GNU bug report logs -
#24756
26.0.50; Emacs should not use pselect
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Reported by: Philipp Stephani <p.stephani2 <at> gmail.com>
Date: Fri, 21 Oct 2016 15:42:01 UTC
Severity: wishlist
Found in version 26.0.50
Done: Stefan Kangas <stefan <at> marxist.se>
Bug is archived. No further changes may be made.
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Message #8 received at 24756 <at> debbugs.gnu.org (full text, mbox):
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Philipp Stephani <p.stephani2 <at> 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).
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This bug report was last modified 5 years and 273 days ago.
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