K 10
svn:author
V 8
gallatin
K 8
svn:date
V 27
2017-07-31T14:56:35.303258Z
K 7
svn:log
V 675
Don't request CTLTYPE_OPAQUE if we can't print them.

The intent is to skip expensive opaque sysctls like tcp_pcblist unless
they are explicitly requested. Sysctl nodes like this don't show up in
sysctl -a, but they do generate output that winds up being dropped,
unless the user specifically requested  binary/hex output or opaques.

This reduces the runtime of sysctl in many circumstances on a loaded
system.  It also reduces the likelihood that simply gathering
diagnostics on a sick machine (stuck lock, etc) via sysctl -a might
push it over the edge into a total lockup.

Reviewed by:	jtl
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D11461

END