Process hang with 2.6.6-rc1

From: Shantanu Goel
Date: Fri Apr 16 2004 - 21:08:57 EST


I have been experiencing process hangs since upgrading
to 2.6.6-rc1. The system is usually able to stay up
for a day before the hang. But it is quite consistent
in that it always hangs. I experienced the same hang
with 2.6.5-bk1 as well. In the thread traces, it
looks as though the mmap_sem of pid 3960 (pan) is not
being released preventing any other process from
locking the address space. This is readily apparent
from the hung "ps" command. It is trying to read
Any clues would be appreciated as I have not been able
to make any headway in debugging this. My hardware
information is below and I have attached the sysrq-t
output and .config.


Kernel version: 2.6.6-rc1 SMP
Hardware Info: Dell PE1600SC with 2x2Ghz Xeon CPUs


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