diff options
| -rw-r--r-- | include/linux/sysctl.h | 1 | ||||
| -rw-r--r-- | include/net/tcp.h | 1 | ||||
| -rw-r--r-- | net/core/user_dma.c | 4 | ||||
| -rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 10 |
4 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 76eaeff76f8..cd9e7c0825a 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -403,6 +403,7 @@ enum NET_TCP_MTU_PROBING=113, NET_TCP_BASE_MSS=114, NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS=115, + NET_TCP_DMA_COPYBREAK=116, }; enum { diff --git a/include/net/tcp.h b/include/net/tcp.h index 578cccf275d..f1f472746e6 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -219,6 +219,7 @@ extern int sysctl_tcp_adv_win_scale; extern int sysctl_tcp_tw_reuse; extern int sysctl_tcp_frto; extern int sysctl_tcp_low_latency; +extern int sysctl_tcp_dma_copybreak; extern int sysctl_tcp_nometrics_save; extern int sysctl_tcp_moderate_rcvbuf; extern int sysctl_tcp_tso_win_divisor; diff --git a/net/core/user_dma.c b/net/core/user_dma.c index 9eee91bcbf3..b7c98dbcdb8 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 diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 6b6c3adfcf0..6a6aa537b7a 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -688,6 +688,16 @@ ctl_table ipv4_table[] = { .mode = 0644, .proc_handler = &proc_dointvec }, +#ifdef CONFIG_NET_DMA + { + .ctl_name = NET_TCP_DMA_COPYBREAK, + .procname = "tcp_dma_copybreak", + .data = &sysctl_tcp_dma_copybreak, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dointvec + }, +#endif { .ctl_name = 0 } }; |