--- /usr/src/usr.bin/pkill/pkill.1	2014-04-11 15:09:00.000000000 -0700
+++ pkill.1	2018-12-03 11:14:42.574300000 -0800
@@ -29,7 +29,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd August 9, 2013
+.Dd December 3, 2018
 .Dt PKILL 1
 .Os
 .Sh NAME
@@ -240,6 +240,11 @@
 .Nm pkill
 process will never consider itself nor system processes (kernel threads) as
 a potential match.
+.Sh IMPLEMENTATION NOTES
+The Sun Solaris implemenation utilised procfs to obtain process information.
+This implementation utilises
+.Xr kvm 3
+instead.
 .Sh EXIT STATUS
 The
 .Nm pgrep