GNU bug report logs - #40023
26.3; Emacs crashes when creating process if many file handles are in use (e.g., when using ccls)

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Package: emacs;

Reported by: Holger Pirk <holger <at> pirk.name>

Date: Wed, 11 Mar 2020 14:33:01 UTC

Severity: normal

Merged with 39164, 40555

Found in versions 27.0.60, 27.0.90, 26.3

Fixed in version 27.1

Done: Robert Pluim <rpluim <at> gmail.com>

Bug is archived. No further changes may be made.

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From: Michael Albinus <michael.albinus <at> gmx.de>
To: Mattias Engdegård <mattiase <at> acm.org>
Cc: Robert Pluim <rpluim <at> gmail.com>, 40023 <at> debbugs.gnu.org
Subject: bug#40023: 26.3 Emacs crashes when creating process if many file handles are in use (e.g., when using ccls)
Date: Sun, 12 Apr 2020 12:19:44 +0200

Mattias Engdegård <mattiase <at> acm.org> writes:

> Actually reducing RLIMIT_NOFILE doesn't sound like a terrific idea --
> if anything, we need as many descriptors as we can get, in particular
> on macOS where kqueue uses up one per monitored file. If we are
> limited by FD_SETSIZE, then we shouldn't use select. Or am I missing
> something?

kqueue limits itself to (RLIMIT_NOFILE - 50) file descriptors. If 50
file descriptors aren't sufficient, we could increase that number, or
make it a defvar changeable via Lisp.

See line 397 of kqueue.c

Best regards, Michael.
This bug report was last modified 5 years and 97 days ago.

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