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HDS options(tcp-data-split, hds-thresh) have dependencies between other features like XDP. Basic dependencies are checked in the core API. netdevsim is very useful to check basic dependencies. The default tcp-data-split mode is UNKNOWN but netdevsim driver returns ENABLED when ethtool dumps tcp-data-split mode. The default value of HDS threshold is 0 and the maximum value is 1024. ethtool shows like this. ethtool -g eni1np1 Ring parameters for eni1np1: Pre-set maximums: ... HDS thresh: 1024 Current hardware settings: ... TCP data split: on HDS thresh: 0 ethtool -G eni1np1 tcp-data-split on hds-thresh 1024 ethtool -g eni1np1 Ring parameters for eni1np1: Pre-set maximums: ... HDS thresh: 1024 Current hardware settings: ... TCP data split: on HDS thresh: 1024 Signed-off-by: Taehee Yoo <ap420073@gmail.com> Link: https://patch.msgid.link/20250114142852.3364986-10-ap420073@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>