From 16a37acaaf4aaa631ba3f83710ed6cdb1a597520 Mon Sep 17 00:00:00 2001 From: Maciej Sosnowski Date: Tue, 22 Jul 2008 17:30:57 -0700 Subject: 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 Signed-off-by: Dan Williams --- net/core/user_dma.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net') diff --git a/net/core/user_dma.c b/net/core/user_dma.c index 0ad1cd57bc3..de760504f6f 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. -- cgit v1.2.3