D52231.diff
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	diff --git a/share/man/man4/random.4 b/share/man/man4/random.4
	--- a/share/man/man4/random.4
	+++ b/share/man/man4/random.4
	@@ -21,7 +21,7 @@
	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	.\" SUCH DAMAGE.
	.\"
	-.Dd April 19, 2019
	+.Dd August 28, 2025
	.Dt RANDOM 4
	.Os
	.Sh NAME
	@@ -132,6 +132,17 @@
	See
	.Xr random_harvest 9
	for more on the harvesting of entropy.
	+.Pp
	+The
	+.Va kern.random.nist_healthtest_enabled
	+tunable can be used to enable the entropy source health tests outlined
	+in section 4 of NIST Special Publication 800-90B.
	+When enabled, all entropy sources will be subject to the repetition
	+count and adaptive proportion tests described in that document.
	+If one of the tests fails, the source will be disabled, i.e., all
	+subsequent entropy samples from that source will be discarded.
	+The implementation performs startup testing, during which entropy
	+sources are discarded.
	.Sh FILES
	.Bl -tag -width ".Pa /dev/urandom"
	.It Pa /dev/random