uvm_fault(fffffd8069f22cf0,717fc64d000,0,2) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:601
upageflttrap(ffff80002e4ba870,717fc64d000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002e4ba870) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffc33e0, count: -16
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(fffffd8059702c50,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline]
witness_checkorder(fffffd8059702c50,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105
rw_enter(fffffd8059702c40,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250
rrw_enter(fffffd8059702c40,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:465
VOP_LOCK(fffffd8063efe7b8,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
vn_lock(fffffd8063efe7b8,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:564
uvn_io(fffffd8069778b80,ffff80002e4ae060,2,2b,1) at uvn_io+0x338 sys/uvm/uvm_vnode.c:1234
uvm_pager_put(fffffd8069778b80,fffffd8007b0b860,ffff80002e4ae0f8,ffff80002e4ae138,2b,0,ff19aabb3f618a9a) at uvm_pager_put+0x137 sys/uvm/uvm_pager.c:545
uvn_flush(fffffd8069778b80,0,2000,b) at uvn_flush+0x532 sys/uvm/uvm_vnode.c:722
uvm_map_clean(fffffd8069f22a10,20000000,20002000,b) at uvm_map_clean+0x72b sys/uvm/uvm_map.c:4540
syscall(ffff80002e4ae330) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4ae330) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x361e6646a40, count: -12