Explore the innovative approach of sharing host's io_uring queues with guests to enhance VM I/O performance in this technical talk by Stefano Garzarella from Red Hat. Delve into the intricacies of io_uring system calls, submission and completion queues, and resource registration. Learn about polling techniques and the integration of io_uring with QEMU and virtio block. Examine the necessary changes for io_uring passthrough, its restrictions, and the performance improvements demonstrated in a proof-of-concept. Gain insights into vhost block and VDPA block software devices, and discover the potential future developments in this field.