uvm_fault(0xfffffd805dbfe5e8, 0x1a40, 0, 2) -> e
fatal page fault in supervisor mode
trap type 6 code 2 rip ffffffff81fe8227 cs 8 rflags 50202 cr2 1a40 cpl 0 rsp ffff8000354b9310
gsbase 0xffffffff8380dff0  kgsbase 0x0
panic: trap type 6, code=2, pc=ffffffff81fe8227
Starting stack trace...
panic(ffffffff8339b0e1) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff8000354b9260) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x57
syscall(ffff8000354b96a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000354b96a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xcd1e06d3680, count: 251
End of stack trace.

dump to dev 4,1 not possible