panic: pmap_demote_pde: page table page for a wired mapping is missing cpuid = 0 time = 187 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00212ac680 vpanic() at vpanic+0x1e0/frame 0xfffffe00212ac6e0 panic() at panic+0x43/frame 0xfffffe00212ac740 pmap_demote_pde_locked() at pmap_demote_pde_locked+0x1288/frame 0xfffffe00212ac810 pmap_unwire() at pmap_unwire+0x338/frame 0xfffffe00212ac890 vm_map_unwire() at vm_map_unwire+0x878/frame 0xfffffe00212ac940 kern_munlock() at kern_munlock+0x9b/frame 0xfffffe00212ac980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe00212acab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00212acab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp = 0x7fffdfffdf38, rbp = 0x2 --- KDB: enter: panic [ thread pid 40213 tid 101125 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why