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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7DFC6D1BDED for ; Mon, 4 Nov 2024 20:19:19 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t83XX-0001py-1K; Mon, 04 Nov 2024 15:19:07 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t83XW-0001pq-Ar for qemu-devel@nongnu.org; Mon, 04 Nov 2024 15:19:06 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t83XT-0000Mi-Ku for qemu-devel@nongnu.org; Mon, 04 Nov 2024 15:19:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1730751541; 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=Acoj7kSSoKZ9/ifEAM7lg4p/iJM1EcekjCrGrtiFLUo=; b=UIopQBPwYuPK1kZrz1er+P3vowFE4IXwK/tQzV42E/anmJgnLtbZ9SAwzUHZ2ocsFGgiB3 ImcC7CAPZAhFom2OXv4PtjrNN+OvZYP+PBbUhAd9SYNbCJaSSgaouyIHNb4A9L2ExIQOfz fMsp3JmItdjIZwgI92ZOw3GaO8Y9Kbg= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-318--kRBlqT-MniUGSob5glOgQ-1; Mon, 04 Nov 2024 15:17:34 -0500 X-MC-Unique: -kRBlqT-MniUGSob5glOgQ-1 Received: by mail-wr1-f71.google.com with SMTP id ffacd0b85a97d-37d462b64e3so2315405f8f.3 for ; Mon, 04 Nov 2024 12:17:34 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730751453; x=1731356253; h=content-transfer-encoding:in-reply-to:organization:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Acoj7kSSoKZ9/ifEAM7lg4p/iJM1EcekjCrGrtiFLUo=; b=LwT6UebTnLioI8U1xDxrL0L7VFCgCosaJv9vwTM8I+iFWA0vQcS/6xK4ShrDHagQz7 SEVr8OZQLlsR0G5YPTx+fp9Xu3FdzHa2EdYXxHYdZq9zyVsPjAiTpaPh2GBJE9vkmUj+ 8TKYHRcYOipecbB23EEL0hnxoBNylFcHb2H5wDa/mEbiwZ4FM1pNM5hrUwjTcL7WVHdz v0fRUlOGs+kpY/HByQ0juarvs3IcDdaZidoWjHVwUSKzv4EUUjnDQgH8NtLWvaHsqCg4 u0q8T3G3CDctwpEPcjCPjISbf2AizhYh2qbuVPUoJAGrgSsUfdltTzw4yMXuP2isHe7e Yk5g== X-Forwarded-Encrypted: i=1; AJvYcCVJNU2LI8vVhrdVYYZKFpMgvvgNg9bQy3AJ8Ht1OlZ25C8l009QhZ02f1Uwm25yiXzgUajtFYAldbOB@nongnu.org X-Gm-Message-State: AOJu0YzQaSs+YCTWAjx8vTvhcnZOBHWEM6YUgf4bsiCFL5iEIVNmhxJ/ e2AYFc05ETc+vfDEpVegX6C6Np8YNEhNSndy4pdfk6RUmJT4YaunaKUgtJrPb28mBo0OBpZ2w4L 4GgrdbKGwhn+HA79FLV0oCyS6Nv4Us+rq2MluVPAmwPZw84QwpGce X-Received: by 2002:a05:6000:2c5:b0:374:b9d7:5120 with SMTP id ffacd0b85a97d-381c7a5e4e3mr11431564f8f.23.1730751453295; Mon, 04 Nov 2024 12:17:33 -0800 (PST) X-Google-Smtp-Source: AGHT+IFTyh0yg9zW87qo8kD2M5uAocyp3z32Gr6ykS5Kvc9RS0mz2NjeItqENZ0jgW7aNqhsWPKtCg== X-Received: by 2002:a05:6000:2c5:b0:374:b9d7:5120 with SMTP id ffacd0b85a97d-381c7a5e4e3mr11431536f8f.23.1730751452918; Mon, 04 Nov 2024 12:17:32 -0800 (PST) Received: from ?IPV6:2003:cb:c72f:e500:e96a:8043:1211:8e6a? (p200300cbc72fe500e96a804312118e6a.dip0.t-ipconnect.de. [2003:cb:c72f:e500:e96a:8043:1211:8e6a]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-381c10d49c9sm14137350f8f.37.2024.11.04.12.17.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 Nov 2024 12:17:31 -0800 (PST) Message-ID: <48418812-331a-436e-83dd-9037acad3573@redhat.com> Date: Mon, 4 Nov 2024 21:17:30 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V3 01/16] machine: anon-alloc option To: Peter Xu Cc: Steven Sistare , qemu-devel@nongnu.org, Fabiano Rosas , Marcel Apfelbaum , Eduardo Habkost , Philippe Mathieu-Daude , Paolo Bonzini , "Daniel P. Berrange" , Markus Armbruster References: <1730468875-249970-1-git-send-email-steven.sistare@oracle.com> <1730468875-249970-2-git-send-email-steven.sistare@oracle.com> <78fa25f1-03dc-400c-a604-998c53e4fbce@redhat.com> <45ea8a8a-928d-4703-b698-d5f910e6a224@oracle.com> <1f1a2742-0429-47d5-958f-b37575c1e4ba@redhat.com> Content-Language: en-US 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 Received-SPF: pass client-ip=170.10.133.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.34, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 04.11.24 21:14, Peter Xu wrote: > On Mon, Nov 04, 2024 at 08:51:56PM +0100, David Hildenbrand wrote: >>> I did that previously, and Peter objected, saying the explicit anon-shared >>> should not override the implicit shared=off. >> >> Yes, it's better if we can detect that somehow. There should be easy ways to >> make that work, so I wouldn't worry about that. > > I still think whenever the caller is capable of passing RAM_SHARED flag > into ram_block_add(), we should always respect what's passed in from the > caller, no matter it's a shared / private request. > > A major issue with that idea is when !RAM_SHARED, we don't easily know > whether it's because the caller explicitly chose share=off, or if it's > simply the type of ramblock that we don't care (e.g. ROMs). Agreed. But note that I think ram_block_add() is one level to deep to handle that. > > So besides what I used to suggest on monitoring the four call sites that > can involve those, another simpler (and now I see it even cleaner..) way > could be that we explicitly introduce RAM_PRIVATE. It means whenever we > have things like below in the callers: Yeah, I called it RAM_FORCE_PRIVATE, but it's the same idea. And simply calling it RAM_PRIVATE makes sense. -- Cheers, David / dhildenb