kib 3a5cca2657 top: do not fall to the thread name if kernel cache of the process
args is empty.

Instead, use kvm_getargv() unconditionally to obtain the process
arguments.  It means that one additional sysctl(2) is performed there.

Submitted by:	Thomas Munro
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D16111
2018-07-04 13:28:16 +00:00
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