[PATCH v2 0/2] silent fork retry with shm (broke emacs-X11)

Michael Haubenwallner michael.haubenwallner@ssi-schaefer.com
Thu Aug 1 09:29:00 GMT 2019

On 7/31/19 7:25 PM, Ken Brown wrote:
> On 7/31/2019 12:59 PM, Corinna Vinschen wrote:
>> On Jul 31 12:35, Michael Haubenwallner wrote:
>>> On 7/30/19 6:07 PM, Corinna Vinschen wrote:
>>>> On Jul 30 17:22, Michael Haubenwallner wrote:
>>>>> Hi,
>>>>> following up
>>>>> https://cygwin.com/ml/cygwin-patches/2019-q2/msg00155.html
>>>>> It turns out that fixup_shms_after_fork does require the child pinfo to
>>>>> be "remember"ed, while the fork retry to be silent on failure requires
>>>>> the child to not be "attach"ed yet.
>>>>> As current pinfo.remember performs both "remember" and "attach" at once,
>>>>> the first patch does introduce pinfo.remember_without_attach, to not
>>>>> change current behaviour of pinfo.remember and keep patches small.
>>>>> However, my first thought was to clean up pinfo API a little and have
>>>>> remember not do both "remember+attach" at once, but introduce some new
>>>>> remember_and_attach method instead.  But then, when 'bool detach' is
>>>>> true, the "_and_attach" does feel wrong.
>>>> I'd prefer to drop the reattach call from remember, calling both of them
>>>> where appropriate.
>>> Fine with me, even if that looks a little more complicated for spawn.
>> Pushed, with just a small formatting tweak.
> I can confirm that this fixes the problem I reported in 
> https://cygwin.com/ml/cygwin-patches/2019-q2/msg00155.html.

Corinna, Ken: Thanks a lot!

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