From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261301AbULUTaf (ORCPT ); Tue, 21 Dec 2004 14:30:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261422AbULUTae (ORCPT ); Tue, 21 Dec 2004 14:30:34 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:57751 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S261301AbULUTa3 (ORCPT ); Tue, 21 Dec 2004 14:30:29 -0500 Message-ID: <41C879CB.3040600@pobox.com> Date: Tue, 21 Dec 2004 14:30:19 -0500 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20040922 X-Accept-Language: en-us, en MIME-Version: 1.0 To: dima@s2io.com CC: "Rajat Jain, Noida" , linux-newbie@vger.kernel.org, linux-net@vger.kernel.org, linux-kernel@vger.kernel.org, kernelnewbies@nl.linux.org, "Sanjay Kumar, Noida" , "Deepak Kumar Gupta, Noida" Subject: Re: zero copy issue while receiving the data (counter part of sen dfil e) References: <267988DEACEC5A4D86D5FCD780313FBB02C66FCA@exch-03.noida.hcltech.com> <1103649767.7217.100.camel@beastie> In-Reply-To: <1103649767.7217.100.camel@beastie> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Dmitry Yusupov wrote: > Rajat, > > small correction, if NIC supports DMA operation on receive, than no > extra copy required. Therefore sock_recvmsg() and tcp_read_sock large correction: if NIC supports _checksum_ on receive, then no extra copy is required. Jeff From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: zero copy issue while receiving the data (counter part of sen dfil e) Date: Tue, 21 Dec 2004 14:30:19 -0500 Message-ID: <41C879CB.3040600@pobox.com> References: <267988DEACEC5A4D86D5FCD780313FBB02C66FCA@exch-03.noida.hcltech.com> <1103649767.7217.100.camel@beastie> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1103649767.7217.100.camel@beastie> Sender: linux-newbie-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: dima@s2io.com Cc: "Rajat Jain, Noida" , linux-newbie@vger.kernel.org, linux-net@vger.kernel.org, linux-kernel@vger.kernel.org, kernelnewbies@nl.linux.org, "Sanjay Kumar, Noida" , "Deepak Kumar Gupta, Noida" Dmitry Yusupov wrote: > Rajat, > > small correction, if NIC supports DMA operation on receive, than no > extra copy required. Therefore sock_recvmsg() and tcp_read_sock large correction: if NIC supports _checksum_ on receive, then no extra copy is required. Jeff - To unsubscribe from this list: send the line "unsubscribe linux-newbie" 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.linux-learn.org/faqs