Creation of carp interface on amd64 spins

[Christopher Chen]

On 9/20/07, Max Laier <max at love2party.net> wrote:
> On Thursday 20 September 2007, Christopher Chen wrote:
> > Hi:
> >
> > I'm running 6.2-RELEASE on some Pentium D's running and amd64 port.
> >
> > I'm doing some mildly interesting things with vlan tagging, etc, and I
> > want to also set up carp. On identical machines running the i386 port,
> > this works correctly, but when running
> >
> > ifconfig carp0
> >
> > For instance, the process just spins and can't be killed. The rest of
> > the machine is fine, though!
> >
> > This is 6.2-RELEASE/amd64 running in SMP mode.
> >
> > Any ideas?
>
> Can you tell me what "^T" or ps gives for the spinning process?  Does it
> hang in userland or kernel?  Can you try to trace the ifconfig, or - if
> the hang is in the kernel - break into the kernel debugger and get a back
> trace for the process?

Max:

load: 1.62  cmd: ifconfig 920 [runnable] 0.00u 96.02s 98% 920k

That's what ^T says. I'm going to reboot and ktrace it now. So here's
the last few lines of the ktrace:

   944 ifconfig CALL  modstat(0x10a,0x7fffffffe280)
   944 ifconfig RET   modstat 0
   944 ifconfig CALL  modfnext(0x10a)
   944 ifconfig RET   modfnext 267/0x10b
   944 ifconfig CALL  modstat(0x10b,0x7fffffffe280)
   944 ifconfig RET   modstat 0
   944 ifconfig CALL  socket(0x2,0x2,0)
   944 ifconfig RET   socket 3
   944 ifconfig CALL  ioctl(0x3,SIOCIFCREATE,0x514ce0)

l# lsof -p 944
COMMAND  PID USER   FD   TYPE             DEVICE SIZE/OFF  NODE NAME
ifconfig 944 root  cwd   VDIR               0,77      512 16525 /root
ifconfig 944 root  rtd   VDIR               0,77      512     2 /
ifconfig 944 root  txt   VREG               0,77    80296    48 /sbin/ifconfig
ifconfig 944 root  txt   VREG               0,77   192688   116
/libexec/ld-elf.so.1
ifconfig 944 root  txt   VREG               0,77     7424 24794 /lib/libipx.so.3
ifconfig 944 root  txt   VREG               0,77  1083208 24786 /lib/libc.so.6
ifconfig 944 root    0u  VCHR               0,93   0t2101    93 /dev/ttyp0
ifconfig 944 root    1u  VCHR               0,93   0t2101    93 /dev/ttyp0
ifconfig 944 root    2u  VCHR               0,93   0t2101    93 /dev/ttyp0
ifconfig 944 root    3u  IPv4 0xffffff002d459130      0t0   UDP *:*

Sorry I don't have physical access so I can't break into the kernel
debugger right now.

cc

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-- 
Chris Chen <muffaleta at gmail.com>
"I want the kind of six pack you can't drink."
-- Micah