From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.kundenserver.de (mout.kundenserver.de [217.72.192.73]) by sourceware.org (Postfix) with ESMTPS id 11E263857C77 for ; Tue, 11 Aug 2020 17:36:59 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 11E263857C77 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=towo.net Authentication-Results: sourceware.org; spf=none smtp.mailfrom=towo@towo.net Received: from [192.168.178.63] ([95.90.245.244]) by mrelayeu.kundenserver.de (mreue108 [212.227.15.183]) with ESMTPSA (Nemesis) id 1N6KQZ-1klRT92S6b-016jQA for ; Tue, 11 Aug 2020 19:36:58 +0200 Subject: Re: Race condition hangs on multiple mintty/tcsh? Brad Wetmore To: cygwin@cygwin.com References: <1988bd34-7a17-e70f-bf23-0044f30c8687@towo.net> <1193403444.420395.1596669799506@mail.yahoo.com> <3d594543-c992-a22c-4631-f786cf34f76b@towo.net> <20200811135948.959c10de83b8ccfa35f4281a@nifty.ne.jp> <20200811093758.GF53219@calimero.vinschen.de> <20200811190200.cc385900e784c6cd076f53ba@nifty.ne.jp> <20200811103008.GH53219@calimero.vinschen.de> From: Thomas Wolff X-Tagtoolbar-Keys: D20200811193703785 Message-ID: Date: Tue, 11 Aug 2020 19:37:03 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <20200811103008.GH53219@calimero.vinschen.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-GB X-Provags-ID: V03:K1:DSqkVaLSCF9A8I85cOEe5Qo6wU1D+Yrs7CBdls6U50Eq+f27Y44 EU0ZR2xJuuGZvqY7NAF6iZCX1aDXZyz8dVV+Km5gi/ZcY6axq003vGmwDZGT+mSONc3m1IV +qXhmlGOTRTWXiIRo4fjEX+fxwdZutpT8JUz7S7r0gdPv9erzuOYXj8pX85em6hA1OvGh55 t+QgXRaLLUnkQwKrWLj3g== X-UI-Out-Filterresults: notjunk:1;V03:K0:fCi+/vD1pTE=:Ex6Edq3h4fbVxDfObly+Lf 4cxFdsGxJe3mm5HkK2WcDzoPh0lL1OM2v+EjnMB13lT+k3rBSptEa1xxeqidfx//PK14Bdp5G W8Mi4xxUZzgELJOQMa3NbrlUZtE479yAaOovliz5qYqNsP8K9T6fUtVOoe+0bMbKPGEXVtfr8 /sIsTeb3kON8GBRRcJ0rw/xCugo0HOkCJAdaCYHPk28ncxuNC1rw6VNxxD7UnXBGEUINTKjNC sgNsqf9+kqNuVxl3kwhb5p3nzrFIWkhQhTKutEIDeO6yv4EO6xyxn7dy0CMS29oWoqUFLKqVv Oehj2E3A4qaiLSxPvZSnGWdEVSTasVIyfa8ahKfmuv1CzyzqCukEGAGm/PHa/6D4TYThx1wbv gsIIGrB3GSKAWgG7iR3/m8RE/C1wYDzivB3jLspnoUoGeNAs85LenO6MhF3SIDxYDMNzkQppT lWAKtenckxk6SDHO7JiM9nXckuR6hkfKR3FqieUxxPluciVit0OW2guLT2BmkecJdlZpSD6/p Ru0j+No3N4EfYxHWJzW6YuGnXWa5Rl0JRHbkkskxYdE4sFobgSS5sK5FBfSWzbXwEbRMkFCDR 4bbu5nvA7Cw5TPgJhjLPSSkmFXHQLLDYcPS5xTine5Z46QBTXTFIizNoHu4ihoAfxR4JFX2sE Ke/zfHCjYwHaXDe1ROmSJ/X5x691RW7V0GZTj5UoHYMH1LPC2piAZ8wX4oU0TJT1mb51olsZK +r+AamVryZbcvtILw6ciOHKIMfPWEXvUKYXJcuyr4W7F4O3bDJYurYeIYPWP8wBWCAt2O5pZx L88Q7Xc8oOx4MAFavgkZdk7OH4QT/v2cU4tEkhfSJbi4ArApw52Q53pkQCJs6lk76/d1vXv X-Spam-Status: No, score=-6.2 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, NICE_REPLY_A, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=no autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Aug 2020 17:37:01 -0000 On 11.08.2020 12:30, Corinna Vinschen wrote: > On Aug 11 19:02, Takashi Yano via Cygwin wrote: >> On Tue, 11 Aug 2020 11:37:58 +0200 >> Corinna Vinschen wrote: >>> On Aug 11 13:59, Takashi Yano via Cygwin wrote: >>>> Hi Thomas, >>>> >>>> On Thu, 6 Aug 2020 15:31:24 +0200 >>>> Thomas Wolff wrote: >>>>> Am 06.08.2020 um 13:46 schrieb Thomas Wolff: >>>>>> Am 06.08.2020 um 01:23 schrieb Kevin Schnitzius via Cygwin: >>>>>>> On Wednesday, August 5, 2020, 06:56:48 PM EDT, Thomas Wolff >>>>>>> wrote: >>>>>>>> Am 04.08.2020 um 12:02 schrieb Thomas Wolff: >>>>>>>>> Am 04.08.2020 um 00:13 schrieb Brad Wetmore via Cygwin: >>>>>>>>>> Hi, >>>>>>>>>> >>>>>>>>>> I generally kick off multiple (10) mintty sessions, and place them >>>>>>>>>> around the screen. >>>>>>>>>> [...] >>>>>> I could reproduce one case of one of three terminals being >>>>>> unresponsive also with xterm. >>>>> And it also happens if I drop select() from mintty (and use just >>>>> non-blocking read()). >>>>>> Does anybody familiar with pty/select or recent changes have any idea? >>>> I looked into this problem. After much struggle, I think >>>> I have found a workaround for this issue. >>>> >>>> I am not sure why this solves the issue at all, however, >>>> this works for me. >>>> >>>> Could you please test a patch attached? >>> Shall I commit the patch and create a developer snapshot for testing? >> Thanks so much. That would be more convenient for potential testers. > Done. Please try the latest snapshot from https://cygwin.com/snapshots/ Thanks. I could not reproduce the issue on one system in ~27 cases. I'd like to retest on another system where I could previously produce the issue more frequently, but that's currently broken... Thomas