[deliverable/linux.git] / Documentation / ABI / removed / net_dma

What:		tcp_dma_copybreak sysctl
Date:		Removed in kernel v3.13
Contact:	Dan Williams <dan.j.williams@intel.com>
Description:
	Formerly the lower limit, in bytes, of the size of socket reads
	that will be offloaded to a DMA copy engine.  Removed due to
	coherency issues of the cpu potentially touching the buffers
	while dma is in flight.
Commit	Line	Data
7bced397 DW	1	What: tcp_dma_copybreak sysctl
	2	Date: Removed in kernel v3.13
	3	Contact: Dan Williams <dan.j.williams@intel.com>
	4	Description:
	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.