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[99.254.121.117]) by smtp.gmail.com with ESMTPSA id af79cd13be357-79f19028ab0sm298959685a.64.2024.07.11.07.56.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Jul 2024 07:56:58 -0700 (PDT) Date: Thu, 11 Jul 2024 10:56:56 -0400 From: Peter Xu To: Fabiano Rosas Cc: Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org, qemu-block@nongnu.org, Laurent Vivier , Tyrone Ting , Bin Meng , Hao Wu , Francisco Iglesias , Paolo Bonzini , Thomas Huth , =?utf-8?Q?C=C3=A9dric?= Le Goater , qemu-arm@nongnu.org, Joel Stanley , Sai Pavan Boddu , devel@lists.libvirt.org, Luc Michel , =?utf-8?Q?C=C3=A9dric?= Le Goater Subject: Re: [PATCH v3 06/17] hw/sd/sdcard: Do not store vendor data on block drive (CMD56) Message-ID: References: <874j8xfc9s.fsf@suse.de> <871q41f2pk.fsf@suse.de> <87ttgxdj1p.fsf@suse.de> <87plrkdpd7.fsf@suse.de> <87h6cwdm4n.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <87h6cwdm4n.fsf@suse.de> Received-SPF: pass client-ip=170.10.133.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.142, 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_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: 2.1.29 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 Thu, Jul 11, 2024 at 11:44:08AM -0300, Fabiano Rosas wrote: > But of course, that means we cannot claim to support all kinds of > forward migrations anymore. Only those in the 6 year period. That "6 years" comes from machine type deprecation period, and migration compatibility is mostly only attached to machine types, and we only ever allowed migration with the same machine type. It means, >6 years migration will never work anyway as soon as we start to deprecate machine types (irrelevant of any reuse of UNUSED), because the >6 years machine types will simply be gone.. See configuration_post_load(), where it'll throw an error upfront when machine type mismatched. -- Peter Xu