bug#43389: 28.0.50; Emacs memory leaks using hard disk all time

[Eli Zaretskii]

> From: Trevor Bentley <trevor@trevorbentley.com>
> Cc: carlos@redhat.com, bugs@gnu.support, fweimer@redhat.com,
>  43389@debbugs.gnu.org, dj@redhat.com, michael_heerdegen@web.de
> Cc: 
> Date: Thu, 26 Nov 2020 16:19:53 +0100
> 
> I've just hooked make-process and make-thread, and see both being 
> called back-to-back very often for spawning curl subprocesses.

What Lisp commands cause make-thread to be called?