* OS personality emulation (like WSL but doesn't require root)
* New synchronization primitives to user space (like XOK's wake predicates)
* A lot of others..
Modern BPF is the exploring the same cornerstones as exokernels and really opens up a whole bunch of concepts that haven't been seen in mainstream kernels, particularly if non privileged users are allowed to invoke it.
* KVM device MMIO emulation
* OS personality emulation (like WSL but doesn't require root)
* New synchronization primitives to user space (like XOK's wake predicates)
* A lot of others..
Modern BPF is the exploring the same cornerstones as exokernels and really opens up a whole bunch of concepts that haven't been seen in mainstream kernels, particularly if non privileged users are allowed to invoke it.