[Jfs-discussion] 2.4.20 + JFS 1.1.2 stops responding

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Reproduceable problem where vanilla 2.4.20 with JFS and 2.4.20 + JFS 
1.1.2 stop responding after several hours (<8) of heavy file activity. 
By stops responding I mean I cannot enter any commands at the prompt
or establish new login sessions. There are no errors to the console or 
in the logs after a reboot. The machine will still ping and switch 
between virtual consoles while in this state, but no commands can be 
entered at the prompt. Sysreq and ctrl-alt-del don't work as well. 
This has been observed on a Dell Power Edge 1650 single processor server 
and a Dell Inspiron 8000 notebook. I have not been able to reproduce 
this with EXT2 (at least not yet). I can reproduce the problem by
starting a couple of instances of this script in different directories
on a JFS filesystem:

#!/bin/sh
while [ true ]
do
  i=0
  while [ $i -lt 10000 ]
  do
    myrand=`expr $RANDOM / 128`
    echo c$i
    dd if=/dev/zero of=$i.tdh bs=1k count=$myrand > /dev/null 2>&1
    i=`expr $i + 1`
  done
  find . -name "*.tdh" -exec rm {} \;
done

It appears the hangup may be at the "find" command since the last thing
printed to the console is always c9999. After a reboot I ran jfs_fsck
and didn't see anything unusual, the exit code was 1. 

Any ideas?

Thanks.

--
Thomas Hays
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