X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:subject:date:message-id:references :in-reply-to:content-type:content-id:content-transfer-encoding :mime-version; q=dns; s=default; b=Z6aqeiS4twSuprjpT5EDXFcCMhzLN 8ug6R6JNdtFWb+885/DyLh+GUDkNmMlTMi8iOQSJi97v6OACqWzVv/vBgmkq+9rx Cy9cupwfUIMXXKojGiPKlfU6UDim30To9GlD9/qhdYGp1Iqm//e/p6scWJZ6z1R/ GqUC4FCzEb8aJ0= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:subject:date:message-id:references :in-reply-to:content-type:content-id:content-transfer-encoding :mime-version; s=default; bh=lKuTvf1v+ra5hg7HnV/+Ak+G9DM=; b=bPL 3j3BL7MXhxhGMTuSabNRkRVHBcN18BPEDqwmzpsoJk+eJRvQie1K47d6UwrVyskB yUfsVEChy2u1sLNAJGWB1Y3ASh8cZWXLfDoMUNcSFtTk74ql+ksFDVWa+DuGZ2Uo jPq6z8ICCfZYeVQRN0Sivr4OGhmCVhfjYCPz6Z6M= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=BAYES_00,MIME_BASE64_BLANKS,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.2 spammy=trials, Hx-languages-length:2415, timer X-HELO: NAM04-SN1-obe.outbound.protection.outlook.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cornell.edu; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=jR3bOQlX35NwdQG3saxmwPh7dUFn4FicdFjtPRQ4w+k=; b=MlGb4O2P9GpVAVZw1Mqp1QGv8ALAsMYwYbw3e6AKWfsNOaZ6Pz/pGbAsd8/KighmaCS7MlOiBvBq4HqO85x8j3zgenJaDWVPcmiZ2A9/5yZkNCy+gR/yfwJWwvBO29Fv8II7PBEBOxXbpEWDXclWpUuiQ0OGkbDOhxEzpEQTdtQ= From: Ken Brown To: "cygwin AT cygwin DOT com" Subject: Re: Fork issue with timerfd Date: Tue, 26 Feb 2019 00:01:42 +0000 Message-ID: References: <20190224185524 DOT GE4133 AT calimero DOT vinschen DOT de> <20190224190908 DOT GB10574 AT calimero DOT vinschen DOT de> <20190224195255 DOT GF4133 AT calimero DOT vinschen DOT de> <133d62b5-afd5-ae73-b950-7b50471e111e AT cornell DOT edu> <3142aff3-c7c3-187f-233e-089c5dc15ea2 AT cornell DOT edu> <20190225100300 DOT GH4133 AT calimero DOT vinschen DOT de> <20190225202050 DOT GP4133 AT calimero DOT vinschen DOT de> In-Reply-To: <20190225202050.GP4133@calimero.vinschen.de> user-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 authentication-results: spf=none (sender IP is ) smtp.mailfrom=kbrown AT cornell DOT edu; x-ms-exchange-purlcount: 1 received-spf: None (protection.outlook.com: cornell.edu does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 Content-Type: text/plain; charset="utf-8" Content-ID: <13865D21E5FD524C86E288CFDE0D88FA AT namprd04 DOT prod DOT outlook DOT com> MIME-Version: 1.0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-IsSubscribed: yes Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by delorie.com id x1Q04ZdL028806 On 2/25/2019 3:20 PM, Corinna Vinschen wrote: > On Feb 25 11:03, Corinna Vinschen wrote: >> On Feb 25 03:21, Ken Brown wrote: >>> On 2/24/2019 9:23 PM, Ken Brown wrote: >>>> On 2/24/2019 2:52 PM, Corinna Vinschen wrote: >>>>> On Feb 24 20:09, Corinna Vinschen wrote: >>>>>> On Feb 24 19:55, Corinna Vinschen wrote: >>>>>>> On Feb 24 17:27, Ken Brown wrote: >>>>>>>> I'm seeing sporadic errors like this on 64-bit Cygwin when I first start emacs: >>>>>>>> >>>>>>>> 0 [main] emacs-X11 864 C:\cygwin64\bin\emacs-X11.exe: *** fatal error in >>>>>>>> forked process - Can't recreate shared timerfd section during fork! >>>>>>>> 0 [main] emacs 860 dofork: child 864 - died waiting for dll loading, errno 11 >>>>>>>> >>>>>>>> If I exit and restart, everything will be fine almost every time. >>>>>>> >>>>>>> I think I see where the thinko was here. Can you try this? >>>>>> >>>>>> No, better try this: >>>>>> [...] >>>>> >>>>> Even if this doesn't fully fix your problem, the patch itself is >>>>> certainly better than the former code, so I pushed it. I also >>>>> uploaded new developer snapshots to https://cygwin.com/snapshots/ >>>>> for testing. >>>> >>>> It's better, but not completely fixed. At the moment I'm testing 32-bit only, >>>> since that was the only arch on which I could produce the problem reliably. >>>> Previously I got the error every time I ran emacs. I just tried 5 times with >>>> the new snapshot and only got the error twice. >>> >>> I withdraw that statement. After further tries, it's back to happening every time. >>> >>>> I'll work on this some more tomorrow and see if I can modify the emacs code so >>>> that it gives me the full error message from Cygwin. >> >> I had a late night inspiration, telling me that my timerfd >> implementation has a design flaw in terms of fork/exec timer >> sharing. I guess I should fix that first. Just ignore the >> timerfd stuff for a bit, I'm working on that. > > I pushed a patch and uploaded new developer snapshots to > https://cygwin.com/snapshots/ > > Please try. The x86 fork problem seems to be fixed. I started emacs several times and listed directories without any failure. I did get the following, however, during one of the trials (while emacs was idle): 1 [main] emacs 246 C:\Users\kbrown\src\emacs\i686-emacs26\src\emacs.exe: *** fatal error - CreateThread failed for pipesel - 0x0<0x0>, Win32 error 8 Ken -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple