| LOR |
lock order reversal
1st 0xffffffffb72b48b0 g_xdown (g_xdown) @ geom/geom_io.c:404
2nd 0xffffff01f03d15f0 user map (user map) @ vm/vm_map.c:2994
KDB: stack backtrace:
witness_checkorder() at witness_checkorder+0x654
_sx_xlock() at _sx_xlock+0x51
vm_map_lookup() at vm_map_lookup+0x44
vm_fault() at vm_fault+0xba
trap_pfault() at trap_pfault+0x211
trap() at trap+0x1c5
alltraps_with_regs_pushed() at alltraps_with_regs_pushed+0x5
amr_mapcmd() at amr_mapcmd+0x114
amr_start() at amr_start+0x7b
amr_startio() at amr_startio+0x3e
amr_submit_bio() at amr_submit_bio+0x20
g_disk_start() at g_disk_start+0xbe
b_io_schedule_down() at g_io_schedule_down+0x128
g_down_procbody() at g_down_procbody+0x40
fork_exit() at fork_exit+0xc3
fork_trampoline() at fork_trampoline+0xe
--- trap 0,rip = 0, rsp = 0xffffffffb72b4d00, rbp = 0 ---
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