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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id gb26sm4127656ejc.25.2021.05.21.09.43.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 21 May 2021 09:43:53 -0700 (PDT) Subject: Re: [PATCH v2 1/7] block-copy: streamline choice of copy_range vs. read/write To: Vladimir Sementsov-Ogievskiy , Emanuele Giuseppe Esposito , qemu-block@nongnu.org References: <20210518100757.31243-1-eesposit@redhat.com> <20210518100757.31243-2-eesposit@redhat.com> <5a4cc9ae-f419-ab40-cd7a-d30e39f91e54@redhat.com> <5f93d053-0370-a179-0c81-27434430fd43@virtuozzo.com> From: Paolo Bonzini Message-ID: <422ffd3a-32bd-1133-1d9b-f27833e46502@redhat.com> Date: Fri, 21 May 2021 18:43:52 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <5f93d053-0370-a179-0c81-27434430fd43@virtuozzo.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.374, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , John Snow , qemu-devel@nongnu.org, Stefan Hajnoczi , Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 21/05/21 17:48, Vladimir Sementsov-Ogievskiy wrote: > I keep it thinking about further moving qemu-img convert to block-copy. > But I don't even have a plan when to start this work. So, if we want to > do something around copy_range here to prepare for thread-safety, let's > just drop it for now as unused on top of "[PATCH v2 00/33] block: > publish backup-top filter" (you can take one patch that drop copy_range > support in backup to your series to not make a dependency). It's not > difficult to reimplement it later. Then we'll have this same conversation later. I would hope that this series goes in before yours. Paolo