[OpenAFS] kernel Oops - easy to reproduce

[Derek Atkins]

This is a "known bug".  The workaround is "don't start afs if /afs
doesn't exist".

A patch is in the works to cause afsd to error-out early if /afs
doesn't exist.

-derek

Marc Schmitt <schmitt@inf.ethz.ch> writes:

> Hi all,
> 
> Maybe this has been reported yet:
> 
> I`m using RedHat 7.1 with OpenAFS 1.2.2-rh7.1.1, tried with several
> kernels (2.4.9-6, 2.4.9-12, 2.4.9-21, 2.4.17). NIC is an eepro100.
> 
> To create a kernel Oops, simply do the following:
> - /etc/rc.d/init.d/afs stop (AFS shuts down properly)
> - rmdir /afs
> - /etc/rc.d/init.d/afs start
> (Found libafs-2.4.9-21.o from SymTable... Loading...
> Starting AFS services.....
> afsd: All AFS daemons started.
> afsd: Can't mount AFS on /afs(2))
> - lsmod shows libafs-2.4.9-21       396768   0  (unused)
> - rmmod libafs-2.4.9-21 (Oops)
> 
> The machine won`t recover properly, trying to start AFS in this state
> gives on my machine the following:
> 
>   10:20am  up 18:00,  3 users,  load average: 6.98, 2.58, 0.93
> 86 processes: 75 sleeping, 10 running, 1 zombie, 0 stopped
> CPU states:  0.5% user, 99.4% system,  0.0% nice,  0.0% idle
> Mem:   255124K av,  207560K used,   47564K free,       0K shrd,
> 16656K buff
> Swap:  530104K av,       0K used,  530104K free
> 87664K cached
> 
>    PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
> 10497 root      20 -10   776  776   764 R <  15.7  0.3   0:18 afsd
> 10494 root      14   0   776  776   768 R    11.8  0.3   0:13 afsd
> 10496 root      14   0   776  776   772 R    11.8  0.3   0:13 afsd
> 10498 root      14   0   776  776   772 R    11.8  0.3   0:13 afsd
> 10499 root      14   0   776  776   772 R    11.8  0.3   0:13 afsd
> 10500 root      14   0   776  776   772 R    11.8  0.3   0:13 afsd
> 10501 root      14   0   776  776   772 R    11.8  0.3   0:13 afsd
> 10502 root      14   0   776  776   772 R    11.8  0.3   0:13 afsd
> 
> 
> Regards,
> 	Marc
> 
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-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord@MIT.EDU                        PGP key available