lock order reversal
1st vr0 @ sys/pci/if_vr.c:806
2nd ACPI root bus @ sys/modules/acpi/acpi/../../../dev/acpica/acpi.c:1056
KDB stack backtrace:
kdb_backtrace
witness_checkorder
_sx_xlock
acpi_release_ressource
bus_generic_release_ressource
ressource_list_release
bus_generic_rl_release_ressource
bus_release_ressource
vr_detach
vr_shutdown
device_shutdown
bus_generic_shutdown
device_shutdown
bus_generic_shutdown
device_shutdown
bus_generic_shutdown
acpi_shutdown
device_shutdown
bus_generic_shutdown
device_shutdown
bus_generic_shutdown
device_shutdown
root_bus_module_handler
module_shutdown
boot
reboot
syscall
Xint0x80_syscall
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