From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#12450: Remove configure's --without-sync-input option. Date: Sun, 16 Sep 2012 09:10:15 +0300 Message-ID: <83haqysdko.fsf@gnu.org> References: <50543449.1070306@cs.ucla.edu> <50554458.6040308@cs.ucla.edu> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1347775863 28866 80.91.229.3 (16 Sep 2012 06:11:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 16 Sep 2012 06:11:03 +0000 (UTC) Cc: lekktu@gmail.com, rms@gnu.org, 12450@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Sep 16 08:11:06 2012 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TD84Q-0002nr-1d for geb-bug-gnu-emacs@m.gmane.org; Sun, 16 Sep 2012 08:11:06 +0200 Original-Received: from localhost ([::1]:35849 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TD84L-0001Wr-Uv for geb-bug-gnu-emacs@m.gmane.org; Sun, 16 Sep 2012 02:11:01 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:46732) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TD84H-0001Wb-Fk for bug-gnu-emacs@gnu.org; Sun, 16 Sep 2012 02:10:59 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TD84F-0003eH-S3 for bug-gnu-emacs@gnu.org; Sun, 16 Sep 2012 02:10:57 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:54959) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TD84F-0003eA-OA for bug-gnu-emacs@gnu.org; Sun, 16 Sep 2012 02:10:55 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TD85K-0002ex-Bv for bug-gnu-emacs@gnu.org; Sun, 16 Sep 2012 02:12:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 16 Sep 2012 06:12:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 12450 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 12450-submit@debbugs.gnu.org id=B12450.134777588410171 (code B ref 12450); Sun, 16 Sep 2012 06:12:02 +0000 Original-Received: (at 12450) by debbugs.gnu.org; 16 Sep 2012 06:11:24 +0000 Original-Received: from localhost ([127.0.0.1]:36272 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TD84h-0002e0-Ij for submit@debbugs.gnu.org; Sun, 16 Sep 2012 02:11:23 -0400 Original-Received: from mtaout20.012.net.il ([80.179.55.166]:33759) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TD84f-0002ds-0E for 12450@debbugs.gnu.org; Sun, 16 Sep 2012 02:11:22 -0400 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0MAF00200IEXFG00@a-mtaout20.012.net.il> for 12450@debbugs.gnu.org; Sun, 16 Sep 2012 09:10:12 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MAF002L6IGZ2UH0@a-mtaout20.012.net.il>; Sun, 16 Sep 2012 09:10:12 +0300 (IDT) In-reply-to: <50554458.6040308@cs.ucla.edu> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 140.186.70.43 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.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:64388 Archived-At: > Date: Sat, 15 Sep 2012 20:15:36 -0700 > From: Paul Eggert > Cc: lekktu@gmail.com, 12450@debbugs.gnu.org > > On 09/15/2012 03:18 PM, Richard Stallman wrote: > > I have a vague memory that the sync input code had an important flaw > > -- that for certain display-updating tasks (perhaps > > mouse-highlighting) it could cause a delay until Emacs was read to > > accept input, which the other code could do instantly. > > > > I don't know if this is true now, and I'm not sure of the memory at all. > > But it would be good to investigate this question. > > Yes, that topic came up in 2008 when SYNC_INPUT was made the > default on non-Windows hosts. That discussion concluded that it's > not a problem in practice, because SYNC_INPUT does not postpone > X11 event processing indefinitely; it postpones it only until the > next QUIT or UNBLOCK_INPUT. Please see Stefan's comment in > , > along with the surrounding thread. The remaining issues noted in > that thread all seem to have been fixed since then, for the > SYNC_INPUT case. That thread left the MS-Windows case indeterminate. And I still would like to have BLOCK_INPUT in xmalloc and friends, conditioned on some global variable being non-zero. That way, if some strange problems come up, we can ask people to set that variable to a non-zero value in a debugger and see if the problems persist. Given that no one here actually understands all the aspects of the related issues, that is a prudent thing to do, especially with code freeze and Emacs 24.3 release looming.