Hi,

Mathieu Othacehe <othacehe@gnu.org> skribis:

> Those two finalizer threads share the same pipe. When we try to
> stop the finalizer thread in Shepherd, right before forking a new
> process, we send a '\1' byte to the finalizer pipe.
>
> 1     write(6, "\1", 1 <unfinished ...>
>
>
> which is received by (line 183597): 
>
> 253   <... read resumed>"\1", 1)        = 1
>
> the marionette finalizer thread. Then, we pthread_join the Shepherd
> finalizer thread, which never stops! Quite unfortunate.

And here’s the patch for this pipe: it closes the finalizer pipe
pre-fork, and it gets reopened lazily.

Together with the ‘sleep_pipe’ patch, it appears to fix the problems
described here.

Ludo’.