162306a36Sopenharmony_ciWhat: tcp_dma_copybreak sysctl 262306a36Sopenharmony_ciDate: Removed in kernel v3.13 362306a36Sopenharmony_ciContact: Dan Williams <dan.j.williams@intel.com> 462306a36Sopenharmony_ciDescription: 562306a36Sopenharmony_ci Formerly the lower limit, in bytes, of the size of socket reads 662306a36Sopenharmony_ci that will be offloaded to a DMA copy engine. Removed due to 762306a36Sopenharmony_ci coherency issues of the cpu potentially touching the buffers 862306a36Sopenharmony_ci while dma is in flight. 9