kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_ATM_ENI_BURST_RX_2W.
Result is shown for kernelversion 6.0-rc7

Enable 2W RX bursts (optional)

configname: CONFIG_ATM_ENI_BURST_RX_2W

Linux Kernel Configuration
└─> Device Drivers
└─> Network device support
└─> ATM drivers
└─> Enable 2W RX bursts (optional)

Burst two words at once in the receive direction. You may want to
try this if you have disabled 4W and 8W bursts. Enabling 2W if 4W or
8W are also set may or may not improve throughput.