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Fri Sep 8 13:08:39 EDT 2017 · https://mail.python.org/pipermail/python-dev/2017-September/149379.html

On Fri, 8 Sep 2017 10:03:33 -0700
Nick Coghlan <ncoghlan at gmail.com> wrote:

> On 8 September 2017 at 08:05, Antoine Pitrou <solipsis at pitrou.net> wrote:
> >
> > Hello,
> >
> > I've written a PEP by which you can tell the GC to run in a dedicated
> > thread.  The goal is to solve reentrancy issues with finalizers:
> > https://www.python.org/dev/peps/pep-0556/  
> 
> +1 from me for the general concept. (Minor naming idea: "inline" may
> be a clearer name for the current behaviour).
> 
> One point that seems worth noting: even with cyclic GC moved out to a
> separate thread, __del__ methods and weakref callbacks triggered by a
> refcount going to zero will still be called inline in the current
> thread.

You're right, that bears mentioning.  It's much less of a problem,
of course, since such calls happen at deterministic places.

Regards

Antoine.

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[Python-Dev] PEP 556: Threaded garbage collection