From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#25247: 26.0.50; Concurrency crashes with XLib Date: Fri, 30 Dec 2016 22:40:47 +0200 Message-ID: <83tw9lrvzk.fsf@gnu.org> References: <87bmw4w9i2.fsf@gmail.com> <83a8bn27qn.fsf@gnu.org> <87h95vmi7b.fsf@gmail.com> <83wperyrgj.fsf@gnu.org> <878tr651a9.fsf@gmail.com> <83mvfmzq9n.fsf@gnu.org> <87shp7j790.fsf_-_@gmail.com> <06A3A860-6057-4932-A654-F7663B432DEB@raeburn.org> <83bmvtu81z.fsf@gnu.org> <838tqxu535.fsf@gnu.org> <834m1lu16d.fsf@gnu.org> <83vau1s0wu.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1483130474 780 195.159.176.226 (30 Dec 2016 20:41:14 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 30 Dec 2016 20:41:14 +0000 (UTC) Cc: raeburn@raeburn.org, tino.calancha@gmail.com, 25247@debbugs.gnu.org To: lokedhs@gmail.com Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Dec 30 21:41:08 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1cN3z8-0007Jv-Pb for geb-bug-gnu-emacs@m.gmane.org; Fri, 30 Dec 2016 21:41:06 +0100 Original-Received: from localhost ([::1]:41417 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cN3zB-0003gX-0r for geb-bug-gnu-emacs@m.gmane.org; Fri, 30 Dec 2016 15:41:09 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38345) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cN3z5-0003gQ-Is for bug-gnu-emacs@gnu.org; Fri, 30 Dec 2016 15:41:04 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cN3z4-0000DO-Of for bug-gnu-emacs@gnu.org; Fri, 30 Dec 2016 15:41:03 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:45231) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cN3z4-0000DF-LI for bug-gnu-emacs@gnu.org; Fri, 30 Dec 2016 15:41:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1cN3z4-0001dM-Cd for bug-gnu-emacs@gnu.org; Fri, 30 Dec 2016 15:41:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 30 Dec 2016 20:41:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 25247 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 25247-submit@debbugs.gnu.org id=B25247.14831304596265 (code B ref 25247); Fri, 30 Dec 2016 20:41:02 +0000 Original-Received: (at 25247) by debbugs.gnu.org; 30 Dec 2016 20:40:59 +0000 Original-Received: from localhost ([127.0.0.1]:60630 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cN3z0-0001cz-Sv for submit@debbugs.gnu.org; Fri, 30 Dec 2016 15:40:59 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:47338) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cN3yz-0001cn-UU for 25247@debbugs.gnu.org; Fri, 30 Dec 2016 15:40:58 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cN3yr-0000AA-HU for 25247@debbugs.gnu.org; Fri, 30 Dec 2016 15:40:52 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:60533) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cN3yr-0000A6-E7; Fri, 30 Dec 2016 15:40:49 -0500 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:3330 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1cN3yq-0006Ts-EP; Fri, 30 Dec 2016 15:40:48 -0500 In-reply-to: <83vau1s0wu.fsf@gnu.org> (message from Eli Zaretskii on Fri, 30 Dec 2016 20:54:25 +0200) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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" Xref: news.gmane.org gmane.emacs.bugs:127594 Archived-At: > Date: Fri, 30 Dec 2016 20:54:25 +0200 > From: Eli Zaretskii > Cc: raeburn@raeburn.org, tino.calancha@gmail.com, 25247@debbugs.gnu.org > > I think the results are unexpected only because you think of the > threads as running in parallel. But they don't; only one thread runs > at any given time, the rest are stuck, either in 'pselect', waiting > for some input or time-out, or waiting for the global lock to become > available. And sleep-for yields to other threads (i.e. makes the > global lock available). And one additional piece of this puzzle is that you only see stuff inserted into a buffer when redisplay runs. And redisplay runs when some thread waits for input and finds that none is available.