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

[Eli Zaretskii]

> From: Trevor Bentley <trevor@trevorbentley.com>
> Cc: michael_heerdegen@web.de, monnier@iro.umontreal.ca, carlos@redhat.com,
>  fweimer@redhat.com, 43389@debbugs.gnu.org, bugs@gnu.support, dj@redhat.com
> Cc: 
> Date: Sun, 13 Dec 2020 21:41:40 +0100
> 
> > Does thread-last-error return something non-nil? 
> 
> Nope, nil in all instance, including the one in a weird state.

Then it's unlikely that a thread died unnatural death.

> I'm running one instance with printfs in some of the 
> unblock_input() functions, and one in gdb with breakpoints on 
> Fmake_thread, pthread_create, and emacs_abort.  If you have other 
> suggested probe points, I'm happy to test.

A breakpoint in watch_gc_cons_percentage, perhaps, to see if and when
the threshold gets changed?