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.bugs Subject: bug#43389: 28.0.50; Emacs memory leaks Date: Tue, 10 Nov 2020 17:53:36 +0200 Message-ID: <83blg52oov.fsf@gnu.org> References: <87r1r5428d.fsf@web.de> <87mu1sry72.fsf@mail.linkov.net> <875z8fc224.fsf@web.de> <20200915175418.GV20869@maokai> <838sda98jm.fsf@gnu.org> <20200915211209.GW20869@maokai> <83pn6l7ozj.fsf@gnu.org> <20200917204704.GA20217@maokai> <83zh5n4hpd.fsf@gnu.org> <878sbagsx8.fsf@web.de> <87imaefck8.fsf@web.de> <87wnyudws1.fsf@web.de> <83pn4l3mts.fsf@gnu.org> <87v9edk4eb.fsf@igel.home> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="14467"; mail-complaints-to="usenet@ciao.gmane.io" Cc: michael_heerdegen@web.de, 43389@debbugs.gnu.org, RLAdams@AdamsInfoServ.Com To: Andreas Schwab Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Nov 10 16:54:11 2020 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 1kcVyE-0003fw-T6 for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 10 Nov 2020 16:54:10 +0100 Original-Received: from localhost ([::1]:37736 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kcVyD-0003g6-O2 for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 10 Nov 2020 10:54:09 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:57734) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kcVy6-0003fr-IC for bug-gnu-emacs@gnu.org; Tue, 10 Nov 2020 10:54:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:55389) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kcVy6-0000hD-8x for bug-gnu-emacs@gnu.org; Tue, 10 Nov 2020 10:54:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kcVy6-0006Wc-6h for bug-gnu-emacs@gnu.org; Tue, 10 Nov 2020 10:54:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 10 Nov 2020 15:54:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 43389 X-GNU-PR-Package: emacs Original-Received: via spool by 43389-submit@debbugs.gnu.org id=B43389.160502361925052 (code B ref 43389); Tue, 10 Nov 2020 15:54:02 +0000 Original-Received: (at 43389) by debbugs.gnu.org; 10 Nov 2020 15:53:39 +0000 Original-Received: from localhost ([127.0.0.1]:38702 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kcVxi-0006W0-Ol for submit@debbugs.gnu.org; Tue, 10 Nov 2020 10:53:39 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:57550) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kcVxh-0006Vo-OP for 43389@debbugs.gnu.org; Tue, 10 Nov 2020 10:53:38 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:34852) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kcVxb-0000XQ-FQ; Tue, 10 Nov 2020 10:53:31 -0500 Original-Received: from [176.228.60.248] (port=1678 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kcVxW-00044m-IF; Tue, 10 Nov 2020 10:53:27 -0500 In-Reply-To: <87v9edk4eb.fsf@igel.home> (message from Andreas Schwab on Tue, 10 Nov 2020 09:22:20 +0100) 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:193028 Archived-At: > From: Andreas Schwab > Cc: Michael Heerdegen , 43389@debbugs.gnu.org, > RLAdams@AdamsInfoServ.Com > Date: Tue, 10 Nov 2020 09:22:20 +0100 > > > Yes, the heap. So it more and more looks like this is the result of > > glibc not releasing memory to the system, which with some usage > > patterns causes the memory footprint grow to ludicrous size. > > The heap can only shrink if you free memory at the end of it, so there > is nothing wrong here. Yes. Except that some people say once this problem starts, the memory footprint starts growing very fast, and the question is why. Also, perhaps Emacs could do something to prevent large amounts of free memory from being trapped by a small allocation, by modifying something in how we allocate memory. (It is a pity that a problem which was solved decades ago by using ralloc.c is back, and on GNU/Linux of all the platforms, where such aspects of memory fragmentation aren't supposed to happen, and all the malloc knobs we could perhaps use to avoid that were deprecated and/or removed.)