D57256.diff
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	diff --git a/share/man/man9/iflibdd.9 b/share/man/man9/iflibdd.9
	--- a/share/man/man9/iflibdd.9
	+++ b/share/man/man9/iflibdd.9
	@@ -207,6 +207,9 @@
	the hardware receive queues.
	nrxqs is the number of queues per qset.
	nrxqsets is the number of qsets.
	+The qset count is not guaranteed to be a power of two, so reduce an
	+RSS bucket to a queue with a modulo, not an AND mask, or some queues
	+are starved.
	.It Fn ifdi_queues_free
	Mandatory function that frees the allocated queues and associated transmit
	buffers.
	diff --git a/sys/net/rss_config.c b/sys/net/rss_config.c
	--- a/sys/net/rss_config.c
	+++ b/sys/net/rss_config.c
	@@ -366,6 +366,10 @@
	* NIC drivers can then iterate over the 128 slot RSS
	* indirection table and fetch which RSS bucket to
	* map it to. This will typically be a CPU queue
	+ *
	+ * Note: a NIC's RX queue count is not guaranteed to be a power of
	+ * two, so reduce the returned bucket to a queue with a modulo, not
	+ * an AND mask, or some queues are starved.
	*/
	u_int
	rss_get_indirection_to_bucket(u_int index)