diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/removed/net_dma | 8 | ||||
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 6 |
2 files changed, 8 insertions, 6 deletions
diff --git a/Documentation/ABI/removed/net_dma b/Documentation/ABI/removed/net_dma new file mode 100644 index 0000000..a173aec --- /dev/null +++ b/Documentation/ABI/removed/net_dma @@ -0,0 +1,8 @@ +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. diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index ab42c95..ea8f3b1 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -582,12 +582,6 @@ tcp_workaround_signed_windows - BOOLEAN not receive a window scaling option from them. Default: 0 -tcp_dma_copybreak - INTEGER - Lower limit, in bytes, of the size of socket reads that will be - offloaded to a DMA copy engine, if one is present in the system - and CONFIG_NET_DMA is enabled. - Default: 4096 - tcp_thin_linear_timeouts - BOOLEAN Enable dynamic triggering of linear timeouts for thin streams. If set, a check is performed upon retransmission by timeout to |