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| author | Maciej Sosnowski <maciej.sosnowski@intel.com> | 2008-07-22 17:30:57 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2008-07-22 17:30:57 -0700 |
| commit | 16a37acaaf4aaa631ba3f83710ed6cdb1a597520 (patch) | |
| tree | 5826c763c70dc6b798c0d12216a80f4596dec284 /net/core | |
| parent | 09177e85d6a0bffac8b55afd28ed8b82bd873f0b (diff) | |
| download | blackbird-op-linux-16a37acaaf4aaa631ba3f83710ed6cdb1a597520.tar.gz blackbird-op-linux-16a37acaaf4aaa631ba3f83710ed6cdb1a597520.zip | |
I/OAT: tcp_dma_copybreak default value dependent on I/OAT version
I/OAT DMA performance tuning showed different optimal values of
tcp_dma_copybreak for different I/OAT versions (4096 for 1.2 and 2048
for 2.0). This patch lets ioatdma driver set tcp_dma_copybreak value
according to these results.
[dan.j.williams@intel.com: remove some ifdefs]
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/user_dma.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/user_dma.c b/net/core/user_dma.c index 0ad1cd57bc39..de760504f6fe 100644 --- a/net/core/user_dma.c +++ b/net/core/user_dma.c @@ -34,6 +34,7 @@ #define NET_DMA_DEFAULT_COPYBREAK 4096 int sysctl_tcp_dma_copybreak = NET_DMA_DEFAULT_COPYBREAK; +EXPORT_SYMBOL(sysctl_tcp_dma_copybreak); /** * dma_skb_copy_datagram_iovec - Copy a datagram to an iovec. |
