uvm_fault(fffffd800d3947c0,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff800036fceb50,200000000440) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff800036fceb50) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7c14746ea7c0, count: -18
ddb{0}> machine ddbcpu 1
Stopped at      savectx+0xae:   movl    $0,%gs:0x688
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7f4066afe330, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7f4066afe330, count: -1