Cisco nexus TCAM carving question

Currently i have following feature enabled for tcam on Cisco Nexus 9396PX switch

# show run all | grep tcam | exclude 0 hardware access-list tcam region qos 256 hardware access-list tcam region racl 512 hardware access-list tcam region e-racl 256 hardware access-list tcam region copp 256 hardware access-list tcam region redirect 256 hardware access-list tcam region ns-qos 256 hardware access-list tcam region ns-vqos 256 hardware access-list tcam region ns-l3qos 256 hardware access-list tcam region rp-qos 256 hardware access-list tcam region rp-ipv6-qos 256 hardware access-list tcam region rp-mac-qos 256 hardware access-list tcam region ipv6-racl 512 hardware access-list tcam region arp-ether 256 hardware access-list tcam region sflow 256 

This is border leaf of EVPN clos fabric, I want to enable span feature so trying to find free up some tcam from other region but confused if i break something else.

Example:

I am using BFD so i need redirect 256, I am using ACL v4 and v6 so i can't take that tcam also, same with arp-ether for suppression, using sflow for collector.

Now question is QoS (i didn't configure any kind of QoS related thing on this switch, I have just enabled Jumbo Frames only.

I can take qos 256 and give it to span but how do i confirm nobody using qos before i take that memory share?