uvm_fault(fffffd806cc24018,198461c000,0,2) at uvm_fault+0x238
upageflttrap(ffff80002e4e89c0,198461c228) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002e4e89c0) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end trace frame: 0x0, count: -17
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
witness_checkorder(fffffd807052f098,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline]
witness_checkorder(fffffd807052f098,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105
rw_enter(fffffd807052f088,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250
rrw_enter(fffffd807052f088,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:465
VOP_LOCK(fffffd8068297cc8,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
vn_lock(fffffd8068297cc8,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:564
uvn_io(fffffd8068dfa068,ffff8000265cc4e0,1,2b,1) at uvn_io+0x338 sys/uvm/uvm_vnode.c:1221
uvm_pager_put(fffffd8068dfa068,fffffd80073fc0c0,ffff8000265cc578,ffff8000265cc5b8,2b,0,b6a1cc0ac33f22b2) at uvm_pager_put+0x137 sys/uvm/uvm_pager.c:545
uvn_flush(fffffd8068dfa068,0,13000,b) at uvn_flush+0x532 sys/uvm/uvm_vnode.c:709
uvm_map_clean(fffffd805bc7b1a0,20000000,20400000,b) at uvm_map_clean+0x72b sys/uvm/uvm_map.c:4540
syscall(ffff8000265cc7b0) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff8000265cc7b0) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x8f81f552be0, count: -12