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From: Ken Brown <kbrown AT cornell DOT edu>
To: cygwin <cygwin AT cygwin DOT com>
Subject: Re: Fork issue with timerfd
Date: Mon, 25 Feb 2019 02:23:47 +0000
Message-ID: <133d62b5-afd5-ae73-b950-7b50471e111e@cornell.edu>
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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'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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