Network: TCP receive copy offload

default or selected kernelversion does not have config value CONFIG_NET_DMA.
Result is shown for kernelversion 6.5.1

depends

CONFIG_BROKEN
CONFIG_DMADEVICES
CONFIG_DMA_ENGINE
CONFIG_NET

modulename: iovlock.ko

and/or

user_dma.ko
configname: CONFIG_NET_DMA

Linux Kernel Configuration

└─> Device Drivers

└─> DMA Engine support

└─> Network: TCP receive copy offload

In linux kernel since version 2.6.20 (release Date: 2007-02-04)

This enables the use of DMA engines in the network stack to
offload receive copy-to-user operations, freeing CPU cycles.

Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise
say N.

source code:

drivers/dma/iovlock.c