From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752309AbWCKC1r (ORCPT ); Fri, 10 Mar 2006 21:27:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752303AbWCKC1Q (ORCPT ); Fri, 10 Mar 2006 21:27:16 -0500 Received: from [198.78.49.142] ([198.78.49.142]:1797 "EHLO gitlost.site") by vger.kernel.org with ESMTP id S1752304AbWCKC1K (ORCPT ); Fri, 10 Mar 2006 21:27:10 -0500 From: Chris Leech Subject: [PATCH 7/8] [I/OAT] Add a sysctl for tuning the I/OAT offloaded I/O threshold Date: Fri, 10 Mar 2006 18:29:34 -0800 To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Message-Id: <20060311022933.3950.44450.stgit@gitlost.site> In-Reply-To: <20060311022759.3950.58788.stgit@gitlost.site> References: <20060311022759.3950.58788.stgit@gitlost.site> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Any socket recv of less than this ammount will not be offloaded Signed-off-by: Chris Leech --- include/linux/sysctl.h | 1 + include/net/tcp.h | 1 + net/core/user_dma.c | 4 ++++ 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 76eaeff..cd9e7c0 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 afc4b8a..f319368 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -221,6 +221,7 @@ 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 24e51eb..a85d1f1 100644 --- a/net/core/user_dma.c +++ b/net/core/user_dma.c @@ -33,6 +33,10 @@ file called LICENSE. #ifdef CONFIG_NET_DMA +#define NET_DMA_DEFAULT_COPYBREAK 1024 + +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 6b6c3ad..6a6aa53 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 } };