From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jeff V. Merkey" Subject: Re: e1000 82571 Packet Splitting Date: Tue, 22 Nov 2005 15:27:57 -0700 Message-ID: <43839B6D.9060301@soleranetworks.com> References: <43838614.9080807@soleranetworks.com> <4807377b0511221546h7a16c0a9p793e441197b23118@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, Kernel Netdev Mailing List Return-path: To: Jesse Brandeburg In-Reply-To: <4807377b0511221546h7a16c0a9p793e441197b23118@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Jesse Brandeburg wrote: >this should be on netdev. > >On 11/22/05, Jeff V. Merkey wrote: > > >>I have noted that the e1000 driver is now supporting DMA splitting of >>the packet header and payload into separate pages. I also noticed >>that none of the config options enable it. Is anyone using this feature >>at present and has it even been tested on Linux? >> >> > >The 6.2.15 driver off http://prdownloads.sf.net/e1000 will enable it >by default. We've gone through our release approval, which includes >quite a bit of testing. >If the patches posted recently don't include that support, I missed >something :-) > >This is only on the 82571 and greater hardware that packet split is >supported, BTW. > > > Got it. I am merging packet capture support into the e1000 for DSFS for direct cache DMA support. I noticed the two distinct fill routines for the ring buffer. I have enabled DSFS for both with this driver. I will post patches late tonight or in the morning for the 82571 support for DSFS. I will also be posting the patches for 2.6.12, 2.6.10. 2.6.14, Suse 9 and 10.0, Red Hat ES/AS 3 and 4, and Fedora Core 2/3/4 by end of week with the packet splitting capabilities with packet capture on DSFS. This is a very good optimization and should come in handy for reducing header copies in the protocol stacks. Jeff