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SubjectHardware limits on numbers of threads?
http://people.redhat.com/drepper/glibcthreads.html says:

> Hardware restrictions put hard limits on the number of
> threads the kernel can support for each process.
> Specifically this applies to IA-32 (and AMD x86_64) where the thread
> register is a segment register. The processor architecture
> puts an upper limit on the number of segment register values
> which can be used (8192 in this case).

Is this true? Where does the limit come from?
- Dan
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