Beta for lossless headroom feature

Author: cumulusAnia

content/cumulus-linux-517/Layer-1-and-Switch-Ports/Quality-of-Service/_index.md

@@ -774,6 +774,10 @@ To clear the PFC watchdog `deadlock-count` on an interface, run the `nv action c
 
 ### Lossless Headroom Based on Small Packet Probability
 
+{{%notice note%}}
+Lossless headroom based on small packet probability is a Beta feature.
+{{%/notice%}}
+
 Cumulus Linux calculates the headroom size for lossless priority groups based on the assumption that all packets are small (64 bytes). On Spectrum-5 and earlier, the switch assumes a 100 percent probability of such packets arriving at line rate. On Spectrum-6, the switch assumes a 50 percent probability of such packets arriving at line rate. As a result, the configured headroom is often larger than necessary, as traffic typically consists of a mix of packet sizes.
 
 To enable more accurate headroom calculations, providing for better buffer allocation and improved shared buffer utilization, you can configure the probability of small packets on ports applied with {{<link url="#priority-flow-control-(pfc)" text="priority flow control">}}.

content/cumulus-linux-517/Whats-New/_index.md

@@ -15,7 +15,7 @@ Cumulus Linux 5.17 contains new features and improvements, and provides bug fixe
 ### New Features and Enhancements
 
 - {{<link url="TACACS/#server-side-per-command-authorization" text="TACACS+ Server-side Per-command Authorization">}}
-- {{<link url="Quality-of-Service/#lossless-headroom-based-on-small-packet-probability" text="Lossless headroom size based on small packet probability">}}
+- {{<link url="Quality-of-Service/#lossless-headroom-based-on-small-packet-probability" text="Lossless headroom size based on small packet probability">}} (Beta)
 - Dynamic ECN (Beta)
 - Instant Retransmission System (Beta)
 - LLDP BGP Route Redistribution Extension (Beta)