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envelope-from=steven.sistare@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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: 2.1.29 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 10/8/2024 10:33 AM, Vladimir Sementsov-Ogievskiy wrote: > On 30.09.24 22:40, Steve Sistare wrote: >> Some devices need new kernel software interfaces >> to allow a descriptor to be used in a process that did not originally open it. > > Hi Steve! > > Could you please describe, which kernel version / features are required? I'm mostly interested in migration of tap and vhost-user devices. For tap and vhost kernel, no special kernel features are required. But in addition to these cpr-transfer patches, you will need the "Live Update: tap and vhost" RFC V1 that I posted, and it might not apply cleanly to this most recent cpr-transfer series. I will eventually update that series, but not immediately. Also, I have never tried vhost-user, so not sure it will work without additional changes in qemu. - Steve