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From: Conrad Meyer <cem@freebsd.org>
Date: Wed, 14 Feb 2018 00:06:51 -0800
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Subject: Re: select call in devd
To: Gleb Popov <6yearold@gmail.com>
Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>
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On Tue, Feb 13, 2018 at 11:56 PM, Gleb Popov <6yearold@gmail.com> wrote:
> Haven't looked at code at all, but why is it using select and not
> kqueue/kevent?

Because select/poll are a lot easier to use for one-off monitoring of
a single descriptor, and devd isn't trying to scale to 10k descriptors
here.