Re: MPS: User GC customizations

["Gerd Möllmann" <gerd.moellmann@gmail.com>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Pip Cet <pipcet@protonmail.com>
>> I'm really confused. Can you explain what you think the difference
>> is?

FWIW, I'm also confused.

> I just did, twice.  If that still doesn't explain it, then I guess my
> explanatory talents betray me, and I don't know what else to say.
>
>> The variable's value is a number. If the variable is zero, we don't
>> tell MPS we're idle when we're idle. If it's nonzero, we tell it
>> we're idle (when we are), and how much time it's okay to spend in GC.
>
> The number can only tell one thing, not two.  AFAIU, it tells the
> latter: "how much time it's okay to spend in GC" once GC started due
> to idleness (and not some other reason).  Gerd said something
> different: that this number "gives MPS notice" that Emacs is idle.
> (How can a number "give notice" I don't understand even in principle.)

By saying that 0 has a special meaning.

The "once GC started due to idleness" confuses me. We don't "start" GC
due to idleness. We allow MPS to do something concurrently, say one or
more increments in the sense of its incremental GC algorithm. And "GC
runs" all the time.