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Date:      Tue, 4 Aug 2015 15:47:26 -0700
From:      Garrett Cooper <yaneurabeya@gmail.com>
To:        freebsd-hackers <freebsd-hackers@freebsd.org>
Cc:        Hans Petter Selasky <hps@selasky.org>
Subject:   When and when not to use CTLFLAG_MPSAFE with the SYSCTL macros..?
Message-ID:  <F4A56F9C-058B-4D91-B75D-92DEC16E8B2E@gmail.com>
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Hi,
	I’ve been trying to figure out (because sysctl(9) is lacking) when to use CTLFLAG_MPSAFE. Is it strictly when dealing with SYSCTL_PROC handlers that do proper locking of shared resources, or are there other nuances that need to be handled?
	I’m also asking because SYSCTL_UQUAD, for instance, explicitly uses CTLFLAG_MPSAFE in the handler, which is a bit confusing.
Thanks!
-NGie
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