Re: Collecting markers with MPS

[Eli Zaretskii]

> From: Helmut Eller <eller.helmut@gmail.com>
> Cc: gerd.moellmann@gmail.com,  emacs-devel@gnu.org
> Date: Wed, 24 Apr 2024 10:56:27 +0200
> 
> On Wed, Apr 24 2024, Eli Zaretskii wrote:
> 
> And I was hoping you would say: "We don't need to collect markers.  It's
> a nicety that was easy to do in the old GC.  If it's not easy in the new
> GC, leave it out".

Can we really do that?  I don't think so, but maybe I'm missing
something.

> How would the main thread know that a marker is not referenced from
> anywhere else than from the undo-list?  Are you saying the main thread
> should still do some marking as the old GC did, so that it can make the
> decisions on the same mark bits?

Can't the new GC tell us which markers are unreferenced?