From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: expected behavior of PF_PACKET on NETIF_F_HW_VLAN_RX device? Date: Thu, 01 Nov 2007 14:58:28 -0700 (PDT) Message-ID: <20071101.145828.36424380.davem@davemloft.net> References: <20071031.215025.195350296.davem@davemloft.net> <4729EAFF.9050606@candelatech.com> <18218.18134.353553.189622@zeus.sw.starentnetworks.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: greearb@candelatech.com, shemminger@linux-foundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bguo@sw.starentnetworks.com To: djohnson+linux-kernel@sw.starentnetworks.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:45568 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753485AbXKAV63 (ORCPT ); Thu, 1 Nov 2007 17:58:29 -0400 In-Reply-To: <18218.18134.353553.189622@zeus.sw.starentnetworks.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Dave Johnson Date: Thu, 1 Nov 2007 17:36:22 -0400 > bad csum on tx packets as reported by tcpdump is also an issue. We provide a tag to userspace that tcpdump should use to see that the HW is going to checksum the packet, and therefore it should elide trying to verify the checksums. It's not a kernel issue.