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Per commit "77873803363c net_dma: mark broken" net_dma is no longer used and there is no plan to fix it. This is the mechanical removal of bits in CONFIG_NET_DMA ifdef guards. Reverting the remainder of the net_dma induced changes is deferred to subsequent patches. Marked for stable due to Roman's report of a memory leak in dma_pin_iovec_pages(): https://lkml.org/lkml/2014/9/3/177 Cc: Dave Jiang <dave.jiang@intel.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: David Whipple <whipple@securedatainnovations.ch> Cc: Alexander Duyck <alexander.h.duyck@intel.com> Cc: <stable@vger.kernel.org> Reported-by: Roman Gushchin <klamm@yandex-team.ru> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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339 B
Plaintext
9 lines
339 B
Plaintext
What: tcp_dma_copybreak sysctl
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Date: Removed in kernel v3.13
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Contact: Dan Williams <dan.j.williams@intel.com>
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Description:
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Formerly the lower limit, in bytes, of the size of socket reads
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that will be offloaded to a DMA copy engine. Removed due to
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coherency issues of the cpu potentially touching the buffers
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while dma is in flight.
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