From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: GC: cons sweeping and cons block size Date: Thu, 05 Jul 2007 10:06:21 -0400 Message-ID: References: <468B4194.000005.15879@pantene.yandex.ru> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1183644397 10841 80.91.229.12 (5 Jul 2007 14:06:37 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Thu, 5 Jul 2007 14:06:37 +0000 (UTC) Cc: jyavner@member.fsf.org, emacs-devel@gnu.org To: dmantipov@yandex.ru Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Jul 05 16:06:32 2007 connect(): Connection refused Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1I6Rya-0007iH-G3 for ged-emacs-devel@m.gmane.org; Thu, 05 Jul 2007 16:06:32 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1I6RyZ-0000BO-Qp for ged-emacs-devel@m.gmane.org; Thu, 05 Jul 2007 10:06:31 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1I6RyW-0000BI-LS for emacs-devel@gnu.org; Thu, 05 Jul 2007 10:06:28 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1I6RyW-0000B5-2p for emacs-devel@gnu.org; Thu, 05 Jul 2007 10:06:28 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1I6RyW-0000B2-0J for emacs-devel@gnu.org; Thu, 05 Jul 2007 10:06:28 -0400 Original-Received: from mercure.iro.umontreal.ca ([132.204.24.67]) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1I6RyV-0002jY-CN for emacs-devel@gnu.org; Thu, 05 Jul 2007 10:06:27 -0400 Original-Received: from hidalgo.iro.umontreal.ca (hidalgo.iro.umontreal.ca [132.204.27.50]) by mercure.iro.umontreal.ca (Postfix) with ESMTP id E4B662CF0A3; Thu, 5 Jul 2007 10:06:26 -0400 (EDT) Original-Received: from faina.iro.umontreal.ca (faina.iro.umontreal.ca [132.204.26.177]) by hidalgo.iro.umontreal.ca (Postfix) with ESMTP id 7CA343FE0; Thu, 5 Jul 2007 10:06:21 -0400 (EDT) Original-Received: by faina.iro.umontreal.ca (Postfix, from userid 20848) id 6A5116C8CC; Thu, 5 Jul 2007 10:06:21 -0400 (EDT) In-Reply-To: <468B4194.000005.15879@pantene.yandex.ru> (dmantipov@yandex.ru's message of "Wed\, 4 Jul 2007 10\:43\:32 +0400 \(MSD\)") User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1.50 (gnu/linux) X-DIRO-MailScanner-Information: Please contact the ISP for more information X-DIRO-MailScanner: Found to be clean X-DIRO-MailScanner-SpamCheck: n'est pas un polluriel, SpamAssassin (score=-2.82, requis 5, autolearn=not spam, ALL_TRUSTED -2.82) X-DIRO-MailScanner-From: monnier@iro.umontreal.ca X-detected-kernel: Linux 2.6 (newer, 3) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:74341 Archived-At: > On some systems, Lisp_Object may be a tagged pointer with 29-bit (on > 32-bit system) pointer field. Since mmap() tends to allocate memory at > high addresses, this memory is likely to be non-addressable by such > pointer. That is why lisp_align_malloc() currently uses > mallopt(M_MMAP_MAX, 0) to prevent mapping the region (if underlying > malloc() supports this). I haven't found the time to do it, but it would be good to get rid of this situation and always place tags in the 3 LSB bits. Stefan