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([2a01:e0a:280:24f0:576b:abc6:6396:ed4a]) by smtp.gmail.com with ESMTPSA id y19-20020ac85253000000b00401eafa8f1fsm48938qtn.24.2023.06.26.09.39.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 26 Jun 2023 09:39:18 -0700 (PDT) Message-ID: <22784bf5-b4bf-2fb7-985c-dfd69899ed1d@redhat.com> Date: Mon, 26 Jun 2023 18:39:16 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: [PATCH 3/3] vfio/migration: Make VFIO migration non-experimental Content-Language: en-US To: Jason Gunthorpe Cc: Joao Martins , Avihai Horon , Alex Williamson , Juan Quintela , Peter Xu , Leonardo Bras , Zhenzhong Duan , Yishai Hadas , Maor Gottlieb , Kirti Wankhede , Tarun Gupta , qemu-devel@nongnu.org References: <20230626082353.18535-1-avihaih@nvidia.com> <20230626082353.18535-4-avihaih@nvidia.com> <62b1ce2a-8191-fc6b-c7b7-e4c787deacf5@oracle.com> <78ef9a6d-25ac-e0ac-ca52-5a0673df661e@redhat.com> From: =?UTF-8?Q?C=c3=a9dric_Le_Goater?= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@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=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.09, 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, 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 6/26/23 18:19, Jason Gunthorpe wrote: > On Mon, Jun 26, 2023 at 05:26:42PM +0200, Cédric Le Goater wrote: > >> Since dirty tracking is a must-have to implement migration support >> for any existing and future VFIO PCI variant driver, anything else >> would be experimental code and we are trying to remove the flag ! >> Please correct me if I am wrong. > > I don't think we should call it experimental - it is like other qemu > options where we can choose to run qemu in a suboptimal way. In that case, whether the driver implements dirty tracking or not is not a condition to enable migration, only the host kernel driver support is. C.