From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#45200: Memory leaks: (garbage-collect) fails to reclaim memory Date: Sun, 24 Jan 2021 14:12:20 -0500 Message-ID: References: <2a4f3f31f30db28387055821a8edf44fd1d66ea5.camel@yandex.ru> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="5648"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 45200@debbugs.gnu.org To: Konstantin Kharlamov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Jan 24 20:13:12 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1l3koy-0001Lm-2W for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 24 Jan 2021 20:13:12 +0100 Original-Received: from localhost ([::1]:33604 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l3kow-0003ri-Kt for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 24 Jan 2021 14:13:10 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:57894) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l3koo-0003rN-8E for bug-gnu-emacs@gnu.org; Sun, 24 Jan 2021 14:13:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:53995) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1l3kon-0004lR-Vw for bug-gnu-emacs@gnu.org; Sun, 24 Jan 2021 14:13:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1l3kon-0002J6-R5 for bug-gnu-emacs@gnu.org; Sun, 24 Jan 2021 14:13:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 24 Jan 2021 19:13:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 45200 X-GNU-PR-Package: emacs Original-Received: via spool by 45200-submit@debbugs.gnu.org id=B45200.16115155588840 (code B ref 45200); Sun, 24 Jan 2021 19:13:01 +0000 Original-Received: (at 45200) by debbugs.gnu.org; 24 Jan 2021 19:12:38 +0000 Original-Received: from localhost ([127.0.0.1]:37308 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1l3koP-0002IV-Q0 for submit@debbugs.gnu.org; Sun, 24 Jan 2021 14:12:37 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:61613) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1l3koO-0002IF-Fe for 45200@debbugs.gnu.org; Sun, 24 Jan 2021 14:12:36 -0500 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 86AD044061A; Sun, 24 Jan 2021 14:12:30 -0500 (EST) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id DBB8A44059C; Sun, 24 Jan 2021 14:12:21 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1611515541; bh=hyRyxFPMOW0abSrju6coe8g1J4SJN+WSdbhe1fOKa+E=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=iZMVQbuzPvcpqu1NbhlQzQDjAsPEsepHnTkzerXDDMun5vuQbQkFItoKRVA+5jY9k iKTQ8tuV/kk38NAbt476fyXq093JiCYEAiWBSpEQv8I87tADHv03dKmhvsGKHd8hSd X/y0doBWbxXxfsT2SqQWpXzSDPrJCNSBZQe/PSRCL7MW87XKiMQu57NB5YkYPcECeH gFAkfrbmBqPsCSgZGvnGaW23EAGfrFKY8PKP3nTHJPZzaEwKByRFL4Us1FQoY/a13x xAonBlacVRueoRAscDppisS7yqngXvg4RDvQB9em3zv2+OWeGHxgpG7ghfUc3JdlJ7 iNKrzAKyMavHw== Original-Received: from alfajor (69-196-141-46.dsl.teksavvy.com [69.196.141.46]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id AC7CA1202B6; Sun, 24 Jan 2021 14:12:21 -0500 (EST) In-Reply-To: <2a4f3f31f30db28387055821a8edf44fd1d66ea5.camel@yandex.ru> (Konstantin Kharlamov's message of "Sun, 24 Jan 2021 22:00:31 +0300") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:198517 Archived-At: > I'm fine with Emacs possibly keeping a dozen of megabytes for personal > use. The problem though is that the issue easily manifests itself in > hundreds of megabytes, as can be seen with the testcase marked as "Message > #11" in web-ui. I don't think the exact number matters: you were willing to make use of *any* amount of extra memory by delaying all GC until idle time. The fact that the GC you finally do after that long wait doesn't recover that memory is not a failure in my book: there's no reason Emacs or glibc should presume that you won't be reusing just as much heap space before the next GC. IOW in my book, you got what you asked for ;-) BTW, I wish `malloc_trim` could be passed an argument that says something like "release about half of the free memory", which would provide a better balance between "hoard free memory indefinitely" and "constantly free&reallocate memory from the OS". Also, the manpage of mallopt suggests that glibc should automatically do the trim on its own every once in a while anyway, so maybe the problem won't be solved by `malloc_trim`. Stefan