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[99.241.198.116]) by smtp.gmail.com with ESMTPSA id n12-20020a92dd0c000000b002cac22690b6sm6944588ilm.0.2022.04.25.15.51.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Apr 2022 15:51:17 -0700 (PDT) Date: Mon, 25 Apr 2022 18:51:16 -0400 From: Peter Xu To: Artyom Subject: Re: Live Migration ToDo Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=170.10.129.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Cc: leobras@redhat.com, qemu-devel@nongnu.org, dgilbert@redhat.com, quintela@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Apr 26, 2022 at 01:39:58AM +0300, Artyom wrote: > Thank you for your response. Yes, I would like to work on some task, and > eventually I would like to use it as my student project. For example, it > might be possible to implement the technique from the article Post-Copy, > Hines, 2009: demand paging, active push, prepaging and dynamic > self-ballooning. As far as I understood from the postcopy documentation, > the pages are pushed sequentially, but it is possible to implement a new > prepaging strategy. Or are there any obstacles to implementing the ideas of > this paper in QEMU? I'm a bit confused. Firstly, Dave implemented postcopy for QEMU years ago, please see migration/postcopy-ram.c. Or do you mean you want to implement some specific optimization for QEMU's postcopy? Thanks, -- Peter Xu