[$] An update on netkit and the use of BPF in user space

Daniel Borkmann led a session at the 2026Linux Filesystem, Memory-Management,and BPF Summit about the progress that has been made with netkit, the subsystemthat allows virtual machines (VMs) running on Linux to perform networking efficiently.When that did not fill the full time, he went on to discuss his idea forusing BPF to live-patch user-space applications. While netkit is makingprogress, and can now support zero-copy receipt of packets into a VM in anetwork namespace, the idea of using BPF for patching user-space programsremains entirely speculative.