKj0nwNyBrVDRKlJPFcNXTtXYDZ9VoBKTUbLpxRA4h8U0dON 5oI4/Fhv41Mj6O45zLozDjVPXwQ9j7/hxLtnnP683DbDMdqg5/IGGWWOQPoyTSZIDVCQ7qzd9ri 2moUDdGTcg7TdHNgSZ+JXfwIq X-Received: by 2002:a05:6000:1a45:b0:333:2fd2:6f4e with SMTP id t5-20020a0560001a4500b003332fd26f4emr645119wry.88.1701422977202; Fri, 01 Dec 2023 01:29:37 -0800 (PST) X-Received: by 2002:a05:6000:1a45:b0:333:2fd2:6f4e with SMTP id t5-20020a0560001a4500b003332fd26f4emr645087wry.88.1701422976743; Fri, 01 Dec 2023 01:29:36 -0800 (PST) Received: from ?IPV6:2003:cb:c726:4100:c308:78e3:8f80:52ac? (p200300cbc7264100c30878e38f8052ac.dip0.t-ipconnect.de. [2003:cb:c726:4100:c308:78e3:8f80:52ac]) by smtp.gmail.com with ESMTPSA id y17-20020adfee11000000b003330a1d35b6sm3708872wrn.115.2023.12.01.01.29.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 Dec 2023 01:29:36 -0800 (PST) Message-ID: <135306b4-2f94-4266-8f72-90315bb846b4@redhat.com> Date: Fri, 1 Dec 2023 10:29:34 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/6] Supporting GMEM (generalized memory management) for external memory devices Content-Language: en-US To: zhuweixi , Dave Airlie , =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "weixi.zhu@openeuler.sh" , "mgorman@suse.de" , "jglisse@redhat.com" , "rcampbell@nvidia.com" , "jhubbard@nvidia.com" , "apopple@nvidia.com" , "mhairgrove@nvidia.com" , "ziy@nvidia.com" , "alexander.deucher@amd.com" , "Xinhui.Pan@amd.com" , "amd-gfx@lists.freedesktop.org" , "Felix.Kuehling@amd.com" , "ogabbay@kernel.org" , "dri-devel@lists.freedesktop.org" , "jgg@nvidia.com" , "leonro@nvidia.com" , "zhenyuw@linux.intel.com" , "zhi.a.wang@intel.com" , "intel-gvt-dev@lists.freedesktop.org" , "intel-gfx@lists.freedesktop.org" , "jani.nikula@linux.intel.com" , "joonas.lahtinen@linux.intel.com" , "rodrigo.vivi@intel.com" , "tvrtko.ursulin@linux.intel.com" , "Zeng, Oak" References: <20231128125025.4449-1-weixi.zhu@huawei.com> <9308a79d-e312-4e6d-98fe-75dc6d0fbeda@amd.com> <188814aa-4f55-40c6-961c-6105c89d76f3@redhat.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on morse.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (morse.vger.email [0.0.0.0]); Fri, 01 Dec 2023 01:32:39 -0800 (PST) On 01.12.23 03:44, zhuweixi wrote: > Thanks! I hope you understood that that was a joke :) > I am planning to present GMEM in Linux MM Alignment Sessions so I can collect more input from the mm developers. Sounds good. But please try inviting key HMM/driver developer as well. Most of the core-mm folks attending that meeting are not that familiar with these concepts and they are usually not happy about: (1) More core-MM complexity for things that can be neatly handled in separate subsystems with the existing infrastructure already. (2) One new way of doing things why the other things remain in place. (3) New MMAP flags. Usually you have a hard time getting this in. Sometimes, there are other ways (e.g., special-purpose file- systems). (4) Changing controversial core-mm design decisions to handle corner cases. -- Cheers, David / dhildenb