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From: Ken Brown <kbrown AT cornell DOT edu>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: Re: Fork issue with timerfd
Date: Mon, 25 Feb 2019 03:21:53 +0000
Message-ID: <3142aff3-c7c3-187f-233e-089c5dc15ea2@cornell.edu>
References: <ca9a38b7-c147-78a3-0660-70aa65b41eb3 AT cornell DOT edu> <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>
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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.
> 
> Ken
> 

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