Subj : Linux NPTL anomally
To   : comp.programming.threads
From : dmarkh
Date : Wed Sep 28 2005 02:51 am

I'm not sure this is the proper place to ask about this but since the
anomally I see does not happen when I build and run my app using
LinuxThreads (export LD_ASSUME_KERNEL=2.4.10), I figure it's better
here than the kernel list.

I have a multi threaded app. The app is running and all the threads
have started and are sleeping. The main process calls a function in a
kernel module that among other things, registers the main processes pid
via "pid = current->pid".  Later at program exit time, the main
sequentially causes all the threads to exit. Then in during some
cleanup code, calls another function in that same kernel module and
again registers his process id via "pid = current->pid". The anomally
is, this last "current->pid" does not have the main process id. It has
the tid of one of my threads that has long since exited. Not only have
all my threads exited, none of them calls or has called any function
within in this kernel module. ????

I understand (sort of) the differences between LinuxThreads and NTPL
but they do not explain this anomally. Bug??

Thanks 
Mark

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