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Re: Coping with errors in starting async compilations

From: Eli Zaretskii
Subject: Re: Coping with errors in starting async compilations
Date: Mon, 18 Oct 2021 15:38:11 +0300

> From: Andrea Corallo <akrl@sdf.org>
> Cc: emacs-devel@gnu.org
> Date: Mon, 18 Oct 2021 08:44:41 +0000
> > Is comp-run-async-workers capable of coping with failures to launch a
> > sub-process due to stuff like insufficient resources?  For example,
> > Emacs on MS-Windows doesn't allow to start more than 31 sub-processes
> > (including network connections, so it could be less than that), so
> > what happens when comp-run-async-workers attempts to start another
> > sub-process and that fails with EAGAIN?  That should be handled like
> > reaching the limitation of comp-effective-async-max-jobs.  Perhaps it
> > already is?
> >
> > Thanks.
> Hi Eli,
> good point, this is not handled.  What should the intended behaivour we
> want?  Restart new compilations failed with EAGAIN and wait to start new
> one?

Yes, just like you do when the number of running jobs reaches the
maximum allowed number: queue the rest for later execution.  IOW,
effectively behave like comp-effective-async-max-jobs was lowered.

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