From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Matt Armstrong Newsgroups: gmane.emacs.devel Subject: Re: New GC concept Date: Mon, 07 Jun 2021 10:32:01 -0700 Message-ID: <874ke9h97y.fsf@rfc20.org> References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37900"; mail-complaints-to="usenet@ciao.gmane.io" To: Daniel Colascione , emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Jun 07 19:52:22 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lqJQE-0009gn-6P for ged-emacs-devel@m.gmane-mx.org; Mon, 07 Jun 2021 19:52:22 +0200 Original-Received: from localhost ([::1]:42174 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lqJQC-0006rE-C0 for ged-emacs-devel@m.gmane-mx.org; Mon, 07 Jun 2021 13:52:20 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:38150) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lqJ6l-0002k1-8F for emacs-devel@gnu.org; Mon, 07 Jun 2021 13:32:16 -0400 Original-Received: from relay11.mail.gandi.net ([217.70.178.231]:57413) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lqJ6h-0005Hl-Ci for emacs-devel@gnu.org; Mon, 07 Jun 2021 13:32:15 -0400 Original-Received: (Authenticated sender: matt@rfc20.org) by relay11.mail.gandi.net (Postfix) with ESMTPSA id B0FCD100003; Mon, 7 Jun 2021 17:32:06 +0000 (UTC) Original-Received: from matt by mdeb with local (Exim 4.94.2) (envelope-from ) id 1lqJ6X-0002CM-TQ; Mon, 07 Jun 2021 10:32:01 -0700 In-Reply-To: Received-SPF: pass client-ip=217.70.178.231; envelope-from=matt@rfc20.org; helo=relay11.mail.gandi.net X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:270531 Archived-At: Daniel Colascione writes: > Emacs has had the same GC for a decent amount of time now (since the > 1980s, really). I spent some time in 2020 rewriting it from scratch. I > haven't had time to work on the new GC recently, but I figure I'd throw > it out here to get some feedback on the general concept. > > Check out > https://github.com/dcolascione/emacs-1/blob/newgc-wip/src/alloc.c, > specifically the big doc comment on top Hey Daniel, I am no GC expert but I'm liking this a lot. I love the block comments in your alloc.c -- very clear and easy to understand. You're in a uniquely good position to work on this. I hope you continue! I'm curious about the answer to one of the unanswered questions in your alloc.c FAQ: What about systems without virtual memory? Asked another way: can we reasonably expect to entirely replace the current GC with this new one? Are there platforms Emacs supports today that would be left behind?