DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026
    root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
Kernel: X86_64_GENERIC (in-tree, vn(4) compiled in, /dev/vn + vn0..vn3 present at boot)
vCPUs: 6 (QEMU/KVM)
Trigger runs as root (vn ioctls require SYSCAP_RESTRICTEDROOT).
Baseline runs: fresh `vm.sh reset with-src` snapshot before each run.
sizeof(struct vn_softc) = 2816 bytes (measured via vmstat -m vn_softc delta).