From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: When should ralloc.c be used? Date: Mon, 24 Oct 2016 09:59:34 +0300 Message-ID: <83funm5j1l.fsf@gnu.org> References: <838ttyhhzu.fsf@gnu.org> <871szqwu51.fsf@users.sourceforge.net> <831szqhbc2.fsf@gnu.org> <87d1itt79z.fsf_-_@users.sourceforge.net> <7baa18d4-2b09-caa8-005e-29008a383ad1@cs.ucla.edu> <83mvhwrgd5.fsf@gnu.org> <8539f38f-9a11-44c3-4de7-bb974c96206c@cs.ucla.edu> <838ttfnmev.fsf@gnu.org> <837f8znk8f.fsf@gnu.org> <83zilvm2ud.fsf@gnu.org> <83r377m0i8.fsf@gnu.org> <83eg36n6v5.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1477292438 5842 195.159.176.226 (24 Oct 2016 07:00:38 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 24 Oct 2016 07:00:38 +0000 (UTC) Cc: emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Oct 24 09:00:30 2016 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1byZFE-0000B9-6m for ged-emacs-devel@m.gmane.org; Mon, 24 Oct 2016 09:00:28 +0200 Original-Received: from localhost ([::1]:44938 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1byZFF-0007sc-Lf for ged-emacs-devel@m.gmane.org; Mon, 24 Oct 2016 03:00:29 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:34788) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1byZES-0007px-Uf for emacs-devel@gnu.org; Mon, 24 Oct 2016 02:59:41 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1byZEP-0003pY-MF for emacs-devel@gnu.org; Mon, 24 Oct 2016 02:59:41 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:43862) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1byZEP-0003pU-JL; Mon, 24 Oct 2016 02:59:37 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:1355 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1byZEO-0007In-SL; Mon, 24 Oct 2016 02:59:37 -0400 In-reply-to: (message from Stefan Monnier on Sun, 23 Oct 2016 16:44:10 -0400) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:208658 Archived-At: > From: Stefan Monnier > Date: Sun, 23 Oct 2016 16:44:10 -0400 > > >> I don't think it matters very much since we use mmap for the buffers, > > No, we don't, not on GNU/Linux anyway. > > AFAIK the decision not to use mmap was due to the fact that glibc's > malloc itself uses mmap. But if we don't use glibc's malloc, then why > wouldn't we decide to use mmap ourselves for the buffers? I already asked that: http://lists.gnu.org/archive/html/emacs-devel/2016-10/msg00678.html The only answer was disappointing: I don't know, and would rather not spend time investigating. It looks like either people don't realize what a land mine we just stepped on, or they simply don't care enough. Does it make sense to anyone to release Emacs 25.2 that doesn't work reliably on recent GNU/Linux systems? Because that's what is going to happen if we don't invest all the resources we have into solving this.