DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 8D7C3385ED4D
Subject: Re: Race condition hangs on multiple mintty/tcsh? Brad Wetmore
To: cygwin@cygwin.com
References: <BYAPR07MB59428411CD00101EF02400B4B64D0@BYAPR07MB5942.namprd07.prod.outlook.com>
 <ff57a2c8-6753-02d6-7a85-9657d70bc897@towo.net>
 <1988bd34-7a17-e70f-bf23-0044f30c8687@towo.net>
 <1193403444.420395.1596669799506@mail.yahoo.com>
 <cc296c5f-c958-21bf-3a14-9584180de591@towo.net>
 <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>
 <cf31ce0f-99f8-68a4-772b-b632e1fb969e@towo.net>
From: Thomas Wolff <towo@towo.net>
Message-ID: <a903b7a6-a432-ad79-b5ef-d2013eca6046@towo.net>
Date: Wed, 12 Aug 2020 22:27:40 +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: <cf31ce0f-99f8-68a4-772b-b632e1fb969e@towo.net>
Precedence: list
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Errors-To: cygwin-bounces@cygwin.com
Sender: "Cygwin" <cygwin-bounces@cygwin.com>
Content-Transfer-Encoding: 8bit

Am 11.08.2020 um 19:37 schrieb Thomas Wolff:
>
> 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
>>>>>>>> <towo@towo.net> 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...
I gave it another 22 test instances on my other machine (the more 
sensitive one), no issue reproduced with the patch.
--
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple