For what it's worth:
Today I helped Jens track down a problem under FreeBSD where Zope was
crashing rendering a page which rendered successfully on other systems.
It turns out that the default stack size for a thread under FreeBSD is
64K, and that's not enough stack space to render this particular page of
his (a Tracker page) -- most likely due to changes with how the
RestrictedPython compiler is used/invoked by DTML processing, since this
represents a big change from Zope 2.3.
The solution we used was modifying Python/thread_pthread.h and the
PyThread_start_new_thread function; specifically, instead of using a
(pthread_attr_t *) NULL, we made a new attribute instead:
and using &pta in the thread creation function rather than NULL.
Recompiling Python 2.1 with changes gives it a 128K stack per thread,
which seemed sufficient to render the Tracker page in question.
Does anyone know of a better way to tune thread stack sizes on FreeBSD?
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