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bug#24756: 26.0.50; Emacs should not use pselect
From: |
Stefan Kangas |
Subject: |
bug#24756: 26.0.50; Emacs should not use pselect |
Date: |
Sun, 29 Sep 2019 06:02:56 +0200 |
Philipp Stephani <p.stephani2@gmail.com> writes:
> Philipp Stephani <p.stephani2@gmail.com> schrieb am Fr., 21. Okt. 2016 um
> 17:42 Uhr:
>
> Emacs uses pselect for IO multiplexing, limiting the number of available
> file descriptors to FD_SETSIZE. Rather, epoll/kqueue should be used, if
> available.
>
> Some good counter-arguments were brought up:
> - pselect is in the POSIX standard, whereas the possible replacements
> (ppoll/epoll/kqueue) are not.
> - The file descriptor limit should only be hit in pathological cases, e.g.
> when leaking background processes, and is only a symptom of a bug somewhere
> else. A higher FD limit would only hide the symptom, but not fix the
> underlying root cause.
>
> Given that, I'm no longer convinced that switching away from pselect would be
> a good idea (but I'll leave this bug open for now to provide a space for
> discussion).
That was three years ago, and no such discussion has taken place here.
If there is a continued need to discuss this, perhaps it's better to
take it to emacs-devel. I'm therefore closing this bug report.
If anyone disagrees, they should feel free to reopen.
Best regards,
Stefan Kangas
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