DragonFly dfbsd 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026  root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64
QEMU: qemu-system-x86_64 -enable-kvm -m 4096 -smp 6 + -device usb-ehci,id=ehci0 [-device usb-mouse,bus=ehci0.0 | -device usb-storage,...]
USB: ugen0.2 <QEMU QEMU USB Mouse> at usbus0 (EHCI, HIGH speed)
     /dev/usb/0.2.0 (control), /dev/usb/0.2.1 (interrupt IN) -- default 0600 root:operator
     /dev/usb/0.2.2 (bulk OUT) for the usb-storage variant (umass NOT loaded)
unpriv user: maxx uid=1001, added to group operator (standard libusb-access setup), nodes chmod 0660
kernel modules: ehci.ko, xhci.ko in-kernel at boot; ums.ko unloaded for read-side run; umass never loaded for write-side run
vmstat -m baseline: USB 16 allocs / 19.8K ; USBdev 23 / 6.09K