Zombie process with preemptible enabled.

[Gerardo Exequiel Pozzi]

Hi people,

Since i starting to testing 2.6 and recently mm and -ck, i see that Mozilla/Mozilla Firebird
(diferent versions) launch a netstat child that when finalize, it remain zombie. It only happens
when preemptible option is enabled.

The kernel version has tested is:
2.6.0-test[12345]
2.6.0-test5-mm4
2.4.22-ck2.

For example:
456 ?        S      0:00 /bin/sh /usr/local/lib/mozilla-1.5a/run-mozilla.sh /u
463 ?        S      0:48  \_ /usr/local/lib/mozilla-1.5a/MozillaFirebird-bin
490 ?        Z      0:00      \_ [netstat <defunct>]

The file /proc/490/wchan shows do_exit.

Closing Mozilla kill the zombie.

more info need?

http://www.vmlinuz.com.ar/slackware/kernel.config.djgera/config-2.4.22-ck2
http://www.vmlinuz.com.ar/slackware/kernel.config.djgera/config-2.6.0-test5
http://www.vmlinuz.com.ar/slackware/kernel.config.djgera/config-2.6.0-test5-mm4

Disabling preemptible solves the problem in all cases.

chau,
 djgera


-- 
Gerardo Exequiel Pozzi ( djgera )
http://www.vmlinuz.com.ar http://www.djgera.com.ar
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