ethtool -X

      ethtool [ FLAGS ] -X|--set-rxfh-indir|--rxfh DEVNAME	Set Rx flow hash indirection table and/or RSS hash key
		[ context %d|new ] 
		[ equal N | weight W0 W1 ... | default ]
		[ hkey %x:%x:%x:%x:%x:.... ]
		[ hfunc FUNC ]
		[ delete ]

• https://blog.cloudflare.com/kernel-bypass

See also

• ethtool, ethtool --show-offload, ethtool -S