xhyve.diff

-Usage: xhyve [-behuwxMACHPWY] [-c vcpus] [-g <gdb port>] [-l <lpc>]
-             [-m mem] [-p vcpu:hostcpu] [-s <pci>] [-U uuid] -f <fw>
+Usage: com.docker.hyperkit [-behuwxMACHPWY] [-c vcpus] [-F <pidfile>] [-g <gdb port>] [-l <lpc>]
+                           [-m mem] [-p vcpu:hostcpu] [-s <pci>] [-U uuid] -f <fw>
        -A: create ACPI tables
        -c: # cpus (default 1)
        -C: include guest memory in core file
        -e: exit on unhandled I/O access
        -f: firmware
+       -F: pidfile
        -g: gdb port
        -h: help
        -H: vmexit from the guest on hlt