uvm_fault(fffffd806c015d40,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1
kpageflttrap(ffff80002b4eb010,200000001680) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff80002b4eb010) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x57
syscall(ffff80002b4eb240) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002b4eb240) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6793139dec0, count: -25
ddb{0}> machine ddbcpu 1
Stopped at      savectx+0xae:   movl    $0,%gs:0x680
savectx() at savectx+0xae
end of kernel
end trace frame: 0x766efb48fcc0, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x766efb48fcc0, count: -1