Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751200AbWC2Wxc (ORCPT ); Wed, 29 Mar 2006 17:53:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751194AbWC2WxY (ORCPT ); Wed, 29 Mar 2006 17:53:24 -0500 Received: from [198.78.49.142] ([198.78.49.142]:42501 "EHLO gitlost.site") by vger.kernel.org with ESMTP id S1751165AbWC2WxA (ORCPT ); Wed, 29 Mar 2006 17:53:00 -0500 From: Chris Leech Subject: [PATCH 8/9] [I/OAT] Add a sysctl for tuning the I/OAT offloaded I/O threshold Date: Wed, 29 Mar 2006 14:56:04 -0800 To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Message-Id: <20060329225604.25585.89794.stgit@gitlost.site> In-Reply-To: <20060329225505.25585.30392.stgit@gitlost.site> References: <20060329225505.25585.30392.stgit@gitlost.site> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2248 Lines: 77 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 ca5bdaf..2e6fdef 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 ec177ef..642a3f3 100644 --- a/net/core/user_dma.c +++ b/net/core/user_dma.c @@ -33,6 +33,10 @@ #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 } }; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/