commit 9593782585e0cf70babe787a8463d492a68b1744
author Chris Leech <christopher.leech@intel.com> Tue May 23 18:02:55 2006 -0700
committer David S. Miller <davem@sunset.davemloft.net> Sat Jun 17 21:25:54 2006 -0700
tree 149401a3973036452a07bed899e70d3b92abe1bf
parent 624d1164730d58a494cc5aa4afa37d02c41e83a7

[I/OAT]: Add a sysctl for tuning the I/OAT offloaded I/O threshold

Any socket recv of less than this ammount will not be offloaded

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/user_dma.c

diff --git a/net/core/user_dma.c b/net/core/user_dma.c
index 9eee91b..b7c98db 100644
--- a/net/core/user_dma.c
+++ b/net/core/user_dma.c
@@ -30,6 +30,10 @@
 #include <linux/rtnetlink.h> /* for BUG_TRAP */
 #include <net/tcp.h>
 
+#define NET_DMA_DEFAULT_COPYBREAK 4096
+
+int sysctl_tcp_dma_copybreak = NET_DMA_DEFAULT_COPYBREAK;
+
 /**
  *	dma_skb_copy_datagram_iovec - Copy a datagram to an iovec.
  *	@skb - buffer to copy