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Date:	Tue, 26 Feb 2019 10:01:00 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Fork issue with timerfd
Message-ID:	<20190226090100.GR4133@calimero.vinschen.de>
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On Feb 26 09:57, Corinna Vinschen wrote:
> On Feb 26 00:01, Ken Brown wrote:
> > 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 f=
irst 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 ti=
me.
> > >>>>>>>
> > >>>>>>> I think I see where the thinko was here.  Can you try this?
> > >>>>[...]
> > >>>> It's better, but not completely fixed.  At the moment I'm testing =
32-bit only,
> > >>>> [...]
> > >>> I withdraw that statement.  After further tries, it's back to happe=
ning every time.
> > >>>
> > > [...]
> > > I pushed a patch and uploaded new developer snapshots to
> > > https://cygwin.com/snapshots/
> >=20
> > The x86 fork problem seems to be fixed.  I started emacs several times =
and=20
> > listed directories without any failure.
>=20
> Thanks for testing!
>=20
> > I did get the following, however, during one of the trials (while emacs=
 was idle):
> >=20
> > 1 [main] emacs 246 C:\Users\kbrown\src\emacs\i686-emacs26\src\emacs.exe=
: ***=20
> > fatal error - CreateThread failed for pipesel - 0x0<0x0>, Win32 error 8
>=20
> It's hard to imagine how this is related.

... because the above is trying to create a thread used to implement
select on Windows pipes.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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