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Tsirkin" To: Daniel =?iso-8859-1?Q?P=2E_Berrang=E9?= Subject: Re: [RFC v3] VFIO Migration Message-ID: <20201116070417-mutt-send-email-mst@kernel.org> References: <20201110095349.GA1082456@stefanha-x1.localdomain> <64fb6a41-fbfa-994c-9619-4df41ac97fde@redhat.com> <20201111143615.GA1421166@stefanha-x1.localdomain> <20201111154850.GG906488@redhat.com> MIME-Version: 1.0 In-Reply-To: <20201111154850.GG906488@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/16 04:46:27 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_H5=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: John G Johnson , "Tian, Kevin" , Yan Zhao , quintela@redhat.com, Jason Wang , "Zeng, Xin" , qemu-devel@nongnu.org, "Dr. David Alan Gilbert" , Kirti Wankhede , Paolo Bonzini , Alex Williamson , Gerd Hoffmann , Stefan Hajnoczi , Felipe Franciosi , Christophe de Dinechin , Thanos Makatos Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, Nov 11, 2020 at 03:48:50PM +0000, Daniel P. Berrangé wrote: > In terms of validation I can't help but feel the whole proposal is > really very complicated. > > In validating QEMU migration compatibility we merely compare the > versioned machine type. > > IIUC, in this proposal, it would be more like exploding the machine > type into all its 100's of properties and then comparing each one > individually. > > I really prefer the simpler model of QEMU versioned machine types > where compatibility is a simple string comparison, hiding the > 100's of individual config parameters. I think we need to ship a tool with QEMU that handles this complexity. If the tool spits out a very long string with all the needed parameters, management won't need to care that it's not just a short machine type. -- MST