Snap from 31.05.2018 with
OpenBSD 6.3-current (GENERIC.MP) #0: Sat Jun 2 16:21:22 CEST 2018
k...@x250.my.domain:/usr/src/sys/arch/amd64/compile/GENERIC.MP
acquiring duplicate lock of same type: "&mp->mnt_lock"
1st vfslock @ /usr/src/sys/kern/vfs_subr.c:191
2nd vfslock @ /usr/src/sys/kern/vfs_subr.c:191
Starting stack trace...
witness_checkorder(9,ffffffff81ab15c8,bf,ffff800000d00040,21) at
witness_checkorder+0x63d
_rw_enter(0,1,0,ffff800000d00000) at _rw_enter+0x56
vfs_stall(1,ffff800000025400) at vfs_stall+0xab
acpi_sleep_state(ffff800000025400,ffff800000025400) at acpi_sleep_state+0x1a7
acpi_sleep_task(ffff800000025400,ffff80000002a2e0) at acpi_sleep_task+0x10
acpi_thread(0) at acpi_thread+0x1b8
end trace frame: 0x0, count: 251
End of stack trace.
