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[188.85.120.92]) by smtp.gmail.com with ESMTPSA id bc15-20020a056402204f00b0050b2f588db6sm2985120edb.16.2023.05.11.08.48.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 May 2023 08:48:54 -0700 (PDT) From: Juan Quintela To: Vladimir Sementsov-Ogievskiy Cc: qemu-devel@nongnu.org, Leonardo Bras , Peter Xu , Avihai Horon , Thomas Huth , Lukas Straub , Alex =?utf-8?Q?Benn=C3=A9e?= , Daniel =?utf-8?Q?P=2EBerrang=C3=A9?= , Markus Armbruster Subject: Re: [PATCH v2] migration: Add documentation for backwards compatiblity In-Reply-To: <3e294e10-12ec-bb00-cf7d-c6b1574fc252@yandex-team.ru> (Vladimir Sementsov-Ogievskiy's message of "Thu, 11 May 2023 17:16:40 +0300") References: <20230511082701.12828-1-quintela@redhat.com> <2912b2c8-41c2-4a9d-64ac-b3a05e66028f@yandex-team.ru> <87o7mr3wo4.fsf@secure.mitica> <3e294e10-12ec-bb00-cf7d-c6b1574fc252@yandex-team.ru> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) Date: Thu, 11 May 2023 17:48:53 +0200 Message-ID: <87bkiq50nu.fsf@secure.mitica> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=170.10.133.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H2=-0.001, 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: , Reply-To: quintela@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Vladimir Sementsov-Ogievskiy wrote: > On 11.05.23 15:00, Juan Quintela wrote: >>>> +Now we start with the more interesting cases. Let start with the >>>> +same qemu but not the same machine type. >>> sounds like "different machine type on source and target" for me.. >>> >>> Maybe, "not latest machine type" ? >> Now we start with the more interesting cases. Let start with a the >> same QEMU process and a different QEMU version machine type. >> Better? > > No) > > Neither I have good wording in mind. That doesn't really matter I > think, so don't worry, meaning is obvious from the context anyway. > > I just mean, that for me: > > "same" here: source.qemu.version == target.qemu.version > > "different" here: source.qemu.machine_type != target.qemu.machine_type > -- but you don't mean this and this case doesn't work anyway Ah, I see what you mean know. > > What you mean by "different" that machine type is not equal to qemu > version.. But formally, it's never "equal", actually, latest machine > type of the qemu version "corresponds" to that qemu version. > > Maybe: > > "Consider the case with same QEMU version (5.2) but not latest (not 5.2) machine type:" Now we start with the more interesting cases. Consider the case where we have the same QEMU version in both sides (qemu-5.2) but we are using the latest machine type for that version (pc-5.2) but one of an older QEMU version, in this case pc-5.1. Better? Later, Juan.