find_fast_cwd: WARNING: Couldn't compute FAST_CWD pointer 的问题有待解决

国外有同样问题的出现者，但无给出具体解决方法，我认为与兼容性有关。

Shark@Lau /home/dummynet/ipfw3-2012/binary
$ ./ipfw.exe -h
      0 [main] ipfw 15148 find_fast_cwd: WARNING: Couldn't compute FAST_CWD poin                                                                                                                ter.  Please report this problem to
the public mailing list [e-mail]
ipfw syntax summary (but please do read the ipfw(8) manpage):


        ipfw [-abcdefhnNqStTv] <command>


where <command> is one of the following:


add [num] [set N] [prob x] RULE-BODY
{pipe|queue} N config PIPE-BODY
[pipe|queue] {zero|delete|show} [N{,N}]
nat N config {ip IPADDR|if IFNAME|log|deny_in|same_ports|unreg_only|reset|
                reverse|proxy_only|redirect_addr linkspec|
                redirect_port linkspec|redirect_proto linkspec}
set [disable N... enable N...] | move [rule] X to Y | swap X Y | show
set N {show|list|zero|resetlog|delete} [N{,N}] | flush
table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}
table all {flush | list}


RULE-BODY:      check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]
ACTION: check-state | allow | count | deny | unreach{,6} CODE |
               skipto N | {divert|tee} PORT | forward ADDR |
               pipe N | queue N | nat N | setfib FIB | reass
PARAMS:         [log [logamount LOGLIMIT]] [altq QUEUE_NAME]
ADDR:           [ MAC dst src ether_type ]
                [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]
                [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]
IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }
IP6ADDR:        [not] { any | me | me6 | ip6/bits | IP6LIST }
IP6LIST:        { ip6 | ip6/bits }[,IP6LIST]
IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]
OPTION_LIST:    OPTION [OPTION_LIST]
OPTION: bridged | diverted | diverted-loopback | diverted-output |
        {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |
        {dst-port|src-port} LIST |
        estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |
        iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |
        ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |
        icmp6types LIST | ext6hdr LIST | flow-id N[,N] | fib FIB |
        mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |
        setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |
        tcpdatalen LIST | verrevpath | versrcreach | antispoof


Shark@Lau /home/dummynet/ipfw3-2012/binary
$ ./ipfw -f flush
      0 [main] ipfw 11424 find_fast_cwd: WARNING: Couldn't compute FAST_CWD poin                                                                                                                ter.  Please report this problem to
the public mailing list [e-mail]
ipfw: socket: No error
my_socket failed 2, cannot talk to kernel module

具体解决方法即将给出。