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NNTP-Posting-Date: Wed, 29 Jul 2026 20:15:25 +0000
From: steve g <Sgonedes1977@gmail.com>
Newsgroups: comp.lang.lisp
Subject: Re: Resources to learn common lisp?
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tfb <tfb@work.it.out> writes:

> Lawrence D´Oliveiro <ldo@nz.invalid> wrote:
>
>> Have they come up with any excuses as to why OS kernels don’t use
>> garbage collection?
>> 
>
> Here is why: they're written either in C or in languages which must be
> memory & call compatible with C.  It is essentially impossible to implement
> a garbage collector in C.  There is a famous counterexample: the Boehm GC. 
> It would probably be possible to use that in an OS kernel written in C but
> I expect it would be very hard to retrofit it to an existing kernel.  It's
> also (because C) not a copying collector.

thank god for vfork. The use of  ``C++ for the linux kernel'' is really a very old
topic of discussion, please leave it alone.

> C was a deeply appropriate language to write an OS for the PDP-11.  At
> every point since then there's been the choice of continuing to use C and
> either a port of that OS or an implementation of a compatible OS or of
> implementing a new, incompatible, OS.  For at least 30 years there's really
> only been one answer to that question.  And so, today, by a series of
> perfectly reasonable choices, we've ended up with a vast OS implemented in
> a language which is now deeply inappropriate.
>
> Sadly we've also ended up with programmers who think the machines they
> program for are giant PDP-11s, and as a result machines which spend a huge
> amount of effort pretending to be giant PDP-11s.
>
> It's all a tragedy.

you are an insult.