From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Duyck Subject: Re: [Intel-wired-lan] [PATCH] e1000e: Cleanup handling of VLAN_HLEN as a part of max frame size Date: Thu, 09 Apr 2015 08:51:18 -0700 Message-ID: <55269FF6.4090003@gmail.com> References: <20150408204630.4643.37880.stgit@ahduyck-vm-fedora22> <5525B2AE.80301@gmail.com> <5525B62A.1050601@gmail.com> <5525D389.3010700@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: "netdev@vger.kernel.org" , "mike@cchtml.com" , "intel-wired-lan@lists.osuosl.org" , "Ertman, David M" , "Lubetkin, YanirX" To: "Templeman, Chaim" , Hisashi T Fujinaka Return-path: Received: from mail-pd0-f170.google.com ([209.85.192.170]:34172 "EHLO mail-pd0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755599AbbDIPvU (ORCPT ); Thu, 9 Apr 2015 11:51:20 -0400 Received: by pdbqa5 with SMTP id qa5so99922183pdb.1 for ; Thu, 09 Apr 2015 08:51:20 -0700 (PDT) In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On 04/08/2015 11:17 PM, Templeman, Chaim wrote: > We will look into this with the HW architect and get back to you on what the HW limitations actually are on this issue. Chaim, thanks for looking into this. The key piece that would be useful to know is if the 9018 should really be 9022 if you account for both VLAN header and CRC. Based on the documentation for the Windows driver that seems to be the case as they support an MTU of 9014 excluding the 8 bytes for CRC and VLAN header. - Alex