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1What: tcp_dma_copybreak sysctl
2Date: Removed in kernel v3.13
3Contact: Dan Williams <dan.j.williams@intel.com>
4Description:
5 Formerly the lower limit, in bytes, of the size of socket reads
6 that will be offloaded to a DMA copy engine. Removed due to
7 coherency issues of the cpu potentially touching the buffers
8 while dma is in flight.