From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Collecting markers with MPS Date: Wed, 24 Apr 2024 13:22:09 +0300 Message-ID: <86o79z2h7y.fsf@gnu.org> References: <87cyqfjk6n.fsf@gmail.com> <86sezb2oj2.fsf@gnu.org> <874jbrjg04.fsf@gmail.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31104"; mail-complaints-to="usenet@ciao.gmane.io" Cc: gerd.moellmann@gmail.com, emacs-devel@gnu.org To: Helmut Eller Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Apr 24 12:23:23 2024 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 1rzZmc-0007n6-Bn for ged-emacs-devel@m.gmane-mx.org; Wed, 24 Apr 2024 12:23:22 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rzZly-0004ld-13; Wed, 24 Apr 2024 06:22:42 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rzZlt-0004lM-5J for emacs-devel@gnu.org; Wed, 24 Apr 2024 06:22:37 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rzZls-0004Uv-NI; Wed, 24 Apr 2024 06:22:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=DwkL73GX3NB8DZT9SG+YKNu6GdUcQE7afHddxCxrNyA=; b=Mt4U795W+/rH r/O68pz21jmYIicKsmO3ES3LAcfnkDT5nhR93U6D0OiyVV+i0rDlS8YJD/IHAczPI8tFSIRuhkP9D 3t1BEieoos7hAjPnkjj46CSRISlYdoFAk/JWO5F9+7fXX1iAcKyzCpVZHcO6/e8F6SiZ/ez7Em/YG 82DFVpbyyPhCwZ/8bwa9/mNc1nXkvtPr05zesreFOb//ijPTRZhtXjhqi8VssartpTeQA11kyoNty wgeWeHyx81fPccC3ovmOHJXSzsnAsP/X1P2SP017Z72uIqYm9AqemDER4oXKJ8Nr+wVThADsePQa0 bbsS+CTarrTVrEUrnbl77A==; In-Reply-To: <874jbrjg04.fsf@gmail.com> (message from Helmut Eller on Wed, 24 Apr 2024 10:56:27 +0200) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:318025 Archived-At: > From: Helmut Eller > 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?